Pilot operated safety valve clack lifting frame

Abstract

The utility model relates to a pilot operated type safety valve clack lifting frame, and relates to the field of safety valve dismounting auxiliary equipment, the pilot operated type safety valve clack lifting frame comprises a lifting rod, the bottom end of the lifting rod is connected with a valve clack, the lifting rod is provided with a lifting assembly for driving the lifting rod to vertically move, and a supporting assembly is arranged between the lifting assembly and a valve seat of the valve clack. The device has the advantages that risks in the disassembling process are reduced, the operation efficiency is improved, and meanwhile equipment damage and maintenance cost are reduced.

Description

Technical Field

[0001] The present application relates to the field of auxiliary equipment for the disassembly of safety valves, and particularly to a pilot-operated safety valve disc lifting frame. Background Technique

[0002] The valve disc and valve stem of the main steam safety valve are connected by a special thread screwing method to ensure the freedom of the valve disc and the centering effect between the valve disc and the valve stem, and ultimately ensure good sealing performance of the main steam safety valve during the operation of the unit.

[0003] Among them, Chinese Patent No.: 202320872196.8, patent name: A device for disassembling and assembling the valve disc of a safety valve, discloses a valve disc clamping assembly for fastening the valve disc of a safety valve and a valve stem clamping assembly for fastening the valve stem; the valve disc clamping assembly includes: a first clamping ring for assembling and connecting to the sealing surface position of the valve disc of the safety valve, a first notch is provided on one side of the first clamping ring; a first bolt fastener detachably connected to the first notch position; and first operating handles connected to opposite sides of the first clamping ring, wherein: the valve disc clamping assembly is sleeved on the outer periphery of the valve disc of the safety valve, and the size of the first notch is adjusted and changed through the first bolt fastener, so that the valve disc clamping assembly is fastened on the outer periphery of the valve disc of the safety valve, the valve disc clamping assembly fixes the valve disc of the safety valve, and the valve stem clamping assembly fixes the valve stem, wherein: operating the valve disc clamping assembly and the valve stem clamping assembly makes the valve disc and the valve stem generate relative movement, and the threads at the end of the valve disc and the valve stem are engaged to achieve the purpose of smoothly separating the valve disc and the valve stem.

[0004] Regarding the above related technologies, the inventor believes that the current disassembly methods are often laborious and prone to jamming of the valve disc due to uneven force application, which not only increases the difficulty of removing the valve disc, but also may cause damage to the valve disc and the sleeve. Utility Model Content

[0005] In order to reduce the risks during the disassembly process, improve the operation efficiency, and at the same time reduce equipment damage and maintenance costs. The present application provides a pilot-operated safety valve disc lifting frame.

[0006] A pilot-operated safety valve disc lifting frame provided by the present application adopts the following technical solutions:

[0007] A pilot-operated safety valve disc lifting frame includes a lifting rod, the bottom end of the lifting rod is connected to the valve disc, a lifting assembly for driving the lifting rod to move vertically is arranged on the lifting rod, and a support assembly is arranged between the lifting assembly and the valve seat of the valve disc.

[0008] Optionally, the support assembly includes a lifting platform, a support rod is vertically arranged on the lifting platform, the top end of the support rod is connected to the lifting platform, and the bottom end of the support rod is relatively connected to the valve seat of the valve disc.

[0009] Optionally, two support rods are oppositely arranged, the lifting rod is located between the two support rods, and an adjusting component is arranged at the position of the lifting platform relative to the support rods.

[0010] Optionally, the adjusting component includes an adjusting groove formed at the position of the lifting platform relative to the support rods. The side wall of the lifting rod is located inside the adjusting groove and is slidably connected therewith. The top end of the lifting rod is tightly fixed to the lifting platform by bolts.

[0011] Optionally, a pressure sleeve gasket is arranged on the side wall of the support rod above the valve seat of the valve flap. The part of the support rod located at the bottom end of the pressure sleeve gasket is threadedly connected to the valve seat of the valve flap, and the part of the support rod located above the pressure sleeve gasket presses on the upper wall of the pressure sleeve gasket.

[0012] Optionally, the support rod includes a support portion at the center. A top connection portion is arranged at the top end of the support portion. The top connection portion extends out from inside the adjusting groove. A bottom connection portion is arranged at the bottom end of the support portion. The diameter of the bottom connection portion is smaller than that of the support portion. A connection groove is formed in the side wall of the pressure sleeve gasket at the position relative to the bottom connection portion. The bottom connection portion extends out from inside the connection groove. The bottom wall of the support portion abuts against the top wall of the pressure sleeve gasket.

[0013] Optionally, the lifting component includes an outer sleeve. The outer sleeve is fixedly connected to the support component. The lifting rod passes through the inside of the outer sleeve and is slidably connected therewith. A handwheel is coaxially rotatably connected to the side wall of the outer sleeve. The handwheel is threadedly connected to the lifting rod.

[0014] Optionally, a reinforcing rib plate is fixedly connected to the side wall of the outer sleeve. The bottom end of the reinforcing rib plate is fixedly connected to the support component.

[0015] Optionally, a guiding hole is coaxially formed inside the outer sleeve at the position relative to the lifting rod. The diameter of the guiding hole is the same as that of the lifting rod. The outer side wall of the lifting rod abuts against the inner side wall of the outer sleeve and is slidable relative thereto.

[0016] Optionally, a conversion joint is arranged at the bottom end of the lifting rod. The top end of the conversion joint is threadedly connected to the lifting rod, and the bottom end of the conversion joint is threadedly connected to the valve flap.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. Solved the problems in the disassembly process of traditional pilot-operated safety valves. The traditional method is not only time-consuming and laborious, but also prone to damage the sealing surface during disassembly. The unique lifting frame structure and operation method of the present invention make the disassembly process easy and efficient, and will not cause any damage to the sealing surface. This not only reduces the operation difficulty, but also improves the maintenance quality of the equipment.

[0019] 2. Improved the disassembly efficiency of the safety valve. The traditional disassembly method takes 10 minutes for each safety valve, while after adopting the present invention, the disassembly time is shortened to only 1 minute per valve. This improvement greatly improves the inspection efficiency and provides a strong guarantee for the production operation of enterprises.

[0020] 3. Enhanced the safety of operators. The traditional disassembly method requires tools such as hammers and crowbars, which pose potential risks of personal injury. The present invention uses a special lifting frame for disassembly, eliminating the need for these dangerous tools, thus reducing the operation risk and ensuring the safety of operators.

[0021] 4. In terms of structural design, this application focuses on simplicity and stability. The structure of the lifting frame is simple and clear, easy to manufacture and maintain, reducing the manufacturing cost and maintenance cost. At the same time, its stability is fully guaranteed, which can ensure the smooth lifting and lowering of the valve flap during disassembly, avoiding damage to the sealing surface. The lifting frame can be reused for different models of pilot-operated safety valves, reducing the operating cost of enterprises and improving economic benefits. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of a valve flap lifting frame of a pilot-operated safety valve in an embodiment of this application.

[0023] Figure 2 is the structural schematic diagram at the position of the adapter of a valve flap lifting frame of a pilot-operated safety valve in an embodiment of this application.

[0024] Description of the reference numerals: 1, lifting rod; 2, lifting assembly; 21, outer sleeve; 22, reinforcing rib plate; 23, handwheel; 24, adapter; 3, support assembly; 31, lifting platform; 32, support rod; 321, support part; 322, top connection part; 323, bottom connection part; 33, pressure sleeve gasket. Detailed Embodiments

[0025] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those described herein, and thus, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0027] The following further elaborates on this application Figure 1-2 in conjunction with the appended drawings.

[0028] An embodiment of this application discloses a pilot-operated safety valve disc lifting frame. Referring to Figure 1 、 Figure 2 , a pilot-operated safety valve disc lifting frame includes a vertically arranged lifting rod 1. A lifting assembly 2 for controlling the lifting and lowering of the lifting rod 1 is arranged on the side wall of the lifting rod 1. A support assembly 3 is arranged on one side of the lifting assembly 2, and the support assembly 3 is used for stably supporting the lifting assembly 2 and the lifting rod 1.

[0029] The support assembly 3 includes a horizontally arranged lifting platform 31. The lifting platform 31 is a horizontally arranged plate-like structure. Vertically arranged support rods 32 are arranged on the side wall of the lifting platform 31. Two support rods 32 are arranged opposite to each other, and the two support rods 32 are respectively located on both sides of the lifting rod 1. The lifting rod 1 is located at the center position of the connection line of the two support rods 32.

[0030] Adjustment grooves are formed at the positions of the upper side wall of the lifting platform 31 relative to the support rods 32. The adjustment grooves completely penetrate the side wall of the lifting platform 31, and the top ends of the support rods 32 extend into the interior of the adjustment grooves. The support rods 32 are slidably connected to the lifting platform 31 within the adjustment grooves, so that the support rods 32 can horizontally move transversely within the adjustment grooves of the lifting platform 31 to adjust valve seats of different specifications.

[0031] The support rod 32 includes a support portion 321 at the central position. A top connection portion 322 is fixedly connected to the top end of the support portion 321. The top connection portion 322 and the support portion 321 are coaxially arranged, and the top support portion 321 extends into the interior of the adjustment groove. The top end of the top support portion 321 extends out from the upper surface of the lifting platform 31. A nut is arranged at the position of the top end of the lifting platform 31 relative to the top support portion 321. A gasket is arranged between the nut and the support platform, and the top end of the support rod 32 is locked by the nut.

[0032] A bottom connection portion 323 is coaxially arranged at the bottom end of the support portion 321. The bottom connection portion 323 is fixedly connected to the support portion 321, and the diameter of the bottom support portion 321 is smaller than that of the support portion 321, so that a clamping platform for clamping is formed between the support portion 321 and the bottom connection portion 323.

[0033] The bottom connecting part 323 is threadedly connected to the valve seat of the valve flap. A bush pad 33 is arranged between the bottom connecting part 323 and the valve seat of the valve flap. A connecting groove is vertically formed on the top wall of the bush pad 33, and the connecting groove penetrates completely through the side wall of the bush pad 33. The bottom connecting part 323 extends into the interior of the connecting groove, and the bottom end of the bottom connecting part 323 extends out from the bottom wall of the bush pad 33 and is threadedly connected to the valve seat of the valve flap.

[0034] The top wall of the bush pad 33 abuts against the bottom wall of the support part 321, and the bottom wall of the bush pad 33 abuts against the top wall of the valve seat of the valve flap. By providing the bush pad 33, the damage of the support rod 32 to the safety valve body and the cylinder liner can be effectively avoided, and the integrity of the equipment is protected.

[0035] The lifting assembly 2 includes an outer sleeve 21 vertically arranged on the lifting platform 31. The outer sleeve 21 is coaxially arranged with the lifting rod 1, and the outer sleeve 21 is fixedly connected to the lifting platform 31. Reinforcing rib plates 22 are arranged at the side wall of the lifting platform 31 relative to the position of the outer sleeve 21. The reinforcing rib plates 22 are triangular structures, and the vertical side walls of the reinforcing rib plates 22 are fixedly connected to the outer sleeve 21, and the horizontal side walls of the reinforcing rib plates 22 are fixedly connected to the lifting platform 31.

[0036] A guiding hole is coaxially formed on the outer sleeve 21, and the guiding hole penetrates completely through the side wall of the outer sleeve 21. The lifting rod 1 penetrates through the interior of the guiding hole, and the outer side wall of the lifting rod 1 abuts against and relatively slides with the inner side wall of the outer sleeve 21.

[0037] A handwheel 23 is coaxially arranged at the top end of the outer sleeve 21. The handwheel 23 is rotatably connected to the outer sleeve 21, and the inner side wall of the handwheel 23 is threadedly connected to the outer side wall of the lifting rod 1. By rotating the handwheel 23, the handwheel 23 drives the lifting rod 1 located inside the outer sleeve 21 to move in an adjusting manner along the height direction.

[0038] A conversion joint 24 is arranged at the bottom end of the lifting rod 1. The top end of the conversion joint 24 is threadedly connected to the lifting rod 1, and the bottom end of the conversion joint 24 is threadedly connected to the valve flap. One end of the conversion joint 24 is machined into a bolt matching the nut of the lifting rod 1 for fastening connection with the lifting rod 1, and the other end is machined into a bolt matching the limit bolts of the valve flaps of different models and sizes of safety valves. The adaptation problem of the limit bolts of the valve flaps of different models of safety valves is solved. Through threaded connection, the conversion joint 24 can be quickly replaced to adapt to different models of safety valves, greatly improving the flexibility and efficiency of the disassembly work.

[0039] During use, the reverse tap method is adopted, and the lifting rod 1 is screwed into the corresponding safety valve disc limit bolt hole through the adapter 24. When the operator rotates the handwheel 23, it can drive the lifting rod 1 to move linearly in the height direction, so as to smoothly lift and remove the safety valve disc. During the whole process, the lifting and lowering of the disc is stable and safe, avoiding the damage and potential safety hazards that may occur in the traditional disassembly method.

[0040] In this application, the term "a plurality of" means at least two or more than two, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A pilot-operated safety valve disc lifting frame, characterized in that: It includes a lifting rod (1), the bottom end of the lifting rod (1) is connected to a valve flap, a lifting assembly (2) for driving the lifting rod (1) to move vertically is arranged on the lifting rod (1), and a support assembly (3) is arranged between the lifting assembly (2) and the valve seat of the valve flap.

2. The pilot-operated safety valve disc lifting frame according to claim 1, characterized in that: The support assembly (3) includes a lifting platform (31), a support rod (32) is vertically arranged on the lifting platform (31), the top end of the support rod (32) is connected to the lifting platform (31), and the bottom end of the support rod (32) is relatively connected to the valve seat of the valve flap.

3. The pilot-operated safety valve disc lifting frame according to claim 2, characterized in that: Two support rods (32) are arranged oppositely, the lifting rod (1) is located between the two support rods (32), and an adjusting assembly is arranged at the position of the lifting platform (31) relative to the support rod (32).

4. The pilot-operated safety valve disc lifting frame according to claim 3, characterized in that: The adjusting assembly includes an adjusting groove opened at the position of the lifting platform (31) relative to the support rod (32), the side wall of the lifting rod (1) is located inside the adjusting groove and is relatively slidably connected, and the top end of the lifting rod (1) is tightly fixed to the lifting platform (31) by bolts.

5. The pilot-operated safety valve disc lifting frame according to claim 4, characterized in that: A pressure sleeve gasket (33) is arranged on the side wall of the support rod (32) above the valve seat of the valve flap, the part of the support rod (32) at the bottom end of the pressure sleeve gasket (33) is threadedly connected to the valve seat of the valve flap, and the part of the support rod (32) above the pressure sleeve gasket (33) presses on the upper wall of the pressure sleeve gasket (33).

6. The pilot-operated safety valve disc lifting frame according to claim 5, characterized in that: The support rod (32) includes a support part (321) at the center, a top connection part (322) is arranged at the top end of the support part (321), the top connection part (322) extends out from the inside of the adjusting groove, a bottom connection part (323) is arranged at the bottom end of the support part (321), the diameter of the bottom connection part (323) is smaller than the diameter of the support part (321), a connection groove is opened at the position of the side wall of the pressure sleeve gasket (33) relative to the bottom connection part (323), the bottom connection part (323) extends out from the inside of the connection groove, and the bottom wall of the support part (321) abuts against the top wall of the pressure sleeve gasket (33).

7. The valve disc lifting frame of a pilot-operated safety valve according to claim 1, characterized in that: The lifting assembly (2) includes an outer sleeve (21), the outer sleeve (21) is fixedly connected to the support assembly (3), the lifting rod (1) passes through the inside of the outer sleeve (21) and is slidably connected, a handwheel (23) is coaxially rotatably connected to the side wall of the outer sleeve (21), and the handwheel (23) is threadedly connected to the lifting rod (1).

8. The valve disc lifting frame of a pilot-operated safety valve according to claim 7, characterized in that: A reinforcing rib plate (22) is fixedly connected to the side wall of the outer sleeve (21), and the bottom end of the reinforcing rib plate (22) is fixedly connected to the support assembly (3).

9. The pilot-operated safety valve disc lifting frame according to claim 7, wherein: A guiding hole is coaxially opened inside the outer sleeve (21) at the position relative to the lifting rod (1), the diameter of the guiding hole is the same as the diameter of the lifting rod (1), and the outer side wall of the lifting rod (1) abuts against and relatively slides with the inner side wall of the outer sleeve (21).

10. The pilot-operated safety valve disc lifting frame according to claim 1, characterized in that: A conversion joint (24) is provided at the bottom end of the lifting rod (1). The top end of the conversion joint (24) is threadedly connected to the lifting rod (1), and the bottom end of the conversion joint (24) is threadedly connected to the valve flap.

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