Valve rod assembly

Abstract

The utility model relates to the technical field of valve rods, and discloses a valve rod assembly which comprises a driving head, poke rods are symmetrically and fixedly connected to the two ends of the driving head, a fixing lantern ring is fixedly connected to one side of the driving head, a connecting rod is fixedly connected to the inner side of the fixing lantern ring, and a connecting screw rod is fixedly connected to the inner side, away from the driving head, of the connecting rod. Through the driving head, the guide rod, the connecting ring and the fixing screw rod, one side of the driving head is fixedly connected with the connecting rod, the inner side of the connecting rod is fixedly connected with the connecting screw rod, and therefore the driving head can be fixedly connected with the guide rod conveniently, and the connecting ring is in threaded connection with the side face of the guide rod; the fixing screw rod is in threaded connection with the inner side of the connecting ring, so that rapid installation and fixation are facilitated, meanwhile, when parts need to be replaced, rapid segmented disassembly can be achieved, compared with a traditional mode, time can be greatly saved, disassembly and replacement of the whole valve rod can be effectively avoided, and the service life of the valve rod is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve stem technology, and in particular to a valve stem assembly. Background Technology

[0002] The valve stem is a key transmission component of a valve, playing a central role in its opening and closing operation. Its main function is to transmit the motion generated by the drive device to the valve's opening and closing parts, thereby achieving the opening or closing of the valve. Valve stems are made from a variety of materials, commonly including carbon steel, alloy steel, and stainless steel. The choice of material depends primarily on the valve's operating conditions, including the corrosiveness of the medium, temperature, and pressure. For example, stainless steel valve stems are more suitable for highly corrosive media environments, while alloy steel valve stems may better meet the requirements under high temperature and high pressure conditions.

[0003] The utility model patent with patent number 201921905015.7 discloses a valve stem assembly. By setting a limiting flange at the other end of the first rod body, and the second rod body having a threaded section and a connecting end, the connecting end is set at one end of the second rod body, the threaded section is set in the middle of the second rod body, and the connecting end has a connecting hole. This assembly can not only resist corrosion, but also reduce wear, and at the same time prevent the valve stem from bumping during lifting and lowering.

[0004] However, the above-mentioned devices still have some drawbacks in actual use. The most obvious one is that traditional valve stems and valve bodies are mostly designed as a whole, such as by welding or one-piece forging, or by using pins or keyways for installation and fixation. When replacing them, it is necessary to remove the upstream and downstream pipes, drive devices and stuffing boxes of the valve. This makes the whole disassembly and replacement process time-consuming and increases the difficulty of maintaining the valve stem.

[0005] Therefore, it is necessary to invent a valve stem assembly to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a valve stem assembly to solve the problem mentioned in the background art that traditional valve stems and valve bodies are mostly designed as an integral unit, such as by welding or one-piece forging, or by using pins or keyways for installation and fixation. When replacing them, it is necessary to remove the upstream and downstream pipes, drive devices and stuffing boxes of the valve, which results in a long time-consuming process in the entire disassembly and replacement process, and increases the difficulty of maintaining the valve stem.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a valve stem assembly, including a drive head, with a lever symmetrically fixedly connected to both ends of the drive head, a fixing collar fixedly connected to one side of the drive head, a connecting rod fixedly connected to the inner side of the fixing collar, a connecting screw fixedly connected to the inner side of the connecting rod away from the drive head, and a guide rod fixedly connected to the end of the connecting screw.

[0008] A connecting ring is fixedly connected to the outer side of the guide rod away from the connecting screw, and an installation rod is fixedly connected to the inner side of the connecting ring away from the guide rod. A connecting block is fixedly connected to the end of the installation rod, and a fixing screw is fixedly connected to the other end of the connecting block.

[0009] As a preferred embodiment, the inner side of the fixing collar is provided with an inner groove, the inner side of the inner groove is provided with an internal thread, the outer side of the connecting rod near the fixing collar is provided with an external thread, and the outer side of the connecting rod away from the fixing collar is fixedly connected with a first fixing nut.

[0010] As a preferred embodiment, the inner side of the connecting rod is provided with an internal thread, the outer side of the connecting screw is provided with an external thread, and the connecting screw is threadedly fixed to the inner side of the connecting rod.

[0011] As a preferred embodiment, a fixing rod is fixedly connected to the side of the guide rod away from the connecting screw, and an outer sleeve is fixedly connected to the outside of the fixing rod, with external threads provided on the outside of the outer sleeve.

[0012] As a preferred embodiment, the inner and outer sides of the connecting ring are respectively provided with internal threads and external threads, and the connecting ring is fixedly connected to the outer side of the outer sleeve through the internal thread.

[0013] As a preferred embodiment, a second fixing nut is fixedly connected to the outer side of the connecting block, and the outer side of the mounting rod is provided with external threads and the mounting rod is threadedly fixedly connected to the inner side of the connecting ring.

[0014] As a preferred embodiment, a first sealing ring is sleeved on the outer side of the fixing rod, the first sealing ring is disposed on the side of the outer sleeve, an annular groove is formed on the side of the connecting ring near the mounting rod, and a second sealing ring is sleeved on the outer side of the mounting rod, the second sealing ring being disposed corresponding to the annular groove.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. This utility model comprises a drive head, a guide rod, a connecting ring, and a fixing screw. A connecting rod is fixedly connected to one side of the drive head, and a connecting screw is fixedly connected to the inner side of the connecting rod, thus facilitating a fixed connection with the guide rod. The connecting ring is threaded to the side of the guide rod, and the fixing screw is threaded to the inner side of the connecting ring, thus facilitating quick installation and fixing. At the same time, when it is necessary to replace some parts, it can be quickly disassembled in sections, which can save a lot of time compared with the traditional method and effectively avoid the disassembly and replacement of the entire valve stem, thereby improving the service life of the valve stem.

[0017] 2. This utility model provides a first sealing ring on the outside of the fixed rod, an annular groove on the side of the connecting ring, and a second sealing ring on the outside of the mounting rod. The second sealing ring can be located inside the annular groove. This effectively improves the sealing performance between multiple components after the components are connected, reduces the wear of the packing, and extends the service life of the valve stem. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the drive head in this utility model;

[0020] Figure 3 This is a schematic diagram of the guide rod and connecting ring in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the fixing screw in this utility model.

[0022] In the picture:

[0023] 1. Drive head; 11. Actuating lever; 12. Fixing collar; 121. Inner groove; 13. Connecting rod; 131. First fixing nut;

[0024] 2. Guide rod; 21. Connecting screw; 22. Fixing rod; 221. Outer sleeve; 23. First sealing ring;

[0025] 3. Connecting ring; 31. Annular groove;

[0026] 4. Fixing screw; 41. Connecting block; 42. Second fixing nut; 43. Mounting rod; 44. Second sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see the appendix Figure 1 - Appendix Figure 4 A valve stem assembly includes a drive head 1, with a lever 11 symmetrically fixedly connected to both ends of the drive head 1, a fixing collar 12 fixedly connected to one side of the drive head 1, a connecting rod 13 fixedly connected to the inner side of the fixing collar 12, a connecting screw 21 fixedly connected to the inner side of the connecting rod 13 away from the drive head 1, and a guide rod 2 fixedly connected to the end of the connecting screw 21.

[0029] A connecting ring 3 is fixedly connected to the outer side of the guide rod 2 away from the connecting screw 21. An installation rod 43 is fixedly connected to the inner side of the connecting ring 3 away from the guide rod 2. A connecting block 41 is fixedly connected to the end of the installation rod 43. A fixing screw 4 is fixedly connected to the other end of the connecting block 41.

[0030] Specifically, the valve stem is connected to the drive head 1, guide rod 2, connecting ring 3, and fixing screw 4. A connecting rod 13 is fixedly connected to one side of the drive head 1, and a connecting screw 21 is fixedly connected to the inner side of the connecting rod 13, which facilitates the fixed connection with the guide rod 2. The connecting ring 3 is threaded to the side of the guide rod 2, and the fixing screw 4 is threaded to the inner side of the connecting ring 3, which facilitates quick installation and fixing. At the same time, when it is necessary to replace some parts, it can be quickly disassembled in sections, which can save a lot of time compared with the traditional method and effectively avoid the disassembly and replacement of the entire valve stem, thus improving the service life of the valve stem.

[0031] Please see the appendix Figure 2 The inner side of the fixing collar 12 is provided with an inner groove 121, and the inner side of the inner groove 121 is provided with an internal thread. The outer side of the connecting rod 13 near the fixing collar 12 is provided with an external thread, and the outer side of the connecting rod 13 away from the fixing collar 12 is fixedly connected with a first fixing nut 131.

[0032] Specifically, an inner groove 121 is provided on the inner side of the fixing collar 12, and an internal thread is provided on the inner side of the inner groove 121. An external thread is provided on the outer side of the connecting rod 13 near the fixing collar 12. A first fixing nut 131 is fixedly connected to the outer side of the connecting rod 13 away from the fixing collar 12. The first fixing nut 131 is fixedly connected to the outer side of the connecting rod 13, so that the first fixing nut 131 can drive the connecting rod 13 to rotate, which makes it convenient to thread the connecting rod 13 to the inner side of the inner groove 121, and at the same time, it can be quickly disassembled.

[0033] Please see the appendix Figure 2 and Figure 3 The inner side of the connecting rod 13 is provided with an internal thread, and the outer side of the connecting screw 21 is provided with an external thread. The connecting screw 21 is threadedly fixed to the inner side of the connecting rod 13.

[0034] Specifically, when assembly is required, the connecting screw 21 can be quickly and threadedly fixed to the inside of the connecting rod 13, thus facilitating rapid assembly.

[0035] Please see the appendix Figure 3A fixed rod 22 is fixedly connected to the side of the guide rod 2 away from the connecting screw 21. An outer sleeve 221 is fixedly connected to the outside of the fixed rod 22. An external thread is provided on the outside of the outer sleeve 221. An internal thread and an external thread are provided on the inside and outside of the connecting ring 3, respectively. The connecting ring 3 is fixedly connected to the outside of the outer sleeve 221 by the internal thread.

[0036] Specifically, during use, the connecting ring 3 can be threaded onto the outside of the outer sleeve 221 by rotating the connecting ring 3, which effectively fixes the connecting ring 3 to the side of the guide rod 2.

[0037] Please see the appendix Figure 4 The outer side of the connecting block 41 is fixedly connected to the second fixing nut 42, and the outer side of the mounting rod 43 is provided with external thread and the mounting rod 43 is threadedly fixedly connected to the inner side of the connecting ring 3.

[0038] Specifically, by setting a second fixing nut 42, which is fixed on the outside of the connecting block 41, the connecting block 41 can be effectively driven to rotate. The mounting rod 43 is fixedly connected to the connecting block 41, so that the second fixing nut 42 can drive the mounting rod 43 to rotate, making it easy to thread the mounting rod 43 onto the inside of the connecting ring 3, and also facilitating disassembly.

[0039] Please see the appendix Figure 3 and Figure 4 A first sealing ring 23 is sleeved on the outside of the fixing rod 22. The first sealing ring 23 is located on the side of the outer sleeve 221. An annular groove 31 is provided on the side of the connecting ring 3 near the mounting rod 43. A second sealing ring 44 is sleeved on the outside of the mounting rod 43. The second sealing ring 44 is correspondingly provided with the annular groove 31.

[0040] Specifically, by sleeved with a first sealing ring 23 on the outside of the fixed rod 22, when the connecting ring 3 is threaded to the outer sleeve 221, the first sealing ring 23 can be set between the fixed rod 22 and the connecting ring 3, and the height of the first sealing ring 23 is slightly higher than that of the outer sleeve 221, thereby effectively ensuring the sealing between the connecting ring 3 and the fixed rod 22 after the connecting ring 3 is threaded to the outside of the outer sleeve 221. By providing an annular groove 31 on the side of the connecting ring 3, after the mounting rod 43 is threaded to the inside of the connecting ring 3, the first sealing ring 23 can be set inside the annular groove 31, thereby effectively improving the sealing between the second fixing nut 42 and the connecting ring 3. By providing a first sealing ring 23 and a second sealing ring 44 for sealing at both ends of the connecting ring 3, the sealing performance of the connecting ring 3 during use is effectively improved, the sealing performance between multiple components is effectively improved, the wear of the packing is reduced, and the service life of the valve stem is extended.

[0041] The working principle of this utility model is as follows: When assembly is required, the connecting rod 13 is threaded onto the inner side of the inner groove 121 using the first fixing nut 131, and then the guide rod 2 is rotated to drive the connecting screw 21 to rotate, so that the end of the connecting screw 21 is threaded onto the inner side of the connecting rod 13.

[0042] Remove the connecting ring 3 and thread it onto the outside of the outer sleeve 221. Finally, thread the mounting rod 43 onto the inside of the connecting ring 3 to complete the assembly of the valve stem.

[0043] When components need to be replaced, they can be quickly disassembled in sections, saving significant time compared to traditional methods. This also effectively avoids the need to disassemble and replace the entire valve stem, thus extending its service life. A first sealing ring 23 is fitted onto the outside of the fixed rod 22. When the connecting ring 3 is threaded onto the outer sleeve 221, the first sealing ring 23 is positioned between the fixed rod 22 and the connecting ring 3. The height of the first sealing ring 23 is slightly higher than that of the outer sleeve 221, effectively ensuring that the connecting ring 3, after being threaded onto the outside of the outer sleeve 221, provides protection for the connecting ring 3 and the fixed rod. The sealing between the second fixing nut 42 and the connecting ring 3 is improved by providing an annular groove 31 on the side of the connecting ring 3. After the mounting rod 43 is threaded to the inner side of the connecting ring 3, the first sealing ring 23 can be set inside the annular groove 31, thereby effectively improving the sealing between the second fixing nut 42 and the connecting ring 3. By providing a first sealing ring 23 and a second sealing ring 44 for sealing at both ends of the connecting ring 3, the sealing performance of the connecting ring 3 during use is effectively improved, the sealing performance between multiple components is effectively improved, the wear of the packing is reduced, and the service life of the valve stem is extended.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve stem assembly, comprising a drive head (1), wherein a lever (11) is symmetrically fixedly connected to both ends of the drive head (1), characterized in that: A fixing collar (12) is fixedly connected to one side of the drive head (1), a connecting rod (13) is fixedly connected to the inner side of the fixing collar (12), a connecting screw (21) is fixedly connected to the inner side of the connecting rod (13) away from the drive head (1), and a guide rod (2) is fixedly connected to the end of the connecting screw (21). A connecting ring (3) is fixedly connected to the outer side of the guide rod (2) away from the connecting screw (21). An installation rod (43) is fixedly connected to the inner side of the connecting ring (3) away from the guide rod (2). A connecting block (41) is fixedly connected to the end of the installation rod (43). A fixing screw (4) is fixedly connected to the other end of the connecting block (41).

2. The valve stem assembly according to claim 1, characterized in that: The inner side of the fixing collar (12) is provided with an inner groove (121), and the inner side of the inner groove (121) is provided with an internal thread. The outer side of the connecting rod (13) near the fixing collar (12) is provided with an external thread, and the outer side of the connecting rod (13) away from the fixing collar (12) is fixedly connected with a first fixing nut (131).

3. A valve stem assembly according to claim 2, characterized in that: The inner side of the connecting rod (13) is provided with an internal thread, and the outer side of the connecting screw (21) is provided with an external thread. The connecting screw (21) is threadedly fixed to the inner side of the connecting rod (13).

4. A valve stem assembly according to claim 3, characterized in that: The guide rod (2) is fixedly connected to a fixing rod (22) on the side away from the connecting screw (21). The outer sleeve (221) is fixedly connected to the outside of the fixing rod (22), and the outer sleeve (221) is provided with an external thread.

5. A valve stem assembly according to claim 4, characterized in that: The inner and outer sides of the connecting ring (3) are respectively provided with internal threads and external threads, and the connecting ring (3) is fixedly connected to the outer side of the outer sleeve (221) by the internal thread.

6. A valve stem assembly according to claim 5, characterized in that: The outer side of the connecting block (41) is fixedly connected to a second fixing nut (42), and the outer side of the mounting rod (43) is provided with an external thread and the mounting rod (43) is threadedly fixedly connected to the inner side of the connecting ring (3).

7. A valve stem assembly according to claim 6, characterized in that: The outer side of the fixing rod (22) is fitted with a first sealing ring (23), which is located on the side of the outer sleeve (221). The connecting ring (3) has an annular groove (31) on the side near the mounting rod (43). The outer side of the mounting rod (43) is fitted with a second sealing ring (44), which is correspondingly arranged with the annular groove (31).

Images