Valve top rod plugging device

Abstract

The utility model belongs to valve plugging technical field discloses a kind of valve ejector rod plugging device, including sealing assembly and locking assembly, sealing assembly includes flexible sleeve and plugging head, one end of flexible sleeve is connected with plugging head, the other end of flexible sleeve is set in the outer periphery of the ejector rod of valve.Plugging head is connected with the outer periphery of the ejector rod of valve by flexible sleeve, and locking assembly includes locker and locking band, locking band is arranged around the outer periphery of flexible sleeve, the both ends of locking band along its length direction are connected with locker, locker can tighten locking band to make locking band tightly abut flexible sleeve with the outside wall of ejector rod, and the leakage point of ejector rod is located between locking band and plugging head.The valve ejector rod plugging device of the utility model is simple structure, easy to operate, and can effectively improve the plugging effect of stop valve ejector rod.

Description

Technical Field

[0001] This utility model relates to the field of valve plugging technology, and in particular to a valve top rod plugging device. Background Technology

[0002] Gate valves, also known as stop valves, are among the most widely used valves, playing a crucial role in cutting off and throttling the medium in their pipelines. However, during long-term use, factors such as aging and impact can cause deformation of the valve's push rod or the internal sealing ring, leading to leakage. Because disassembling the push rod is difficult and the sealing ring cannot be replaced, traditionally, tape is simply wrapped around the push rod to seal it. This method is unstable, and leakage will still occur after a period of time. Furthermore, when a leak occurs, pressure is generated at the leak point, making manual sealing with tape difficult and prone to insufficient tightness, resulting in poor sealing. Moreover, forcibly using tape to seal the leak can cause the leaking medium to splash under pressure, causing environmental pollution and even endangering the safety of operators. Utility Model Content

[0003] The purpose of this invention is to provide a valve stem plugging device that is simple in structure, easy to operate, and can effectively improve the plugging effect on the stem of a gate valve.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A valve stem plugging device is provided, comprising a sealing assembly and a locking assembly. The sealing assembly includes a flexible sleeve and a plugging head. One end of the flexible sleeve is connected to the plugging head, and the other end of the flexible sleeve is sleeved around the outer periphery of the valve stem.

[0006] The locking assembly includes a locking device and a locking band. The locking band is arranged around the outer periphery of the flexible sleeve. Both ends of the locking band along its length are connected to the locking device. The locking device can tighten the locking band so that the locking band presses the flexible sleeve against the outer wall of the push rod. The leakage point of the push rod is located between the locking band and the sealing head.

[0007] In one embodiment, the end of the sealing head opposite to the flexible sleeve is provided with a pressure relief port, and the sealing head is provided with a pressure relief valve for controlling the opening and closing of the pressure relief port.

[0008] In one embodiment, the locking device includes a locking seat, a locking head, a first set screw, a second set screw, and a driving member. The locking seat has two fixing holes extending along its length direction, and the two fixing holes are spaced apart along the width direction of the locking seat. The locking seat has a plurality of first threaded holes communicating with the fixing holes on one side along its thickness direction, and the first threaded holes correspond one-to-one with the first set screws. The locking head is located on one side of the locking seat along its length direction, and the locking head has two locking holes coaxial with the fixing holes, one-to-one with the fixing holes. The locking head has a second threaded hole communicating with the locking holes on one side along its thickness direction. The second threaded hole corresponds one-to-one with the second set screw; the driving member is mounted on the locking seat, the driving rod of the driving member is located on the side of the locking seat facing the locking head and abuts against the locking head, the two ends of the locking band pass through the locking hole and are inserted into the fixing hole, the first set screw is screwed into the corresponding first threaded hole to press the locking band against the fixing hole, the driving rod can drive the locking head to move relative to the locking band in a direction away from the locking seat to tighten the locking band, and the second set screw is screwed into the corresponding second thread to press the tightened locking band against the locking hole.

[0009] In one embodiment, the drive component includes a hydraulic cylinder and a hydraulic pump, the drive rod is movably disposed within the hydraulic cylinder, the hydraulic cylinder portion is disposed within the locking seat, the hydraulic cylinder is provided with a hydraulic connector extending out of the locking seat, and the hydraulic pump is connected to the hydraulic connector via a hydraulic oil pipe.

[0010] In one embodiment, the valve stem plugging device further includes a rigid outer tube, which is sleeved on the outer periphery of the flexible sleeve. One end of the rigid outer tube is fixed to the plugging head, and the other end of the rigid outer tube extends along the axial direction of the flexible sleeve.

[0011] In one embodiment, the rigid outer tube includes a fixed part and a telescopic part, the fixed part being fixedly connected to the sealing head, and the telescopic part being movable relative to the fixed part along its axial direction.

[0012] In one embodiment, the locking band is stretched and pressed against the flexible sleeve to form a ring structure, the inner diameter of the telescopic part is greater than or equal to the outer diameter of the ring structure, and a first clearance groove is provided on the telescopic part corresponding to the locking head.

[0013] In one embodiment, the valve stem sealing device further includes a sealing element, which has a through hole corresponding to the flexible sleeve. The sealing element is connected to the end of the rigid outer tube away from the sealing head to seal the locking band and the locking head.

[0014] In one embodiment, the outer wall of the rigid outer tube is provided with a plurality of first connecting plates, and the outer wall of the seal is provided with second connecting plates corresponding to the first connecting plates one by one. The first connecting plates are provided with first connecting holes, and the second connecting plates are provided with second connecting holes coaxial with the corresponding first connecting holes.

[0015] In one embodiment, the seal is provided with a second clearance groove corresponding to the locking head.

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses a valve stem plugging device. A flexible sleeve is fitted around the leaking stem of the valve. One end of the flexible sleeve is sealed by a plugging head, and the other end is wrapped with a locking band. The locking band is tightened by a locking device so that the flexible sleeve presses against the outer wall of the stem. At this time, the leakage point of the stem is located between the locking band and the plugging head. The stem is plugged by the locking band and the plugging head, effectively solving the problem of stem leakage. This device has a simple structure and is easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the valve stem sealing device in Embodiment 1;

[0019] Figure 2 This is a schematic diagram of the sealing assembly in Embodiment 1;

[0020] Figure 3 This is a schematic diagram of the locking assembly in Embodiment 1;

[0021] Figure 4 This is a schematic diagram of the locking device in Embodiment 1;

[0022] Figure 5 This is a schematic diagram of the sealing assembly (with rigid outer tube) in Embodiment 1;

[0023] Figure 6 This is a schematic diagram of the rigid outer tube in Example 1;

[0024] Figure 7 This is a top view of the rigid outer tube in one embodiment of Example 1;

[0025] Figure 8 This is a schematic diagram of the sealing element in Example 1;

[0026] Figure 9 This is a top view of the seal in Embodiment 1;

[0027] Figure 10 This is a schematic diagram of the sealing assembly (with rigid outer tube) in Embodiment 2;

[0028] Figure 11 This is a schematic diagram of the sealing element in Example 2.

[0029] In the picture:

[0030] 1. Valve; 2. Push rod;

[0031] 100. Sealing assembly; 110. Flexible sleeve; 120. Sealing head; 121. Pressure relief port; 122. Pressure relief valve; 200. Locking assembly; 210. Locking device; 211. Locking seat; 2111. Fixing hole; 2112. First threaded hole; 212. Locking head; 2121. Locking hole; 2122. Second threaded hole; 2123. Third threaded hole; 213. Drive component; 2131. Hydraulic pump ; 2132, Hydraulic joint; 2133, Hydraulic oil pipe; 220, Locking band; 300, Rigid outer tube; 310, Fixing part; 320, Telescopic part; 330, First clearance groove; 340, First connecting plate; 341, First connecting hole; 400, Seal; 410, Through hole; 420, Second clearance groove; 430, Second connecting plate; 431, Second connecting hole; 510, Bolt; 520, Nut. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Example 1

[0037] like Figures 1 to 9 As shown, a valve stem plugging device according to this embodiment includes a sealing assembly 100 and a locking assembly 200. The sealing assembly 100 includes a flexible sleeve 110 and a plugging head 120. One end of the flexible sleeve 110 is connected to the plugging head 120, and the other end of the flexible sleeve 110 is sleeved on the outer periphery of the stem 2 of the valve 1. The locking assembly 200 includes a locking device 210 and a locking band 220. The locking band 220 is arranged around the outer periphery of the flexible sleeve 110. Both ends of the locking band 220 along its length are connected to the locking device 210. The locking device 210 can tighten the locking band 220 so that the locking band 220 presses the flexible sleeve 110 against the outer wall of the stem 2. The leakage point of the stem 2 is located between the locking band 220 and the plugging head 120.

[0038] In this embodiment, a flexible sleeve 110 is fitted around the leaking push rod 2 of valve 1. One end of the flexible sleeve 110 is sealed by a plug head 120, and the other end is wrapped with a locking band 220. The locking band 220 is tightened by a locking device 210 so that the flexible sleeve 110 presses against the outer wall of the push rod 2. At this time, the leakage point of the push rod 2 is located between the locking band 220 and the plug head 120. The locking band 220 and the plug head 120 complete the sealing of the push rod 2, effectively solving the problem of leakage of the push rod 2. This device has a simple structure and is easy to operate.

[0039] In one embodiment, the end of the sealing head 120 opposite to the flexible sleeve 110 is provided with a pressure relief port 121, and the sealing head 120 is provided with a pressure relief valve 122 for controlling the opening and closing of the pressure relief port 121. In actual operation, due to leakage of the push rod 2, a large pressure will be generated when the flexible sleeve 110 is directly put into the push rod 2. At this time, the pressure leaking from the push rod 2 is discharged from the pressure relief port 121 through the pressure relief valve 122, so that the push rod 2 can be put into the flexible sleeve 110 more easily. After the flexible sleeve 110 is put in place, the locking band 220 is tightened by the locking device 210, and then the pressure relief valve 122 is closed to complete the final sealing.

[0040] In one embodiment, the locking device 210 includes a locking seat 211, a locking head 212, a first set screw, a second set screw, and a driving member 213. The locking seat 211 has two fixing holes 2111 extending along its length direction, and the two fixing holes 2111 are spaced apart along the width direction of the locking seat 211. The locking seat 211 has a plurality of first threaded holes 2112 communicating with the fixing holes 2111 on one side along its thickness direction, and the first threaded holes 2112 correspond one-to-one with the first set screws. The locking head 212 is located on one side of the locking seat 211 along its length direction, and the locking head 212 has two locking holes 2121 coaxial with the fixing holes 2111 corresponding one-to-one. The locking head 212 has a locking hole 2121 coaxial with the locking holes 2121 on one side along its thickness direction. 21. A second threaded hole 2122 is connected, and the second threaded hole 2122 corresponds one-to-one with the second set screw; the driving member 213 is installed on the locking seat 211, and the driving rod of the driving member 213 is located on the side of the locking seat 211 facing the locking head 212 and abuts against the locking head 212. The two ends of the locking band 220 pass through the locking hole 2121 and are inserted into the fixing hole 2111. The first set screw is screwed into the corresponding first threaded hole 2112 to press the locking band 220 against the fixing hole 2111. The driving rod can drive the locking head 212 to move relative to the locking band 220 in a direction away from the locking seat 211 to tighten the locking band 220. The second set screw is screwed into the corresponding second thread to press the tightened locking band 220 against the locking hole 2121.

[0041] In one embodiment, the drive component 213 includes a hydraulic cylinder and a hydraulic pump 2131. The drive rod is movably disposed inside the hydraulic cylinder, and the hydraulic cylinder portion is disposed inside the locking seat 211. The hydraulic cylinder is provided with a hydraulic connector 2132 extending out of the locking seat 211. The hydraulic pump 2131 is connected to the hydraulic connector 2132 through a hydraulic oil pipe 2133. The hydraulic pump 2131 provides driving force to drive the drive rod inside the hydraulic cylinder to move, thereby driving the locking head 212 to move.

[0042] Specifically, firstly, the two ends of the locking band 220 surrounding the flexible sleeve 110 are inserted into the corresponding locking holes 2121 of the locking head 212 and extend into the corresponding fixing holes 2111 (or pass through the fixing holes 2111). The locking band 220 is then pressed against the fixing holes 2111 by screwing the first set screw into the first threaded hole 2112. Then, the hydraulic pump 2131 drives the drive rod in the hydraulic cylinder to abut against the locking head 212 and drive the locking head 212 to move away from the locking seat 211 until the two ends of the locking band 220 are tightened by the locking head 212 (i.e., the locking band 220 presses against the outer wall of the flexible sleeve 110). Then, the second set screw is screwed into the corresponding second threaded hole 2122 to press the tightened locking band 220 against the locking hole 2121, thus completing the tightening and fixing process of the locking band 220. Finally, separate the locking seat 211 from the locking head 212 (cut the locking band 220 between the locking seat 211 and the locking head 212, or loosen the first set screw to separate the locking band 220 from the locking seat 211), and press the locking head 212 and the tightened locking band 220 against the outer wall of the flexible sleeve 110 to complete the locking operation.

[0043] Furthermore, the locking device 210 also includes a third set screw, and the locking head 212 is provided with a third threaded hole 2123 at both ends along its width direction. The third threaded hole 2123 communicates with the locking hole 2121. The third set screw corresponds one-to-one with the third threaded hole 2123. By screwing the third set screw into the third threaded hole 2123, the locking band 220 located in the locking hole 2121 is pressed against the locking hole 2121, so as to further improve the locking and fixing strength between the locking band 220 and the locking head 212, prevent the locking band 220 from coming out of the locking head 212, and improve the overall sealing effect.

[0044] In one embodiment, the valve stem plugging device further includes a rigid outer tube 300, which is sleeved around the flexible sleeve 110. One end of the rigid outer tube 300 is fixed to the plugging head 120, and the other end extends along the axial direction of the flexible sleeve 110. The rigid outer tube 300 provides support to the flexible sleeve 110, preventing the pressure generated by leakage from the stem 2 from impacting the flexible sleeve 110 for a long time, which could weaken the sealing performance of the flexible sleeve 110 and lead to plugging failure.

[0045] In one embodiment, the rigid outer tube 300 includes a fixed part 310 and a telescopic part 320. The fixed part 310 is fixedly connected to the sealing head 120, and the telescopic part 320 can move relative to the fixed part 310 along its axial direction. In actual operation, the push rod 2 is first inserted into the flexible sleeve 110, and then the telescopic part 320 is moved to cover the surface of the flexible sleeve 110, so as to avoid the flexible sleeve 110 being restricted by the rigid outer tube 300 and affecting the smoothness of the insertion of the push rod 2.

[0046] In one embodiment, the locking band 220 is stretched and pressed against the flexible sleeve 110 to form a ring structure. The inner diameter of the telescopic part 320 is greater than or equal to the outer diameter of the ring structure. In actual operation, the inner diameter of the telescopic part 320 is slightly larger than the outer diameter of the ring structure, so that the telescopic part 320 can move to the ring structure and cover the outside of the ring structure, achieving a protective covering effect and minimizing the space for deformation of the flexible sleeve 110 and the ring structure under pressure, thus achieving effective support and preventing excessive deformation of the flexible sleeve 110 and the ring structure that could lead to sealing failure. The telescopic part 320 is provided with a first clearance groove 330 corresponding to the locking head 212, so that the first clearance groove 330 covers the outside of the locking head 212, protecting the locking head 212 and effectively preventing damage to the locking head 212 from impacts by external components, which could affect the locking effect of the locking band 220 and lead to sealing failure.

[0047] In one embodiment, the valve stem sealing device further includes a sealing element 400. The sealing element 400 has a through hole 410 corresponding to the flexible sleeve 110. The inner diameter of the through hole 410 is slightly larger than the outer diameter of the flexible sleeve 110 so that the sealing element 400 can be fitted onto the outside of the flexible sleeve 110. The sealing element 400 is connected to the end of the rigid outer tube 300 away from the sealing head 120 to seal the locking band 220 and the locking head 212, thereby effectively protecting the locking band 220 and the locking head 212 from damage caused by the external environment, which would affect the sealing effect, improve the service life of the device, and achieve a long-term sealing effect.

[0048] In this embodiment, the depth of the first clearance groove 330 is slightly greater than the thickness of the locking head 212, so that when the telescopic part 320 is connected to the seal 400, the locking head 212 can be completely housed in the first clearance groove 330 to achieve an effective protective effect.

[0049] Specifically, the outer wall of the rigid outer tube 300 is provided with a plurality of first connecting plates 340. In this embodiment, the first connecting plates 340 are disposed on the telescopic part 320, and the outer wall of the sealing member 400 is provided with second connecting plates 430 corresponding to the first connecting plates 340. The first connecting plates 340 are provided with first connecting holes 341, and the second connecting plates 430 are provided with second connecting holes 431 coaxial with the corresponding first connecting holes 341. When connecting the telescopic part 320 and the sealing member 400, bolts 510 are passed through the first connecting holes 341 and the second connecting holes 431 respectively, and then nuts 520 are used to connect and lock the bolts 510, thereby achieving a fixed connection between the telescopic part 320 and the sealing member 400.

[0050] Furthermore, a sealing ring (not shown) is provided between the telescopic part 320 and the sealing element 400 to further improve the sealing effect between the telescopic part 320 and the sealing element 400, and at the same time reduce the impact and friction between the telescopic part 320 and the sealing element 400.

[0051] Example 2

[0052] like Figure 10 and Figure 11 As shown, this embodiment is basically the same as embodiment one, except that in this embodiment, the sealing member 400 is provided with a second clearance groove 420 corresponding to the locking head 212. The sum of the thickness of the first clearance groove 330 and the second clearance groove 420 is slightly greater than the thickness of the locking head 212. When the telescopic part 320 is connected and fixed to the sealing member 400, the locking head 212 can be housed in the space formed by the first clearance groove 330 and the second clearance groove 420 to achieve an effective protective effect.

[0053] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A valve stem plugging device, characterized in that, include: A sealing assembly (100) includes a flexible sleeve (110) and a plug (120), one end of the flexible sleeve (110) is connected to the plug (120), and the other end of the flexible sleeve (110) is sleeved on the outer periphery of the top rod (2) of the valve (1); A locking assembly (200) includes a locking device (210) and a locking band (220). The locking band (220) is arranged around the outer periphery of the flexible sleeve (110). Both ends of the locking band (220) along its length are connected to the locking device (210). The locking device (210) can tighten the locking band (220) so that the locking band (220) presses the flexible sleeve (110) against the outer wall of the push rod (2). The leakage point of the push rod (2) is located between the locking band (220) and the sealing head (120).

2. The valve stem plugging device according to claim 1, characterized in that, The end of the plugging head (120) opposite to the flexible sleeve (110) is provided with a pressure relief port (121), and the plugging head (120) is provided with a pressure relief valve (122) for controlling the opening and closing of the pressure relief port (121).

3. The valve stem plugging device according to claim 1, characterized in that, The locking device (210) includes a locking seat (211), a locking head (212), a first set screw, a second set screw, and a driving member (213). The locking seat (211) has two fixing holes (2111) extending along its length direction. The two fixing holes (2111) are spaced apart along the width direction of the locking seat (211). The locking seat (211) has a plurality of first sets screws communicating with the fixing holes (2111) on one side along its thickness direction. The threaded hole (2112) corresponds one-to-one with the first set screw; the locking head (212) is located on one side of the locking seat (211) along its length direction, and the locking head (212) has two locking holes (2121) that are coaxial with the fixing holes (2111) and one-to-one with the fixing holes (2111); the locking head (212) has a second threaded hole (2122) communicating with the locking holes (2121) on one side along its thickness direction. The second threaded hole (2122) corresponds one-to-one with the second set screw; the driving member (213) is installed on the locking seat (211), the driving rod of the driving member (213) is located on the side of the locking seat (211) facing the locking head (212) and abuts against the locking head (212), the two ends of the locking band (220) pass through the locking hole (2121) and are inserted into the fixing hole (2111), the first set screw is screwed into the corresponding first threaded hole (2112) to press the locking band (220) against the fixing hole (2111), the driving rod can drive the locking head (212) to move relative to the locking band (220) in a direction away from the locking seat (211) to tighten the locking band (220), the second set screw is screwed into the corresponding second thread to press the tightened locking band (220) against the locking hole (2121).

4. The valve stem plugging device according to claim 3, characterized in that, The drive unit (213) includes a hydraulic cylinder and a hydraulic pump (2131). The drive rod is movably disposed inside the hydraulic cylinder. The hydraulic cylinder is partially disposed inside the locking seat (211). The hydraulic cylinder is provided with a hydraulic connector (2132) extending out of the locking seat (211). The hydraulic pump (2131) is connected to the hydraulic connector (2132) through a hydraulic oil pipe (2133).

5. The valve stem plugging device according to claim 3 or 4, characterized in that, It also includes a rigid outer tube (300), which is sleeved on the outer periphery of the flexible sleeve (110). One end of the rigid outer tube (300) is fixed on the sealing head (120), and the other end of the rigid outer tube (300) extends along the axial direction of the flexible sleeve (110).

6. The valve stem plugging device according to claim 5, characterized in that, The rigid outer tube (300) includes a fixed part (310) and a telescopic part (320). The fixed part (310) is fixedly connected to the sealing head (120), and the telescopic part (320) can move relative to the fixed part (310) along its axial direction.

7. The valve stem plugging device according to claim 6, characterized in that, The locking band (220) is stretched and pressed against the flexible sleeve (110) to form a ring structure. The inner diameter of the telescopic part (320) is greater than or equal to the outer diameter of the ring structure. A first clearance groove (330) is provided on the telescopic part (320) corresponding to the locking head (212).

8. The valve stem plugging device according to claim 7, characterized in that, It also includes a sealing element (400), which has a through hole (410) corresponding to the flexible sleeve (110). The sealing element (400) is connected to the end of the rigid outer tube (300) away from the plug head (120) to close the locking band (220) and the locking head (212).

9. The valve stem plugging device according to claim 8, characterized in that, The outer wall of the rigid outer tube (300) is provided with a plurality of first connecting plates (340), and the outer wall of the sealing element (400) is provided with second connecting plates (430) corresponding one-to-one with the first connecting plates (340). The first connecting plate (340) is provided with a first connecting hole (341), and the second connecting plate (430) is provided with a second connecting hole (431) coaxial with the corresponding first connecting hole (341).

10. The valve stem plugging device according to claim 8, characterized in that, The sealing element (400) is provided with a second clearance groove (420) corresponding to the locking head (212).

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