A ball valve with a built-in packing gland for quick packing replacement

Abstract

This utility model belongs to the field of ball valve manufacturing technology, specifically relating to a ball valve with a built-in packing gland for quick packing replacement. The ball valve includes a worm gear head, valve body, ball, valve stem, packing ring, and quick-replacement assembly. The valve body also includes an upper gland. The quick-replacement assembly includes an anti-slip screw, a plug, and a fixing component. The worm gear head is located on top of the upper gland, and the ball and valve stem are located within the valve body. The worm gear head is hinged to the valve stem, which is hinged to the top of the ball. The packing ring is fitted onto the valve stem. The quick-replacement assembly is positioned between the upper gland and the valve body. The fixing component is fitted onto the valve stem. The anti-slip screw is movably connected to the fixing component. The plug is positioned between the upper gland and the valve body. By optimizing the structural design of the packing and gland, the replacement process is significantly simplified, eliminating the need for complex disassembly or special tools, greatly shortening maintenance time, and improving equipment availability.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve manufacturing technology, specifically relating to a ball valve with a built-in packing gland that allows for quick packing replacement. Background Technology

[0002] In traditional valve designs, the stuffing box, a key component ensuring valve stem sealing, typically has its gland located outside the valve body. While this structure facilitates external packing tightening, it presents significant drawbacks in practical use: Firstly, packing tightening requires manual adjustment, which is cumbersome and demands experience and skill from the operator. Precise control of the tightening force can lead to poor sealing or excessive valve stem wear. Secondly, when the packing wears or ages and needs replacement, the existing structure often results in a complex, time-consuming, and labor-intensive replacement process, increasing maintenance costs and impacting the valve's continuous operating efficiency and reliability. Therefore, further improvements are needed in the convenience of packing maintenance and the precision of sealing adjustment. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one aspect of the purpose of this utility model is to provide a ball valve with a built-in packing gland for quick packing replacement. The ball valve includes a worm gear head, a valve body, a ball, a valve stem, a packing ring, and a quick-replacement assembly. The valve body also includes an upper gland. The quick-replacement assembly includes an anti-slip screw, a plug, and a fixing member. The worm gear head is disposed on the top of the upper gland. The ball and valve stem are disposed in the valve body. The worm gear head is hinged to the valve stem. The valve stem is hinged to the top of the ball. The packing ring is sleeved on the valve stem. The quick-replacement assembly is disposed between the upper gland and the valve body. The fixing member is sleeved on the valve stem. The anti-slip screw is movably connected to the fixing member. The plug is disposed between the upper gland and the valve body.

[0004] Preferably, the packing ring comprises flexible graphite, which is disposed in the inner ring of the packing ring.

[0005] Preferably, the packing ring further includes a thrust bearing pad, which is disposed at the bottom of the packing ring and sleeved on the valve stem.

[0006] Preferably, the quick-change assembly further includes a double-ended stud, a winged washer, and a nut. The quick-change assembly is disposed inside the valve body via the double-ended stud, the winged washer is disposed between the nut and the fixing member, and the double-ended stud is fixed by the winged washer and the nut.

[0007] Preferably, the fixing member is provided with a fixing member through hole, and the anti-movement screw is disposed in the fixing member through hole.

[0008] Preferably, the valve stem is provided with a groove, and the groove corresponds to the position of the through hole of the fixing member.

[0009] Preferably, the ball valve further includes a rotary handle hinged to the worm gear head.

[0010] Preferably, the ball valve further includes a first O-ring and a second O-ring, the first O-ring being fitted on the outside of the fixing member, and the second O-ring being fitted on the inside and outside of the fixing member, with the first O-ring and the second O-ring being horizontally positioned.

[0011] The beneficial effects of this utility model are as follows: It enables rapid packing replacement: By optimizing the structural design of the packing and gland, the replacement process is significantly simplified, eliminating the need for complex disassembly or special tools, greatly shortening maintenance time and improving equipment availability.

[0012] Capable of safe live-line replacement: The O-ring and pressure isolation design make it possible to replace the packing without shutting down the system to release pressure, effectively avoiding production interruptions and greatly improving the efficiency and economic benefits of valve maintenance. It is especially suitable for industrial scenarios that require continuous operation.

[0013] In summary, this utility model design fundamentally solves the problems of difficult maintenance of traditional valve packing, large downtime losses, and unreliable sealing performance. It has outstanding advantages such as convenient maintenance, high efficiency and economy, safety and reliability, and high degree of intelligence.

[0014] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the ball valve structure of the present invention, which features a built-in packing gland for quick packing replacement. Figure 2 This is a schematic diagram of the quick-change component structure of this utility model; The correspondence between the reference numerals and component names in the figure is as follows: 1 is the worm gear head, 2 is the valve body, 21 is the upper pressure cover, 3 is the ball, 4 is the valve stem, 41 is the groove, 5 is the packing ring, 51 is the flexible graphite, 52 is the thrust bearing pad, 6 is the quick-change assembly, 61 is the anti-slip screw, 62 is the plug, 63 is the fixing part, 64 is the double-ended stud, 65 is the butterfly spring washer, 66 is the nut, 67 is the through hole of the fixing part, 7 is the rotating handle, 8 is the first O-ring, and 9 is the second O-ring. Detailed Implementation

[0016] 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.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0018] This utility model relates to a ball valve with a built-in packing gland for quick packing replacement. The valve includes a worm gear head 1, a valve body 2, an upper gland 21, a ball 3, a valve stem 4, a groove 41, a packing ring 5, flexible graphite 51, a thrust bearing pad 52, a quick-change assembly 6, an anti-slip screw 61, a plug 62, a fixing component 63, a double-ended stud 64, a butterfly spring washer 65, a nut 66, a fixing component through hole 67, a rotating handle 7, a first O-ring 8, and a second O-ring 9.

[0019] like Figure 1 As shown, the worm gear head 1 is located on top of the upper pressure cover 21, and the rotating handle 7 is hinged to the worm gear head 1. The ball 3 and valve stem 4 are located inside the valve body 2. The worm gear head 1 is hinged to the valve stem 4, and the valve stem 4 is hinged to the top of the ball 3. The packing ring 5 is sleeved on the valve stem 4, and the flexible graphite 51 is located in the inner ring of the packing ring 5. The quick-change assembly 6 is located between the upper pressure cover 21 and the valve body 2. The thrust bearing pad 52 is sleeved on the valve stem 4 and located at the bottom of the packing ring 5. The first O-ring 8 is sleeved on the outside of the fixing member 63, and the second O-ring 9 is sleeved on the inside and outside of the fixing member 63. The first O-ring 8 and the second O-ring 9 are horizontally positioned. The quick-change assembly 6 is located inside the valve body 2 through a double-ended stud 64. The butterfly spring washer 65 is located between the nut 66 and the fixing member 63. The double-ended stud 64 is fixed by the butterfly spring washer 65 and the nut 66.

[0020] like Figure 2 As shown, the fixing member 63 is sleeved on the valve stem 4, the anti-slip screw 61 is movably connected to the fixing member 63, the plug 62 is set between the upper pressure cover 21 and the valve body 2, the anti-slip screw 61 is set in the through hole 67 of the fixing member, and the groove 41 corresponds to the position of the through hole 67 of the fixing member.

[0021] Preparation and isolation of valve stem: Loosen the plug 62 and tighten the locking anti-movement screw 61 so that its front end is embedded in the groove 41 of the valve stem 4, thereby axially locking the valve stem and preventing it from moving due to internal pressure during subsequent operations.

[0022] Disassembly of the actuator: Remove the worm gear head 1 to expose the upper end of the valve stem 4. Use the pre-drilled threaded hole at the top of the valve stem 4 to install the lifting eye screw. By lifting the lifting eye, smoothly remove the entire packing ring 5 assembly, including the internal flexible graphite 51 and the bottom thrust bearing pad 52, from the valve cavity.

[0023] Replace the packing: After cleaning the relevant parts, install the new flexible graphite 51 packing into the packing ring 5, and then reinstall the assembled packing ring assembly onto the valve stem 4 and put it back in place.

[0024] Sealing and Reset: Reinstall the worm gear head 1 and ensure a reliable connection. Unscrew the locking anti-slip screw 61 and tighten the plug 62 to the specified torque to complete the replacement operation.

[0025] Pressure sealing principle: Throughout the operation, the system medium pressure is maintained by the quick-change component 6 to ensure sealing. This component is fixed to the valve body 2 by double-ended studs 64 and tightened by butterfly spring washers 65 and nuts 66. Its core seal relies on the double sealing barrier formed by the first O-ring 8 and the second O-ring 9 on the fixing component 63, effectively preventing medium leakage under pressure and ensuring operational safety.

[0026] The above description only describes the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A ball valve with a built-in packing gland for quick packing replacement, characterized in that: The ball valve includes a worm gear head (1), a valve body (2), a ball (3), a valve stem (4), a packing ring (5), and a quick-change assembly (6). The valve body (2) also includes an upper pressure cap (21). The quick-change assembly (6) includes an anti-slip screw (61), a plug (62), and a fixing member (3). The worm gear head (1) is located on top of the upper pressure cap (21). The ball (3) and the valve stem (4) are located inside the valve body (2). The wheel head (1) is hinged to the valve stem (4), the valve stem (4) is hinged to the top of the ball (3), the packing ring (5) is sleeved on the valve stem (4), the quick replacement assembly (6) is set between the upper pressure cover (21) and the valve body (2), the fixing member (63) is sleeved on the valve stem (4), the anti-slip screw (61) is movably connected to the fixing member (63), and the plug (62) is set between the upper pressure cover (21) and the valve body (2).

2. The ball valve with built-in packing gland for quick packing replacement according to claim 1, characterized in that: The packing ring (5) includes flexible graphite (51), which is disposed in the inner ring of the packing ring (5).

3. A ball valve with a built-in packing gland for quick packing replacement according to claim 1, characterized in that: The packing ring (5) also includes a thrust bearing pad (52), which is disposed at the bottom of the packing ring (5) and is fitted onto the valve stem (4).

4. A ball valve with a built-in packing gland for quick packing replacement according to claim 1, characterized in that: The quick-change assembly (6) also includes a double-ended stud (64), a butterfly spring washer (65) and a nut (66). The quick-change assembly (6) is disposed inside the valve body (2) by the double-ended stud (64). The butterfly spring washer (65) is disposed between the nut (66) and the fixing member (63). The double-ended stud (64) is fixed by the butterfly spring washer (65) and the nut (66).

5. A ball valve with a built-in packing gland for quick packing replacement according to claim 1, characterized in that: The fastener (63) is provided with a fastener through hole (67), and the anti-movement screw (61) is provided in the fastener through hole (67).

6. A ball valve with a built-in packing gland for quick packing replacement according to claim 5, characterized in that: The valve stem (4) is provided with a groove (41), and the groove (41) corresponds to the position of the through hole (67) of the fixing component.

7. A ball valve with a built-in packing gland for quick packing replacement according to claim 1, characterized in that: The ball valve also includes a rotating handle (7), which is hinged to the worm gear head (1).

8. A ball valve with a built-in packing gland for quick packing replacement according to claim 1, characterized in that: The ball valve also includes a first O-ring (8) and a second O-ring (9). The first O-ring (8) is fitted on the outside of the fixing member (63), and the second O-ring (9) is fitted on the inside and outside of the fixing member (63). The first O-ring (8) and the second O-ring (9) are in a horizontal position.

Images