A packing gland fastening tool for a stop valve

Abstract

The utility model relates to the technical field of lifting gathering and transportation station valve equipment maintenance, especially to a stop valve packing gland fastening tool, including two arc shape embrace and key, both ends of two arc shape embrace all are fixed with connecting piece, two arc shape embrace are fastened together after through connecting piece and enclose into a whole circle, be equipped with a plurality of keyways on the inner wall surface of arc shape embrace, the shape and size of the hole formed after the keyway and the force slot of packing gland are opened and enclose are all with key adaptation, the outer surface of arc shape embrace is fixed with handle. Through the stable fastening tool of surrounding and forming the setting on packing gland, realize the transmission of fastening tool rotation moment to packing gland through the cooperation of key and slot, thereby realized the stable fastening of packing gland.

Description

Technical Field

[0001] This utility model relates to the field of maintenance technology for valve equipment in lifting and gathering stations, and in particular to a tool for fastening the packing gland of a gate valve. Background Technology

[0002] In the oil and gas transportation sector, gathering and transportation stations serve as critical hubs, and ensuring their safe and stable operation is crucial for the entire oil and gas pipeline. The FJ41Y type throttling and shut-off venting valve is widely used in these stations, bearing the heavy responsibility of venting operations during emergencies or maintenance. However, as the valves age, numerous problems gradually emerge. Firstly, due to frequent opening and closing of the valves over long periods and the pressure and temperature changes within the pipeline, the packing gland connection loosens. Simultaneously, fluctuations in outdoor ambient temperature and the natural aging of materials cause a decline in the sealing performance of the PTFE (polytetrafluoroethylene) valve stem packing, leading to packing loosening and ultimately leakage. Natural gas leakage not only wastes oil and gas resources but also poses a significant safety hazard, potentially causing explosions, fires, and environmental pollution. From a design perspective, the valve packing gland has three force grooves evenly distributed around its outer circumference. Existing technology often uses long-handled tools for tightening, typically inserting one end of the tool into the force groove and then using the valve body window edge as a fulcrum to pry the packing gland using leverage. However, using long-handled tools creates dead angles in the force application, making it difficult to apply force evenly and easily leading to incomplete tightening, thus still posing a risk of natural gas leakage. Furthermore, using the valve body window edge as a fulcrum can easily damage the valve body, and the narrow internal space of the valve body window makes operation difficult. In addition, when workers use long-handled tools to tighten the packing gland, the shallow force grooves make the tool prone to slipping, causing maintenance personnel to fall forward or suffer hand injuries, posing a significant safety risk. In actual operation and maintenance, gathering and transmission stations are typically equipped with a large number of such gate valves. Due to the difficulty of tightening, each tightening operation takes a very long time, which is both time-consuming and labor-intensive, impacting operational efficiency.

[0003] For example, Chinese utility model patent CN219854382U discloses a fastening tool for a gate valve packing gland, including a semi-circular ring with a positioning block connected to each side. A positioning post is connected to one side of each positioning block. This utility model combines the semi-circular ring, insertion holes, and positioning posts. The arc-shaped structure of the semi-circular ring allows it to easily bypass the screw in the middle of the gate valve packing gland, while also facilitating the insertion of the positioning posts on both sides of the semi-circular ring into the slots on both sides of the gate valve packing gland valve core adjustment end. This ensures the semi-circular ring maintains a proper fit with the gate valve packing gland valve core adjustment end. A lever is formed on the gate valve packing gland valve core adjustment end by inserting the insertion post into the insertion hole, allowing the operator to rotate the gate valve packing gland valve core adjustment end without excessive damage. However, this tool is still loosely mounted on the packing gland during use, and its stability under stress remains a problem. Therefore, there is an urgent need in the prior art for a packing gland fastening tool that is easy to operate and has good operational stability. Utility Model Content

[0004] The purpose of this utility model is to provide a gate valve packing gland fastening tool to solve the technical problems of low operational stability and poor safety of existing gate valve packing gland fastening tools.

[0005] To achieve the above objectives, this utility model provides a stop valve packing gland fastening tool, including two arc-shaped clamps and a key. Both ends of the two arc-shaped clamps are fixed with connectors. The two arc-shaped clamps are fastened together by the connectors to form a complete circle. The inner wall surface of the arc-shaped clamps is provided with several keyways. The shape and size of the hole formed by the keyways and the force groove opened on the packing gland are adapted to the key. A handle is fixed on the outer surface of the arc-shaped clamps.

[0006] Furthermore, the connector is a connecting ear plate, and the two arc-shaped clamps are fastened together by bolts and nuts passing through the connecting ear plate to form the complete circle.

[0007] Furthermore, in a set of connectors used for fastening together, one connector has a slot and the other connector has a block that slides and engages with the slot.

[0008] Furthermore, in a set of connectors used for fastening together, one connector has a dovetail groove, and the other connector has a dovetail block that slides and engages with the dovetail groove.

[0009] Furthermore, in a set of connectors used for fastening together, one connector has a T-groove, and the other connector has a T-block that slides and engages with the T-groove.

[0010] Furthermore, the keyways are evenly distributed circumferentially on the inner wall surface of the arc-shaped retainer.

[0011] Furthermore, at least three keyways are provided on the inner wall surface of the arc-shaped retainer.

[0012] Furthermore, the handle is a straight rod that is perpendicular to the outer wall of the arc-shaped clamp and extends outward along the radial direction of the entire circle.

[0013] Furthermore, the keyway is a square groove that extends longitudinally through the arc-shaped retainer so that the hole is a square hole that extends longitudinally; or, the keyway is a square groove so that the hole is a square hole, and the bottom of the keyway is provided with a protrusion extending along the radial direction of the entire circle.

[0014] Furthermore, a soft protective layer is provided on the inner wall surface of the arc-shaped clamp.

[0015] Beneficial Effects: This utility model is a pioneering invention. It features two arc-shaped retainers, which are fastened together by a connector to form a complete circle that fits the outer circumference of the packing gland. After being formed, the two arc-shaped retainers have an interference fit with the packing gland. The inner wall of each arc-shaped retainer has a keyway. In use, the keyway is aligned with the force-bearing groove on the outer circumference of the packing gland, and then a key that matches the hole formed by the keyway and force-bearing groove is inserted. This allows the arc-shaped retainer to engage with the packing gland circumferentially via the key. Rotating the handle fixed on the outer wall of the arc-shaped clamp allows the rotational force to be transmitted to the packing gland via a key, thereby rotating the packing gland and tightening it. Since the two arc-shaped clamps are fastened together by a connector to form a complete circle, the entire fastening tool is completely fitted and fixed on the packing gland. The connection between the fastening tool and the packing gland is extremely stable. When rotating the tool to tighten the packing gland, it is not easy for the fastening tool to detach from the packing gland. This makes the fastening tool of this invention have good operational stability and high safety. Attached Figure Description

[0016] Figure 1 This is an exploded view of the sealing valve packing gland fastening tool of this utility model in application. Figure 2 This is a schematic diagram of the gate valve packing gland fastening tool of this utility model; Figure 3 This is a schematic diagram of the application of the gate valve packing gland fastening tool of this utility model.

[0017] The components include: 1. packing gland; 2. arc-shaped clamp; 3. keyway; 4. handle; 5. connecting ear plate; 6. key. Detailed Implementation

[0018] To address the problems in the background technology, the core inventive concept of this utility model is as follows: by forming a stable fastening tool that is sleeved on the packing gland through an enclosure, the torque of the fastening tool is transmitted to the packing gland through the cooperation of the key and the groove, thereby achieving stable fastening of the packing gland.

[0019] The present invention will be further described in detail below with reference to an embodiment of a stop valve packing gland fastening tool.

[0020] like Figure 1 and Figure 2 As shown, the gate valve packing gland 1 fastening tool of this utility model includes two arc-shaped clamps 2 and a key 6. Connectors are fixed to both ends of the two arc-shaped clamps 2, and the connectors are connecting ear plates 5. The two arc-shaped clamps 2 are fastened together by bolts and nuts passing through the connecting ear plates 5, forming a complete circle. Bolt holes are distributed on the connecting ear plates 5 of the arc-shaped clamps 2, which is a conventional structure for achieving tight connection and adjustment of the tool components. By passing the bolts through the bolt holes, the two arc-shaped clamps 2 can be firmly fixed to the periphery of the packing gland 1. At the same time, the tightness of the bolts can be finely adjusted according to actual needs to adapt to gate valve packing glands 1 of different specifications and wear levels, ensuring that the entire fastening tool is stably and reliably fixed to the packing gland 1 during the fastening process, without problems such as the fastening tool falling apart or slipping relative to the packing gland 1.

[0021] The inner wall of the arc-shaped clamp 2 has eight keyways 3 evenly distributed circumferentially. The shape and size of the hole formed by the keyways 3 and the force-receiving groove on the packing gland 1 are adapted to the key 6. The keyways 3 match the force-receiving groove on the packing gland 1. When the tool is installed in place, the key 6 is precisely embedded in the keyway 3 and the force-receiving groove, which plays a role in precise positioning and driving rotation. The depth, width, and inner wall roughness of the keyways 3 have been optimized to ensure the smooth embedding of the key 6 and to prevent the tool from shifting or shaking due to uneven force during the tightening operation, further improving the accuracy and efficiency of the tightening operation.

[0022] The keyway 3 is a square groove that runs longitudinally through the arc-shaped clamp 2, making the hole a square hole that runs longitudinally through. At this time, the key 6 is clamped by the arc-shaped clamp 2 and the force-bearing groove to prevent the key 6 from falling off. The arc-shaped clamp 2, as a component that directly contacts and fixes the packing gland 1, has a shape that closely matches the outer contour of the gate valve packing gland 1. It is made of explosion-proof alloy material, possessing good rigidity, wear resistance, and explosion-proof performance, ensuring safety while withstanding the enormous torque during tightening without deformation. A soft protective layer is provided on the inner wall of the arc-shaped clamp 2. This soft protective layer on the inner wall of the arc-shaped clamp 2 prevents scratching the surface of the packing gland 1 during tightening and increases friction, ensuring a tight fit between the arc-shaped clamp 2 and the packing gland 1, preventing loosening and slippage, and ensuring tightening stability.

[0023] A handle 4 is fixed to the outer surface of the arc-shaped clamp 2. The handle 4 is a straight rod perpendicular to the outer wall of the arc-shaped clamp 2 and extending outward along the radial direction of the entire circle. The straight rod handle is the main part for the operator to apply force. Its design fully considers the principles of ergonomics. Its moderate length ensures that the operator can maintain a safe distance from the shut-off valve during operation, avoiding potential dangers such as media leakage. At the same time, it can also use the lever principle to allow the operator to apply sufficient tightening force to the packing gland 1 with a small amount of force. The surface of the handle 4 is treated with anti-slip texture to ensure that the operator can still hold the handle 4 firmly and apply force accurately even in complex working environments such as wet and oily conditions.

[0024] like Figure 3 As shown, the method for tightening the gate valve packing gland using the gate valve packing gland tightening tool of this utility model is as follows: The two arc-shaped clamps 2 operate independently before use. When tightening the packing gland 1 of the gate valve, the operator first aligns the two arc-shaped clamps 2 with the two sides of the packing gland 1, ensuring a tight fit between the clamps. The operator then rotates the handle 4 to create square holes for installing keys 6, where the keyways 3 evenly distributed on the inner wall of the arc-shaped clamps 2 correspond to the force-bearing grooves of the packing gland 1 according to the rotation direction. The keys 6 are then inserted into the square holes formed by the keyways 3 and the force-bearing grooves, achieving precise positioning of the tightening tool on the packing gland 1. Next, bolts are passed through the bolt holes on the connecting ear plate 5, firmly connecting the two arc-shaped clamps 2 into a single unit. The operator then holds the handle 4 and tightens the arc-shaped clamps 2. The handle 4 evenly transmits force to the arc-shaped clamps 2, while the keys 6 transfer the rotational force from the arc-shaped clamps 2 to the packing gland 1, tightly compacting the packing and achieving a good sealing effect, ensuring no media leakage during gate valve operation. If the rotation angle is limited, the key 6 can be removed and the arc-shaped retainer 2 can be rotated so that the other keyway 3 corresponds to the force groove. Then the key 6 can be reinserted and the above tightening operation can be repeated until the tightening purpose is achieved.

[0025] This invention utilizes keyways 3 and key 6 to connect the fastening tool with the force-receiving groove of the packing gland 1. This allows for smooth rotation of the packing gland 1 without requiring significant friction on its outer circumference, greatly simplifying the operation. Simply align the two arc-shaped clamps 2 precisely from both sides of the gate valve packing gland 1 for quick and easy tightening. With minimal hand force, the handle 4 evenly and efficiently transmits the force to the arc-shaped clamps 2, transforming it into a strong and stable tightening force on the packing gland 1. The operation is easy and labor-saving, significantly reducing the operator's workload. Before use, the structure of the keyway 3 and the packing gland 1 can be repeatedly simulated, optimized, and calibrated through on-site testing. Once the tool is installed, key 6 can be precisely and securely embedded in the keyway 3 and the force-receiving groove, effectively preventing any deviation or shaking of the fastening tool during the tightening process and ensuring that the force transmission path remains accurate.

[0026] In the above embodiment, the connector is a connecting ear plate 5. The two arc-shaped clamps 2 are fastened together by bolts and nuts passing through the connecting ear plate 5 to form the whole circle. In other embodiments, in a set of connectors used for fastening together, one connector is provided with a slot, and the other connector is provided with a block that slides and engages with the slot.

[0027] In the above embodiment, the connector is a connecting ear plate 5. The two arc-shaped clamps 2 are fastened together by bolts and nuts passing through the connecting ear plate 5 to form the whole circle. In other embodiments, in a set of connectors used for fastening together, one connector is provided with a dovetail groove, and the other connector is provided with a dovetail block that slides and engages with the dovetail groove.

[0028] In the above embodiment, the connector is a connecting ear plate 5. The two arc-shaped clamps 2 are fastened together by bolts and nuts passing through the connecting ear plate 5 to form the whole circle. In other embodiments, in a set of connectors used for fastening together, one connector is provided with a T-shaped groove, and the other connector is provided with a T-shaped block that slides and engages with the T-shaped groove.

[0029] In the above embodiments, the keyway 3 is a square groove that extends longitudinally through the arc-shaped clamp 2 so that the hole is a square hole that extends longitudinally. In other embodiments, the keyway 3 is a square groove so that the hole is a square hole. The bottom of the keyway 3 is provided with a protrusion extending along the radial direction of the whole circle to provide upward support for the key 6 in the longitudinal direction, so as to prevent the key 6 from falling out of the hole formed by the keyway 3 and the force groove in the longitudinal direction, thereby ensuring the stability of the connection between the fastening tool and the packing gland 1.

[0030] In the above embodiments, the surface of the handle 4 is treated with anti-slip material and engraved with anti-slip texture, while in other embodiments, the surface of the handle 4 is covered with anti-slip rubber.

[0031] In the above embodiments, the keyway 3 is a square groove that runs longitudinally through the arc-shaped retainer 2 so that the hole is a square hole that runs longitudinally through the retainer 2. In other embodiments, the keyway 3 is a semi-circular groove that runs longitudinally through the arc-shaped retainer 2, and the key 6 is a semi-circular shape that matches the semi-circular groove at one end of the semi-circular groove of the arc-shaped retainer 2.

[0032] In the above embodiments, the handle 4 is a straight rod that is perpendicular to the outer wall of the arc-shaped clamp 2 and extends outward along the radial direction of the entire circle. In other embodiments, the handle 4 is not a straight rod, but a T-shaped rod, the end of which is easy for the operator to hold.

[0033] In the above embodiments, the handle 4 is a straight rod that is perpendicular to the outer wall of the arc-shaped clamp 2 and extends outward along the radial direction of the entire circle. In other embodiments, the handle 4 includes a straight rod and a ring connected to the end of the straight rod. The ring is designed to facilitate the operator's grip.

[0034] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the 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 without creative effort, or make equivalent substitutions for some technical features, or organically combine different types of specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tool for fastening the packing gland of a gate valve, characterized in that: It includes two arc-shaped clamps and a key. Both ends of the two arc-shaped clamps are fixed with connectors. The two arc-shaped clamps are fastened together by the connectors to form a complete circle. The inner wall of the arc-shaped clamps is provided with several keyways. The shape and size of the hole formed by the keyways and the stress groove opened on the packing gland are adapted to the key. A handle is fixed on the outer surface of the arc-shaped clamps.

2. The stop valve packing gland fastening tool according to claim 1, characterized in that: The connector is a connecting ear plate, and two arc-shaped clamps are fastened together by bolts and nuts passing through the connecting ear plate to form the complete circle.

3. The stop valve packing gland fastening tool according to claim 1, characterized in that: In a set of connectors used for fastening together, one connector has a slot and the other connector has a block that slides and engages with the slot.

4. The stop valve packing gland fastening tool according to claim 3, characterized in that: In a set of connectors used for fastening together, one connector has a dovetail groove and the other connector has a dovetail block that slides and engages with the dovetail groove.

5. The stop valve packing gland fastening tool according to claim 3, characterized in that: In a set of connectors used for fastening together, one connector has a T-groove and the other connector has a T-block that slides and engages with the T-groove.

6. The shut-off valve packing gland fastening tool according to any one of claims 1 to 5, characterized in that: The keyways are evenly distributed circumferentially on the inner wall surface of the arc-shaped retainer.

7. The stop valve packing gland fastening tool according to claim 6, characterized in that: The inner wall surface of the arc-shaped retainer is provided with at least three keyways.

8. The shut-off valve packing gland fastening tool according to any one of claims 1 to 5, characterized in that: The handle is a straight rod that is perpendicular to the outer wall of the arc-shaped clamp and extends outward along the radial direction of the entire circle.

9. The shut-off valve packing gland fastening tool according to any one of claims 1 to 5, characterized in that: The keyway is a square groove that runs longitudinally through the arc-shaped retainer so that the hole is a square hole that runs longitudinally through the retainer; or, the keyway is a square groove so that the hole is a square hole, and the bottom of the keyway is provided with a protrusion extending along the radial direction of the entire circle.

10. The shut-off valve packing gland fastening tool according to any one of claims 1 to 5, characterized in that: The inner wall of the arc-shaped clamp is provided with a soft protective layer.

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