Multifunctional gate valve with valve rod anti-fracture protection structure

Abstract

The utility model relates to the technical field of multifunctional gate valve discloses a multifunctional gate valve with valve rod anti -break protection structure, including valve body, both sides of valve body all are fixedly connected with second flange block, one side of second flange block is provided with first flange block, one side fixedly connected with connecting pipe of first flange block, be provided with bolt between second flange block with first flange block, one side fixedly connected with second conical block of bolt, the other end of bolt is connected with nut with screw thread, one side fixedly connected with first conical block of nut, the spring is equipped with outside bolt, in the utility model, through the close adhesion of flange that conical block extrusion expands tightly cover realizes, cooperate the elastic thrust and clearance compensation effect of spring, effectively resist the influence that medium flow and equipment vibration bring, avoid the connection slack, guarantee the long -term reliable operation of gate valve connecting portion.

Description

Technical Field

[0001] This utility model relates to the field of multifunctional gate valve technology, and in particular to a multifunctional gate valve with a valve stem anti-breakage protection structure. Background Technology

[0002] Addressing the technical pain point that traditional gate valves are prone to gate flutter due to medium impact and pressure differential fluctuations in the semi-open throttling state, which can lead to valve stem wear and breakage and sealing surface damage, this multi-functional gate valve with a valve stem anti-breakage protection structure has emerged. It is widely used in many industries with stringent valve reliability requirements, such as petroleum, petrochemical, chemical, power, water conservancy, urban construction, and fire protection. It is also suitable for working conditions containing slurry and corrosive media, such as mining, papermaking, and environmental water treatment. The multi-functional gate valve with stem fracture protection structure includes an anti-vibration seat fixed to the inner wall of the central cavity, a piston buffer mechanism and a guiding rolling mechanism symmetrically arranged on the anti-vibration seat, and a piston buffer mechanism with built-in elastic elements, piston elements and rolling elements, working in conjunction with a square sleeve fitted around the outer circumference of the valve stem. It also integrates auxiliary structures such as a flow channel, a check mechanism and a flexible floating outlet valve seat, forming a comprehensive protection system. Its core function is to effectively suppress gate chatter and excessive offset through the close rolling of the rolling elements and the square sleeve, the buffering and vibration reduction of the elastic elements, and the limiting mechanism assisted by the medium pressure, thereby reducing sealing surface wear and lowering maintenance costs. In existing technologies, flange connections mostly rely on a single fastener for fixation, lacking elastic compensation and gap filling mechanisms. They are easily loosened by media flow and equipment vibration, resulting in insufficient sealing reliability and poor durability, which can easily lead to leakage risks. At the same time, traditional gate valves do not have an effective stress dispersion structure for the valve stem, which is prone to bending and breaking under torque and media pressure. Insufficient transmission accuracy also leads to poor stability of gate valve on / off and flow regulation, resulting in insufficient overall operational reliability. Therefore, a multifunctional gate valve with a valve stem anti-breakage protection structure is proposed to solve the above problems. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a multifunctional gate valve with a stem anti-breakage protection structure, aiming to improve the problem of easy loosening of the valve body and pipeline connection in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multifunctional gate valve with a valve stem anti-breakage protection structure, comprising a valve body, wherein a second flange block is fixedly connected to both sides of the valve body, a first flange block is provided on one side of the second flange block, a connecting pipe is fixedly connected to one side of the first flange block, a bolt is provided between the second flange block and the first flange block, a second conical block is fixedly connected to one side of the bolt, a nut is threaded to the other end of the bolt, a first conical block is fixedly connected to one side of the nut, a spring is sleeved on the outside of the bolt, and a tightening sleeve is provided on the outside of the second conical block and the first conical block.

[0005] As a further description of the above technical solution: A fixing component is fixedly connected to the top of the valve body, and a threaded rod is threadedly connected to the inner side of the fixing component. A handle is rotatably connected between the fixing components, and a valve ball is fixedly connected to the bottom end of the threaded rod. A reinforcing rib is provided on the inner side of the threaded rod.

[0006] As a further description of the above technical solution: The spring is located between the second conical block and the first conical block.

[0007] As a further description of the above technical solution: The nut is located on one side of the first flange block, and the expansion sleeve is located inside the second flange block and the first flange block.

[0008] As a further description of the above technical solution: The valve ball is located inside the valve body, and the threaded rod is threaded to the inside of the handle.

[0009] As a further description of the above technical solution: The spring is located inside the expansion sleeve.

[0010] This utility model has the following beneficial effects: 1. In this utility model, the flange is tightly fitted by the conical block pressing the expansion sleeve. Combined with the elastic thrust of the spring and the gap compensation effect, it effectively resists the influence of medium flow and equipment vibration, avoids loosening of the connection, and ensures the long-term reliable operation of the gate valve connection.

[0011] 2. In this utility model, the stress generated by the force on the valve stem is dispersed through the coordinated design of the reinforcing rib and the transmission structure, reducing the bending deformation of the valve stem caused by torque and medium pressure, thus solving the problem of easy breakage of the valve stem from the root cause. At the same time, it ensures the precise controllability of the gate valve opening and closing and flow regulation, and improves the overall operational stability. Attached Figure Description

[0012] Figure 1This is a three-dimensional schematic diagram of a multifunctional gate valve with a stem anti-breakage protection structure proposed in this utility model; Figure 2 This is a schematic diagram of the valve ball of a multifunctional gate valve with a valve stem anti-breakage protection structure proposed in this utility model; Figure 3 This is a schematic diagram of the expansion sleeve of a multifunctional gate valve with a stem anti-breakage protection structure proposed in this utility model; Figure 4 This is a schematic diagram of the structure of the second cone block of a multifunctional gate valve with a stem anti-breakage protection structure proposed in this utility model. Figure 5 This is a schematic diagram of the threaded stem of a multifunctional gate valve with a stem breakage protection structure proposed in this utility model.

[0013] Legend: 1. Valve body; 2. Fixing component; 3. Handle; 4. Threaded rod; 5. First flange block; 6. Bolt; 7. Nut; 8. Connecting pipe; 9. Valve ball; 10. Expansion sleeve; 11. First conical block; 12. Second conical block; 13. Spring; 14. Second flange block; 15. Reinforcing rib. Detailed Implementation

[0014] 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.

[0015] Reference Figures 1-3 An embodiment of this utility model provides a multifunctional gate valve with a stem anti-breakage protection structure, comprising a valve body 1, with second flange blocks 14 fixedly connected to both sides of the valve body 1, a first flange block 5 provided on one side of the second flange block 14, a connecting pipe 8 fixedly connected to one side of the first flange block 5, a bolt 6 provided between the second flange block 14 and the first flange block 5, a second conical block 12 fixedly connected to one side of the bolt 6, a nut 7 threadedly connected to the other end of the bolt 6, a first conical block 11 fixedly connected to one side of the nut 7, a spring 13 sleeved on the outside of the bolt 6, and a tightening sleeve 10 provided on the outside of the second conical block 12 and the first conical block 11.

[0016] Tightening the nut 7 causes the first conical block 11 to move along the bolt 6 toward the second conical block 12. At the same time, the spring 13 generates elastic deformation under pressure to provide auxiliary thrust, causing the two conical blocks to synchronously squeeze the expansion sleeve 10 toward the middle. After being subjected to the radial pressure of the conical blocks, the expansion sleeve 10 expands outward and is tightly locked in the inner gap between the second flange block 14 and the first flange block 5, thereby enhancing the connection and fixing effect between the two flanges and effectively preventing the connection from loosening due to medium flow or equipment vibration.

[0017] Reference Figures 1-3 A fixing part 2 is fixedly connected to the top of the valve body 1. A threaded rod 4 is threadedly connected to the inner side of the fixing part 2. A handle 3 is rotatably connected between the fixing parts 2. A valve ball 9 is fixedly connected to the bottom of the threaded rod 4. A reinforcing rib 15 is provided on the inner side of the threaded rod 4.

[0018] When the handle 3 is turned, the handle 3 drives the threaded rod 4 to move up and down along the threaded trajectory of the fixing part 2 through the internal thread transmission. During the movement, the threaded rod 4 drives the valve ball 9 at the bottom to rise and fall synchronously. When the valve ball 9 rises, the flow channel inside the valve body 1 is opened, and the medium can pass through the valve body 1 smoothly. When the valve ball 9 falls to the preset position inside the valve body 1, the flow channel is closed to achieve the shut-off function. The reinforcing rib 15 on the inner side of the threaded rod 4 can disperse the stress generated by the threaded rod 4 during the force process, reduce the bending deformation of the threaded rod 4 caused by torque or medium pressure, and thus play a role in protecting the valve rod from breakage.

[0019] Reference Figures 1-3 Spring 13 is located between the second conical block 12 and the first conical block 11.

[0020] When the nut 7 is tightened to bring the two conical blocks closer together, the spring 13 is compressed and stores elastic potential energy, providing a continuous squeezing force to the conical blocks, ensuring that the expansion sleeve 10 can obtain a stable expansion pressure. At the same time, if slight loosening occurs during subsequent use, the elastic restoring force of the spring 13 can compensate for the gap in time, maintain the squeezing state of the conical blocks on the expansion sleeve 10, and ensure the long-term stability of the flange connection.

[0021] Reference Figures 1-3 Nut 7 is located on one side of the first flange block 5, and expansion sleeve 10 is located inside the second flange block 14 and the first flange block 5.

[0022] Nut 7, as a force-adjusting component, achieves position adjustment through threaded engagement with bolt 6, providing moving power for the first conical block 11. Meanwhile, the expansion sleeve 10 is located inside the two flanges, which can accurately fill the gap between the flange connection surfaces. After expansion, it fits tightly against the inner wall of the flange to form surface-to-surface contact, increasing the friction of the connection surface, further improving the fixing effect, and preventing relative displacement of the connection parts.

[0023] Reference Figures 1-3 The valve ball 9 is located inside the valve body 1, and the threaded rod 4 is threadedly connected to the inside of the handle 3.

[0024] The valve ball 9 is located on the flow path inside the valve body 1, directly contacting the medium and controlling the opening and closing of the channel through its own lifting and lowering. The threaded connection design between the threaded rod 4 and the handle 3 allows the rotational movement of the handle 3 to be smoothly converted into the linear lifting and lowering movement of the threaded rod 4, ensuring that the movement trajectory of the valve ball 9 is accurate and controllable, and avoiding problems such as poor sealing or jamming caused by transmission deviation.

[0025] Reference Figures 1-3 Spring 13 is located inside the tension sleeve 10.

[0026] The spring 13 provides centering and pressure compensation for the conical block inside the expansion sleeve 10. When the conical block is squeezed towards the center, the elastic force of the spring 13 can make the two conical blocks bear force evenly, avoiding excessive pressure on one side and causing uneven expansion of the expansion sleeve 10. At the same time, the presence of the spring 13 can buffer the vibration during equipment operation, reduce the impact damage between the conical block and the expansion sleeve 10, and extend the service life of the entire connection mechanism.

[0027] Working principle: Rotating handle 3 drives threaded rod 4 to move up and down along the threaded trajectory of fixed part 2 via internal thread transmission. Simultaneously, threaded rod 4 drives valve ball 9 at its bottom to rise and fall inside valve body 1. When valve ball 9 rises, it opens the flow channel for medium passage; when it descends to the preset position, it closes the channel to achieve shut-off. The reinforcing rib 15 on the inner side of threaded rod 4 disperses stress, reducing bending deformation caused by torque or medium pressure, protecting the valve stem from breakage. Simultaneously, tightening nut 7 drives the first conical block 11 to move along bolt 6 towards the second conical block 12 on the side of the second flange block 14, fitting onto bolt 6. The spring 13, located on the outer side between the two conical blocks and inside the expansion sleeve 10, undergoes elastic deformation under pressure, providing continuous auxiliary thrust and compensating for subsequent slight loosening through the reset force. This causes the two conical blocks to press the expansion sleeve 10 towards the center, and the expansion sleeve 10 expands outward under radial pressure, tightly locking into the gap between the inner sides of the two flanges, filling the gap between the connecting surfaces and forming a tight surface-to-surface contact. This increases friction and prevents the connection from loosening. The spring 13 also centers and positions the conical blocks, ensuring uniform force distribution, buffering equipment vibration, reducing impact damage to components, and extending the service life of the connection mechanism. All components work together to achieve the stable on / off function of the gate valve.

[0028] 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 multifunctional gate valve with a stem breakage protection structure, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to two sides of a second flange block (14). A first flange block (5) is provided on one side of the second flange block (14). A connecting pipe (8) is fixedly connected on one side of the first flange block (5). A bolt (6) is provided between the second flange block (14) and the first flange block (5). A second conical block (12) is fixedly connected on one side of the bolt (6). A nut (7) is threaded to the other end of the bolt (6). A first conical block (11) is fixedly connected on one side of the nut (7). A spring (13) is sleeved on the outside of the bolt (6). An expansion sleeve (10) is provided on the outside of the second conical block (12) and the first conical block (11).

2. A multifunctional gate valve with a stem breakage protection structure according to claim 1, characterized in that: The valve body (1) is fixedly connected to a fixing member (2) at the top. A threaded rod (4) is threadedly connected to the inner side of the fixing member (2). A handle (3) is rotatably connected between the fixing members (2). A valve ball (9) is fixedly connected to the bottom end of the threaded rod (4). A reinforcing rib (15) is provided on the inner side of the threaded rod (4).

3. A multifunctional gate valve with a stem breakage protection structure according to claim 1, characterized in that: The spring (13) is located between the second conical block (12) and the first conical block (11).

4. A multifunctional gate valve with a stem breakage protection structure according to claim 1, characterized in that: The nut (7) is located on one side of the first flange block (5), and the expansion sleeve (10) is located inside the second flange block (14) and the first flange block (5).

5. A multifunctional gate valve with a stem breakage protection structure according to claim 2, characterized in that: The valve ball (9) is located inside the valve body (1), and the threaded rod (4) is threaded to the inside of the handle (3).

6. A multifunctional gate valve with a stem breakage protection structure according to claim 1, characterized in that: The spring (13) is located inside the expansion sleeve (10).

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