A connecting device for a removable gate valve

Abstract

The utility model discloses a detachable gate valve's connecting device, specifically relates to the gate valve field, including the valve body, and the fluid passage and the gate passage are opened in the valve body, and the both sides of gate passage are equipped with two symmetrical sealing rings, and sealing ring and valve body fixedly connected, and the sliding connection of gate passage has the gate board, and the top of gate board is equipped with the gate lever, and the fixed connection of gate lever has the threaded rod, and the fixed connection of the bottom of gate lever has the lock head, and the fixed connection of lock head outside has the location cover, and the sliding connection of lock head in has the pull rod, and the fixed connection of pull rod one end close threaded rod has the locking sleeve, and the sliding connection of locking sleeve and lock head has a plurality of butterfly spring board. The utility model discloses the pre-tightening force of butterfly spring drive elastic clamp sleeve along the radial expansion of taper surface, realize the fixed between valve rod and gate board, cooperate eccentric axle rotation, realize quick dismounting, significantly shorten the system downtime, and the loss and comprehensive maintenance cost that because production interruption brought are reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and more specifically, to a connection device for a detachable gate valve. Background Technology

[0002] A gate valve is a type of valve that controls the flow of fluid by raising and lowering a gate. Its opening and closing element is a gate parallel to the channel. The main characteristics of a gate valve are low fluid resistance and good sealing performance. It is suitable for fully open or fully closed operating conditions. The connection device of a detachable gate valve usually adopts a flange connection or threaded connection structure. Its core function is to realize the quick disassembly and assembly of the valve body and the pipeline, which is convenient for maintenance, replacement or adjustment of valve components.

[0003] Traditional gate valves often use T-slots or integral connection structures for the gate and stem. When the gate or sealing ring needs to be replaced due to normal wear or media erosion, the valve body must be completely disassembled to access the internal components such as the gate. During the entire maintenance period, the process pipeline where the valve is located must be completely shut down, directly causing production interruption. This long downtime, coupled with high labor costs and huge economic losses caused by production stoppage, makes the maintenance of traditional gate valves a costly burden, which seriously restricts the operational efficiency and economic benefits of continuous production enterprises.

[0004] In summary, to simplify the maintenance process of gate valves, it is necessary to address the problem that the fixed connection structure between the gate and the valve stem of the gate valve leads to long downtime for equipment maintenance, which seriously affects the operating efficiency of continuous production processes and results in high maintenance costs. The goal is to enable the gate valve to quickly replace internal parts without disassembling it. Utility Model Content

[0005] The present invention provides a detachable gate valve connection device, which aims to solve the problem that the traditional gate valve has a fixed connection structure between the gate and the valve stem, resulting in long equipment maintenance downtime, which seriously affects the operating efficiency of continuous production processes and has high maintenance costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a detachable gate valve connection device, comprising a valve body, a fluid channel and a gate channel within the valve body, two symmetrical sealing rings on both sides of the gate channel, the sealing rings being fixedly connected to the valve body, a gate plate being slidably connected within the gate channel, a gate rod being provided above the gate plate, a threaded rod being fixedly connected to the gate rod, a lock head being fixedly connected to the bottom of the gate rod, a positioning sleeve being fixedly connected to the outside of the lock head, a pull rod being slidably connected within the lock head, a locking sleeve being fixedly connected to the end of the pull rod near the threaded rod, several butterfly springs being slidably connected between the locking sleeve and the lock head, a pressure plate being fixedly connected to the end of the pull rod away from the threaded rod, an elastic sleeve being fixedly connected to the pressure plate, the elastic sleeve being slidably connected between the lock head and the butterfly springs, the contact surface between the lock head and the elastic sleeve having a certain taper, a lock hole being provided on the gate plate, the lock hole being movably connected to the elastic sleeve.

[0007] In a preferred embodiment, an eccentric spindle is rotatably connected to the lock head, a cylindrical pin is slidably connected inside the lock head, a spacer is fixedly connected to the end of the cylindrical pin away from the eccentric spindle, the spacer is slidably connected between the lock head and the butterfly spring, and the spacer is movably connected to the elastic sleeve.

[0008] In a preferred embodiment, a fixing ring is fixedly connected to the gate arm, and two symmetrical guide rods are fixedly connected to both sides of the fixing ring.

[0009] In a preferred embodiment, two symmetrical guide sleeves are fixedly connected to the gate plate, the guide sleeves and the guide rod are slidably connected, and a guide block is fixedly connected to the gate plate.

[0010] In a preferred embodiment, a guide groove is provided in the valve body, and the guide groove and the guide block are slidably connected.

[0011] In a preferred embodiment, a cover plate is bolted to the valve body, and a sealing gasket is provided between the cover plate and the valve body.

[0012] In a preferred embodiment, a bracket is fixedly connected to the cover plate, a nut is rotatably connected to the top of the bracket, the bracket and the threaded rod are slidably connected, and the nut and the threaded rod are threadedly connected.

[0013] In a preferred embodiment, a handwheel is fixedly connected to the nut portion, the handwheel and the threaded rod are slidably connected, and a locking nut is fixedly connected to the handwheel.

[0014] The beneficial effects of this utility model are as follows: 1. This utility model uses the preload of a butterfly spring to drive the elastic sleeve to expand radially along the conical surface, thereby fixing the valve stem and the gate. Combined with the rotation of the eccentric spindle, it enables quick disassembly. This allows maintenance personnel to quickly pull out the entire valve stem and gate assembly directly from above the valve body without removing the valve from the pipeline or disassembling the valve body. This significantly shortens system downtime and greatly reduces losses and overall maintenance costs caused by production interruptions.

[0015] 2. This utility model achieves pre-positioning of the lock head and lock hole before they are engaged by the cooperation of the guide rod and guide sleeve. It effectively guides and constrains the movement trajectory of the lock head, enabling it to automatically and accurately align with the lock hole on the gate plate. This avoids collisions and damage caused by positional deviations between the lock head and the gate plate hole edge, protects the precision of the key mating surfaces, and lays a solid foundation for the smooth engagement and efficient and reliable connection of the subsequent locking mechanism. It greatly improves the operating experience and assembly efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the valve body structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the gate arm structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the lock head structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the tie rod structure of this utility model.

[0022] The attached figures are labeled as follows: 1. Valve body; 101. Fluid passage; 102. Gate passage; 103. Guide groove; 2. Gate plate; 201. Lock hole; 3. Gate rod; 4. Threaded rod; 5. Lock head; 6. Positioning sleeve; 7. Pull rod; 8. Locking sleeve; 9. Butterfly spring; 10. Pressure plate; 11. Elastic sleeve; 12. Eccentric spindle; 13. Cylindrical pin; 14. Spacer; 15. Fixing ring; 16. Guide rod; 17. Guide sleeve; 18. Guide block; 19. Cover plate; 20. Sealing gasket; 21. Bracket; 22. Nut part; 23. Handwheel; 24. Locking nut; 25. Sealing ring. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Refer to the instruction manual appendix Figures 1 to 6 A detachable gate valve connection device includes a valve body 1, with a fluid passage 101 and a gate passage 102 inside the valve body 1. Two symmetrical sealing rings 25 are provided on both sides of the gate passage 102, and the sealing rings 25 are fixedly connected to the valve body 1. A gate plate 2 is slidably connected inside the gate passage 102. A gate rod 3 is provided above the gate plate 2, and a threaded rod 4 is fixedly connected to the gate rod 3. A locking head 5 is fixedly connected to the bottom of the gate rod 3, and a positioning sleeve 6 is fixedly connected to the outside of the locking head 5. A threaded rod 4 is slidably connected inside the locking head 5. A pull rod 7 is fixedly connected to a locking sleeve 8 at one end near the threaded rod 4. Several butterfly springs 9 are slidably connected between the locking sleeve 8 and the lock head 5. A pressure plate 10 is fixedly connected to the other end of the pull rod 7 away from the threaded rod 4. An elastic sleeve 11 is fixedly connected to the pressure plate 10. The elastic sleeve 11 is slidably connected between the lock head 5 and the butterfly springs 9. The contact surface between the lock head 5 and the elastic sleeve 11 has a certain taper. A lock hole 201 is opened on the gate plate 2. The lock hole 201 and the elastic sleeve 11 are movably connected.

[0025] It should be noted that the bottom outer side of the lock head 5 is designed with a conical surface, which is installed at the bottom of the gate arm 3. As a shell, it houses the pull rod 7, locking sleeve 8, and butterfly spring 9. The locking sleeve 8 is located at the top of the pull rod 7, serving as the upward support point for the butterfly spring 9. The pressure plate 10 is located at the bottom of the pull rod 7. As the pull rod 7 moves upward, and the inner side of the elastic sleeve 11 has a conical surface that cooperates with the outer conical surface of the lock head 5, in the locked state, the butterfly spring 9 provides a pre-tension force, causing the pull rod 7 to be continuously pulled upward, thus driving its... The pressure plate 10 at the bottom moves upward together. Since the elastic sleeve 11 is sleeved on the outside of the lock head 5, when the pressure plate 10 moves upward, it will squeeze the bottom of the elastic sleeve 11, forcing it to slide upward along the conical surface of the lock head 5 and open radially outward (expand). The opened elastic sleeve 11 tightly hugs the inner wall of the lock hole 201, thereby firmly locking the entire gate arm 3 and the gate plate 2 together. The inner diameter of the lock hole 201 is slightly larger than the outer diameter of the elastic sleeve 11 in its natural state, but smaller than its outer diameter when it is open.

[0026] Another embodiment based on gate arm 3: the way gate arm 3 is fixedly installed on threaded rod 4 can be improved to a detachable installation structure. Specifically, gate arm 3 can be installed on threaded rod 4 by means of mechanical quick-release buckle, which can quickly disassemble gate arm 3 and threaded rod 4, making it convenient to replace or repair gate arm 3 or threaded rod 4 separately.

[0027] Refer to the instruction manual appendix Figure 6 An eccentric shaft 12 is rotatably connected to the lock head 5, and a cylindrical pin 13 is slidably connected inside the lock head 5. A spacer 14 is fixedly connected to the end of the cylindrical pin 13 away from the eccentric shaft 12. The spacer 14 is slidably connected between the lock head 5 and the butterfly spring 9, and the spacer 14 is movably connected to the elastic sleeve 11.

[0028] It should be noted that the rotation axis of the eccentric shaft 12 is perpendicular to the sliding axis of the cylindrical pin 13. When the eccentric shaft 12 is rotated, the eccentric section of the eccentric shaft 12 presses down on the cylindrical pin 13. The cylindrical pin 13 moves downward, pushing the spacer 14 to move downward. The spacer 14 directly presses down on the upper end face of the elastic sleeve 11. This downward force is transmitted through the elastic sleeve 11 and overcomes the upward pulling force of the butterfly spring 9, forcing the entire pull rod 7 to move downward together, thereby relieving the upward squeezing action of the pressure plate 10 from the bottom of the elastic sleeve 11.

[0029] Refer to the instruction manual appendix Figure 5 A fixing ring 15 is fixedly connected to the gate arm 3, and two symmetrical guide rods 16 are fixedly connected to both sides of the fixing ring 15.

[0030] It should be noted that the guide rod 16 consists of two symmetrical rods fixed on both sides of the fixing ring 15, and is installed parallel to the axis of the gate arm 3.

[0031] Refer to the instruction manual appendix Figure 4 Two symmetrical guide sleeves 17 are fixedly connected to the gate plate 2. The guide sleeves 17 and the guide rod 16 are slidably connected. A guide block 18 is fixedly connected to the gate plate 2.

[0032] It should be noted that the two symmetrical guide sleeves 17 are used to guide the movement of the guide rod 16, restrict the guide rod 16 to move only in the vertical direction, and enable the lock head 5 to be initially aligned with the lock hole 201.

[0033] Another embodiment based on guide sleeve 17: A magnetic ring is added to guide sleeve 17, and guide rod 16 is made of magnetic material. When performing the initial positioning and guidance of gate 2, the magnetic ring in guide sleeve 17 and guide rod 16 can be used for auxiliary adjustment, so that guide rod 16 can be quickly aligned with guide sleeve 17 without repeated adjustment.

[0034] Refer to the instruction manual appendix Figure 2 The valve body 1 has a guide groove 103 inside, and the guide groove 103 and the guide block 18 are slidably connected.

[0035] It should be noted that the guide groove 103 is opened on the side wall of the gate channel 102 and is parallel to the movement direction of the gate plate 2, providing a special and precise sliding track for the guide block 18 on the gate plate 2.

[0036] Refer to the instruction manual appendix Figure 3 A cover plate 19 is fixedly connected to the valve body 1 by bolts, and a sealing gasket 20 is provided between the cover plate 19 and the valve body 1.

[0037] It should be noted that the cover plate 19 is located on the gate passage 102 of the valve body 1 and is sealed by the intermediate sealing gasket 20, together forming part of the valve pressure-bearing housing to ensure static sealing at this location.

[0038] Refer to the instruction manual appendix Figure 3 A bracket 21 is fixedly connected to the cover plate 19. A nut 22 is rotatably connected to the top of the bracket 21. The bracket 21 and the threaded rod 4 are slidably connected, and the nut 22 and the threaded rod 4 are threadedly connected.

[0039] It should be noted that the bracket 21 contains a precision-machined hole that mates with the threaded rod 4, allowing the threaded rod 4 to move freely up and down within the bracket 21, but preventing the threaded rod 4 from wobbling radially.

[0040] Refer to the instruction manual appendix Figure 3 A handwheel 23 is fixedly connected to the nut part 22. The handwheel 23 and the threaded rod 4 are slidably connected. A locking nut 24 is fixedly connected to the handwheel 23.

[0041] It should be noted that the handwheel 23 is a wheel-shaped operating component, which is mounted on the nut part 22. The spoke design of the handwheel 23 provides a lever arm, allowing the operator to generate a large torque with a small force to drive the nut part 22 to rotate.

[0042] Working principle: During normal operation, turning the handwheel 23 drives the nut part 22 to rotate on top of the bracket 21. Since the nut part 22 is threadedly connected to the threaded rod 4, the rotational motion is converted into the synchronous linear descent or elevation of the threaded rod 4 and the gate rod 3. At this time, the gate plate 2 and the gate rod 3 are firmly fixed. When fixing, the guide sleeves 17 on both sides of the gate plate 2 slide and engage with the guide rod 16. Then, the lock head 5 is initially positioned in the lock hole 201 of the gate plate 2 through the positioning sleeve 6 on its outer side. Then, under the pre-tightening force provided by the butterfly spring 9, the pull rod 7 is pulled upward, driving the pressure plate 10 to move upward together. The pressure plate 10 then squeezes the bottom of the elastic sleeve 11 sleeved on the outer conical surface of the lock head 5, forcing the elastic sleeve 11 to move upward along the conical surface and open radially outward, thereby tightly gripping the lock hole 201 of the gate plate 2. On the inner wall, the gate stem 3 and the gate plate 2 are firmly connected. At the same time, the guide block 18 on the gate plate 2 is slidably connected to the guide groove 103 opened in the valve body 1, which ensures that the gate plate 2 makes stable and precise linear movement in the gate passage 102 of the valve to open or close the fluid passage 101, and is sealed by the sealing ring 25. When the gate plate 2 needs to be disassembled, the eccentric spindle 12 on the lock head 5 is rotated, and its eccentric section presses the cylindrical pin 13 downward, pushing the spacer 14 to directly squeeze the upper end face of the elastic sleeve 11. This downward force overcomes the tension of the butterfly spring 9, forcing the pull rod 7 to move down, releasing the pressure plate 10 from the bottom of the elastic sleeve 11. The elastic sleeve 11 contracts and disengages from the lock hole 201, so that the entire valve stem system can be pulled out from the valve body cavity 1 sealed by the cover plate 19 and the sealing gasket 20, and the disassembly is completed.

[0043] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A connection device for a detachable gate valve, characterized in that: The valve includes a valve body (1), which has a fluid passage (101) and a gate passage (102). Two symmetrical sealing rings (25) are provided on both sides of the gate passage (102). The sealing rings (25) are fixedly connected to the valve body (1). A gate plate (2) is slidably connected inside the gate passage (102). A gate rod (3) is provided above the gate plate (2). A threaded rod (4) is fixedly connected to the gate rod (3). A lock head (5) is fixedly connected to the bottom of the gate rod (3). A positioning sleeve (6) is fixedly connected to the outside of the lock head (5). A pull rod (7) is slidably connected inside the lock head (5). 7) A locking sleeve (8) is fixedly connected to one end of the threaded rod (4). Several butterfly springs (9) are slidably connected between the locking sleeve (8) and the lock head (5). A pressure plate (10) is fixedly connected to one end of the pull rod (7) away from the threaded rod (4). An elastic sleeve (11) is fixedly connected to the pressure plate (10). The elastic sleeve (11) is slidably connected between the lock head (5) and the butterfly springs (9). The contact surface between the lock head (5) and the elastic sleeve (11) has a certain taper. A lock hole (201) is opened on the gate plate (2). The lock hole (201) and the elastic sleeve (11) are movably connected.

2. The connection device for a detachable gate valve according to claim 1, characterized in that: An eccentric spindle (12) is rotatably connected to the lock head (5), and a cylindrical pin (13) is slidably connected inside the lock head (5). A spacer (14) is fixedly connected to the end of the cylindrical pin (13) away from the eccentric spindle (12). The spacer (14) is slidably connected between the lock head (5) and the butterfly spring (9). The spacer (14) is movably connected to the elastic sleeve (11).

3. The connection device for a detachable gate valve according to claim 1, characterized in that: A fixing ring (15) is fixedly connected to the gate arm (3), and two symmetrical guide rods (16) are fixedly connected to both sides of the fixing ring (15).

4. The connection device for a detachable gate valve according to claim 3, characterized in that: Two symmetrical guide sleeves (17) are fixedly connected to the gate (2). The guide sleeves (17) and the guide rod (16) are slidably connected. A guide block (18) is fixedly connected to the gate (2).

5. The connection device for a detachable gate valve according to claim 4, characterized in that: A guide groove (103) is provided inside the valve body (1), and the guide groove (103) and the guide block (18) are slidably connected.

6. The connection device for a detachable gate valve according to claim 1, characterized in that: A cover plate (19) is fixedly connected to the valve body (1) by bolts, and a sealing gasket (20) is provided between the cover plate (19) and the valve body (1).

7. The connection device for a detachable gate valve according to claim 6, characterized in that: A bracket (21) is fixedly connected to the cover plate (19). A nut (22) is rotatably connected to the top of the bracket (21). The bracket (21) and the threaded rod (4) are slidably connected. The nut (22) and the threaded rod (4) are threadedly connected.

8. The connection device for a detachable gate valve according to claim 7, characterized in that: A handwheel (23) is fixedly connected to the nut part (22), and the handwheel (23) and the threaded rod (4) are slidably connected. A locking nut (24) is fixedly connected to the handwheel (23).

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