Gate valve

Abstract

The utility model relates to the technical field of valves, and discloses a gate valve which comprises a valve body, a middle cover is in bolted connection with the valve body, a support is in bolted connection with the middle cover, a valve rod is arranged in the valve body, a valve plate is arranged at the bottom end of the valve rod, valve seats are arranged on the left side and the right side of the valve plate, and the valve seat is arranged on the valve rod. The top end of the valve rod sequentially penetrates through the middle cover and the support and extends upwards, a hand wheel is arranged at the top end of the valve rod, and a limiting mechanism is arranged on the support. According to the gate valve, the limiting rod is pushed to slide along the inner wall of the limiting groove through the elastic force of the spring, so that the limiting rod is inserted into the hand wheel, the hand wheel is limited, the valve plate is locked, the structure is simple, operation is convenient, and on the contrary, the pressing plate is pressed to drive the limiting rod to move, the limiting rod slides along the inner wall of the limiting groove and compresses the spring; therefore, the limiting rod is separated from the hand wheel, the limitation on the hand wheel is relieved, the hand wheel can rotate, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gate valve. Background Technique

[0002] A gate valve is a closing member, i.e., a gate plate. The moving direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed. The gate valve is arranged on a water conveyance pipeline or other fluid pipelines. When it is necessary to intercept the fluid in the pipeline, usually, an operator rotates a handwheel manually to lower the gate plate to achieve pipeline interception.

[0003] However, the locking structure of the valve plate of the existing gate valve is relatively complex and inconvenient to operate. At the same time, after the height of the handwheel is adjusted, since it is fastened by a screw rod pressing, the handwheel is prone to sliding and the positioning effect is poor. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a gate valve. Its advantages are that the spring's own elastic force acts to push the limiting rod to slide along the inner wall of the limiting groove, so that the limiting rod is inserted into the handwheel, thereby limiting the handwheel, and further locking the valve plate. The structure is simple and the operation is convenient. On the contrary, by pressing the pressing plate to drive the limiting rod to move, the limiting rod slides along the inner wall of the limiting groove and compresses the spring, so that the limiting rod disengages from the handwheel, thereby releasing the limitation of the handwheel and enabling the handwheel to rotate, which is convenient to use.

[0005] To achieve the above object, the utility model provides the following technical solution: A gate valve, comprising a valve body, a middle cover is bolted to the valve body, a bracket is bolted to the middle cover, a valve rod is arranged in the valve body, a corrugated pipe is arranged on one side of the valve rod, a valve plate is arranged at the bottom end of the valve rod, valve seats are arranged on the left and right sides of the valve plate, the top end of the valve rod sequentially passes through the middle cover and the bracket and extends upward, a handwheel is arranged at the top end of the valve rod, and a limiting mechanism is arranged on the bracket;

[0006] The limiting mechanism includes: a limiting block, the limiting block is arranged on the outer wall of the bracket, a limiting groove is opened at the top of the limiting block, a limiting rod is slidably connected to the inner wall of the limiting groove, a spring is fixedly connected to the bottom end of the limiting rod, and the bottom end of the spring is fixedly connected to the inner wall of the limiting groove. The top end of the limiting rod is inserted into the handwheel. A pressing plate is fixedly connected to the outer wall of the limiting rod. The spring's own elastic force acts to push the limiting rod to slide along the inner wall of the limiting groove, so that the limiting rod is inserted into the handwheel, thereby limiting the handwheel, and further locking the valve plate. The structure is simple and the operation is convenient. On the contrary, by pressing the pressing plate to drive the limiting rod to move, the limiting rod slides along the inner wall of the limiting groove and compresses the spring, so that the limiting rod disengages from the handwheel, thereby releasing the limitation of the handwheel and enabling the handwheel to rotate, which is convenient to use.

[0007] Preferably, a limiting hole is formed in the top of the handwheel, and the limiting rod is inserted into the limiting hole.

[0008] Preferably, a fixing mechanism is arranged on the limiting block. The fixing mechanism comprises: a mounting groove which is formed in the inner wall of the limiting block, a fixing block which is slidably connected to the inner wall of the mounting groove, a screw rod which is threadedly connected to the outer wall of the limiting block, and the right end of the screw rod extends into the mounting groove and is rotatably connected to the left side of the fixing block. A locking nut is threadedly connected to the outer wall of the screw rod. By rotating the screw rod, the fixing block is driven to slide along the inner wall of the mounting groove, so that the fixing block is clamped and fixed on the bracket, and the screw rod is locked by the locking nut, which is convenient for the installation and fixation of the limiting block, and further convenient for adjusting the installation height of the limiting block according to the installation environment of the gate valve.

[0009] Preferably, the right side of the fixing block is arc-shaped and abuts against the outer wall of the bracket.

[0010] Preferably, there are two groups of the fixing mechanisms, and the two groups of fixing mechanisms are oppositely arranged on the left and right sides of the limiting block.

[0011] Preferably, a packing is arranged on the outer wall of the valve stem, a packing gland is arranged above the packing, an oil cup is arranged on the bracket, and lubricating oil is arranged in the oil cup. By arranging the oil cup, the threaded surface of the valve stem can be lubricated, so as to avoid the unsmooth rotation of the valve stem.

[0012] Compared with the prior art, the utility model provides a gate valve, which has the following beneficial effects:

[0013] 1. For this gate valve, the limiting rod is pushed to slide along the inner wall of the limiting groove by the elastic force of the spring itself, so that the limiting rod is inserted on the handwheel, thereby limiting the handwheel, and further locking the valve plate. The structure is simple and the operation is convenient. On the contrary, by pressing the pressing plate to drive the limiting rod to move, the limiting rod slides along the inner wall of the limiting groove and compresses the spring, so that the limiting rod is separated from the handwheel, thereby releasing the limitation on the handwheel and enabling the handwheel to rotate, which is convenient to use.

[0014] 2. For this gate valve, by rotating the screw rod to drive the fixing block to slide along the inner wall of the mounting groove, the fixing block is clamped and fixed on the bracket, and the screw rod is locked by the locking nut, which is convenient for the installation and fixation of the limiting block, and further convenient for adjusting the installation height of the limiting block according to the installation environment of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model, and do not constitute a limitation to the utility model. In the drawings:

[0016] Figure 1This is the perspective view of the present utility model;

[0017] Figure 2 This is the enlarged view at position A of the present utility model;

[0018] Figure 3 This is the front elevation sectional view of the limit block of the present utility model.

[0019] In the figure: 1, valve body; 2, middle cover; 3, bracket; 4, valve stem; 5, handwheel; 6, limit mechanism; 601, limit block; 602, limit groove; 603, limit rod; 604, spring; 605, pressing plate; 7, fixing mechanism; 701, installation groove; 702, fixing block; 703, screw; 704, locking nut; 8, packing gland; 9, oil cup. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Embodiment 1

[0022] As Figures 1 - 3As shown in the figure, the utility model provides a gate valve, which includes a valve body 1. A middle cover 2 is bolted to the valve body 1, and a bracket 3 is bolted to the middle cover 2. A valve stem 4 is arranged inside the valve body 1. A bellows is arranged on one side of the valve stem 4. A valve plate is arranged at the bottom end of the valve stem 4. Valve seats are arranged on the left and right sides of the valve plate. The top end of the valve stem 4 sequentially passes through the middle cover 2 and the bracket 3 and extends upward. A handwheel 5 is arranged at the top end of the valve stem 4. A limiting mechanism 6 is arranged on the bracket 3. The limiting mechanism 6 includes: a limiting block 601, which is arranged on the outer wall of the bracket 3. A limiting groove 602 is formed at the top of the limiting block 601. A limiting rod 603 is slidably connected to the inner wall of the limiting groove 602. A spring 604 is fixedly connected to the bottom end of the limiting rod 603, and the bottom end of the spring 604 is fixedly connected to the inner wall of the limiting groove 602. The top end of the limiting rod 603 is inserted into the handwheel 5. A limiting hole is formed at the top of the handwheel 5. The limiting rod 603 is inserted into the limiting hole. A pressing plate 605 is fixedly connected to the outer wall of the limiting rod 603. By the elastic force of the spring 604 itself, the limiting rod 603 is pushed to slide along the inner wall of the limiting groove 602, so that the limiting rod 603 is inserted into the handwheel 5, thereby limiting the handwheel 5, and further locking the valve plate. The structure is simple and the operation is convenient. On the contrary, by pressing the pressing plate 605 to drive the limiting rod 603 to move, the limiting rod 603 slides along the inner wall of the limiting groove 602 and compresses the spring 604, so that the limiting rod 603 is disengaged from the handwheel 5, thereby releasing the limitation on the handwheel 5 and enabling the handwheel 5 to rotate, which is convenient to use. A packing is arranged on the outer wall of the valve stem 4. A packing gland 8 is arranged above the packing. An oil cup 9 is arranged on the bracket 3. Lubricating oil is arranged inside the oil cup 9. By arranging the oil cup 9, the threaded surface of the valve stem 4 can be lubricated, thereby avoiding the poor rotation of the valve stem 4.

[0023] In this embodiment, by the elastic force of the spring 604 itself, the limiting rod 603 is pushed to slide along the inner wall of the limiting groove 602, so that the limiting rod 603 is inserted into the handwheel 5, thereby limiting the handwheel 5, and further locking the valve plate. The structure is simple and the operation is convenient. On the contrary, by pressing the pressing plate 605 to drive the limiting rod 603 to move, the limiting rod 603 slides along the inner wall of the limiting groove 602 and compresses the spring 604, so that the limiting rod 603 is disengaged from the handwheel 5, thereby releasing the limitation on the handwheel 5 and enabling the handwheel 5 to rotate, which is convenient to use.

[0024] Embodiment 2

[0025] As Figures 1 - 3As shown, based on Embodiment 1, the present utility model provides a technical solution: Preferably, a fixing mechanism 7 is provided on the limiting block 601. The fixing mechanism 7 includes: an installation groove 701, which is opened on the inner wall of the limiting block 601. A fixing block 702 is slidably connected to the inner wall of the installation groove 701. The right side of the fixing block 702 is arc-shaped and abuts against the outer wall of the bracket 3. A screw rod 703 is threadedly connected to the outer wall of the limiting block 601, and the right end of the screw rod 703 extends into the installation groove 701 and is rotatably connected to the left side of the fixing block 702. A locking nut 704 is threadedly connected to the outer wall of the screw rod 703. There are two groups of the fixing mechanisms 7, and the two groups of fixing mechanisms 7 are oppositely arranged on the left and right sides of the limiting block 601. By rotating the screw rod 703, the fixing block 702 is driven to slide along the inner wall of the installation groove 701, so that the fixing block 702 is clamped and fixed on the bracket 3, and the screw rod 703 is locked by the locking nut 704, which is convenient for the installation and fixation of the limiting block 601, and further convenient for adjusting the installation height of the limiting block 601 according to the installation environment of the gate valve.

[0026] In this embodiment, by rotating the screw rod 703, the fixing block 702 is driven to slide along the inner wall of the installation groove 701, so that the fixing block 702 is clamped and fixed on the bracket 3, and the screw rod 703 is locked by the locking nut 704, which is convenient for the installation and fixation of the limiting block 601, and further convenient for adjusting the installation height of the limiting block 601 according to the installation environment of the gate valve.

[0027] Next, the working principle of the gate valve will be specifically described.

[0028] As Figures 1 - 3 shown, when in use, the limiting block 601 is sleeved on the bracket 3. By rotating the screw rod 703, the fixing block 702 is driven to slide along the inner wall of the installation groove 701, so that the fixing block 702 is clamped and fixed on the bracket 3, and the screw rod 703 is locked by the locking nut 704, thereby fixing the limiting block 601 on the bracket 3. By rotating the handwheel 5, the valve stem 4 is driven to rotate to open or close the gate valve. Under the action of the elastic force of the spring 604 itself, the limiting rod 603 is pushed to slide along the inner wall of the limiting groove 602, so that the limiting rod 603 is inserted into the handwheel 5, thereby limiting the handwheel 5, and further locking the valve plate. On the contrary, by pressing the pressing plate 605, the limiting rod 603 is driven to move. The limiting rod 603 slides along the inner wall of the limiting groove 602 and compresses the spring 604, so that the limiting rod 603 is disengaged from the handwheel 5, thereby releasing the limitation on the handwheel 5 and enabling the handwheel 5 to rotate.

[0029] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A gate valve, comprising a valve body (1), characterized in that: The valve body (1) is bolted to a middle cover (2), the middle cover (2) is bolted to a bracket (3), a valve stem (4) is arranged in the valve body (1), a valve plate is arranged at the bottom end of the valve stem (4), valve seats are arranged on the left and right sides of the valve plate, the top end of the valve stem (4) passes through the middle cover (2) and the bracket (3) in sequence and extends upward, a hand wheel (5) is arranged at the top end of the valve stem (4), and a limiting mechanism (6) is arranged on the bracket (3); the limiting mechanism (6) comprises: a limiting block (601), the limiting block (601) is arranged on the outer wall of the bracket (3), a limiting groove (602) is provided on the top of the limiting block (601), the inner wall of the limiting groove (602) is slidably connected to the limiting rod (603), and the bottom end of the limiting rod (603) is fixedly connected to a spring (60 4), and the bottom end of the spring (604) is fixedly connected to the inner wall of the limiting groove (602), the top end of the limiting rod (603) is plugged into the hand wheel (5), and the outer wall of the limiting rod (603) is fixedly connected to a pressure plate (605); the limiting block (601) is provided with a fixing mechanism (7), and the fixing mechanism (7) comprises: a mounting groove (701), the mounting groove (701) is opened on the inner wall of the limiting block (601), the inner wall of the mounting groove (701) is slidably connected to the fixing block (702), the outer wall of the limiting block (601) is threadedly connected to a screw rod (703), and the right end of the screw rod (703) extends into the mounting groove (701) and is rotatably connected to the left side of the fixing block (702), and the outer wall of the screw rod (703) is threadedly connected to a locking nut (704).

2. A gate valve according to claim 1, characterized in that: A limiting hole is provided on the top of the hand wheel (5), and the limiting rod (603) is inserted into the limiting hole.

3. A gate valve according to claim 1, characterized in that: The right side of the fixing block (702) is arranged in an arc shape and abuts against the outer wall of the bracket (3).

4. A gate valve according to claim 1, characterized in that: There are two groups of the fixing mechanisms (7), and the two groups of the fixing mechanisms (7) are arranged relatively on the left and right sides of the limiting block (601).

5. A gate valve according to claim 1, characterized in that: A packing is provided on the outer wall of the valve stem (4), a packing gland (8) is provided above the packing, and an oil cup (9) is provided on the bracket (3).

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