A clamp type butterfly valve

Abstract

The utility model discloses a clamp formula butterfly valve, including butterfly valve main part, the outer wall intercommunication of butterfly valve main part has the installation cylinder, the inside rotation of installation cylinder is connected with valve stem, the valve stem is hollow structure and is provided with movable block in the inside, the outer wall fixed connection of valve stem has a plurality of slide cylinder, and the part of slide bar protruding valve stem gradually lengthens to can adjust through the multiple slide bar of extension, and the rotation valve stem is more convenient, and is more laborsaving, and after adjusting, can twist screw rod reverse rotation again to drive movable block to move down, and in the movable block moving down process, because the spring is arranged between slide bar and slide cylinder, thereby under the spring elasticity makes multiple slide bar reset, thereby makes slide bar most all withdraws to the inside of valve stem, makes the volume of valve stem whole smaller, thereby can effectively prevent the rotation of valve stem due to external object or manpower, uses more safe.

Description

Technical Field

[0001] This utility model relates to the technical field of clamp-type butterfly valves, specifically a clamp-type butterfly valve. Background Technology

[0002] Clamped butterfly valves are industrial products used in engineering systems to regulate and cut off the flow of various corrosive and non-corrosive fluid media in pipelines. A speed reducer is added to the valve stem to stop the butterfly plate at any position, improving the valve's operating performance. Clamped butterfly valves have a large nominal diameter, and the valve body is made of carbon steel, resulting in higher costs. The valve plate's sealing ring uses a metal ring instead of a rubber ring.

[0003] Existing clamp butterfly valves are operated by external personnel who adjust the handle to rotate the valve stem and butterfly plate. However, to facilitate the rotation of the handle, the handle is usually large and exposed, making it easy for external objects or people to bump into it, causing the handle to move or rotate slightly. To avoid the above situation, some clamp butterfly valves have a handle design that is smaller, making it more difficult for operators to rotate the handle. The handle size cannot be adjusted according to the usage situation, making it inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to provide a clamp-type butterfly valve, which has the characteristics of simple structure, convenient operation, and can effectively prevent the valve stem from rotating due to external objects or human force, making it safer to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamp-type butterfly valve, comprising a butterfly valve body, an installation cylinder connected to the outer wall of the butterfly valve body, a valve stem rotatably connected inside the installation cylinder, the valve stem being a hollow structure with a movable block inside, multiple sliding cylinders fixedly connected to the outer wall of the valve stem, sliding rods movably connected inside the multiple sliding cylinders, and a stop block abutting against the outer wall of the movable block fixedly connected to one end of each of the multiple sliding rods, a screw rotatably connected to the bottom end of the valve stem, and the movable block being threadedly connected to the outer wall of the screw.

[0006] In order to keep the upper end face of the valve stem flat, as a preferred embodiment of the clamp-type butterfly valve of this utility model, the upper end face of the valve stem is provided with a groove, and the top end of the screw extends into the interior of the groove and is fixedly connected to a knob.

[0007] In order to drive the slide rod to move inward, as a preferred embodiment of the clamp-type butterfly valve of this utility model, a spring sleeved on the outer wall of the slide rod is provided between the abutment block and the slide cylinder.

[0008] In order to limit the movement of the movable block, as a preferred embodiment of the clamp-type butterfly valve of this utility model, two limiting rods are fixedly connected to the inner bottom end of the valve stem, and the movable block is slidably connected to the outer wall of the limiting rods.

[0009] In order to push the pressing block to move by the movable block, as a preferred embodiment of the clamp-type butterfly valve of this utility model, the movable block has a frustum-shaped structure, and the pressing block has an arc-shaped structure with an inner side that matches the outer wall of the movable block.

[0010] To make it easier to rotate the valve stem, in a preferred embodiment of the clamp-type butterfly valve of this utility model, the number of the slide rod and the stop block are both four.

[0011] To prevent the slide rod from rotating circumferentially, the slide rod, as a preferred embodiment of the clamp-type butterfly valve of this utility model, has a square cross-section.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] When valve adjustment is needed, the screw is rotated by turning the knob, which in turn moves the movable block on the outer wall of the screw up and down. When the movable block moves upward, because the movable block has a frustum-shaped structure, it presses the slide rod outward, and the part of the slide rod protruding from the valve stem gradually extends. This allows for adjustment through multiple extended slide rods, making it easier and less strenuous to turn the valve stem. After adjustment, the screw can be turned in the opposite direction, causing the movable block to move downward. During the downward movement of the movable block, a spring is installed between the slide rod and the slide cylinder, which causes multiple slide rods to return to their original positions under the spring force. This allows most of the slide rods to retract into the valve stem, reducing the overall size of the valve stem. This effectively prevents the valve stem from rotating due to external objects or human force, making it safer to use. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional view of the valve stem of this utility model;

[0016] Figure 3 This is a top view of the valve stem structure of this utility model;

[0017] Figure 4 This is a partial top view of the structure of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the block of this utility model.

[0019] In the diagram: 1. Butterfly valve body; 2. Mounting cylinder; 3. Valve stem; 4. Moving block; 5. Slide cylinder; 6. Slide rod; 7. Stop block; 8. Spring; 9. Screw; 10. Groove; 11. Knob; 12. Limit rod. Detailed Implementation

[0020] Please see Figures 1 to 5 A clamp-type butterfly valve includes a butterfly valve body 1, an installation cylinder 2 connected to the outer wall of the butterfly valve body 1, a valve stem 3 rotatably connected inside the installation cylinder 2, the valve stem 3 having a hollow structure and a movable block 4 inside, a plurality of sliding cylinders 5 fixedly connected to the outer wall of the valve stem 3, sliding rods 6 movably connected inside the plurality of sliding cylinders 5, and a stop block 7 fixedly connected to the opposite end of the plurality of sliding rods 6, which abuts against the outer wall of the movable block 4, a screw 9 rotatably connected to the bottom inside the valve stem 3, and the movable block 4 threadedly connected to the outer wall of the screw 9.

[0021] In this embodiment, the valve stem 3 is rotatably connected inside the mounting cylinder 2 and its bottom end extends into the butterfly valve and connects to the valve plate. This facilitates the valve plate rotation via the valve stem 3, enabling valve size adjustment. When valve adjustment is required, the screw 9 is rotated via the knob 11, which in turn moves the movable block 4 on the outer wall of the screw 9 up and down. When the movable block 4 moves upward, its frustum-shaped structure presses the slide rod 6 outward, causing the portion of the slide rod 6 protruding from the valve stem 3 to gradually extend. This allows for adjustment via multiple extended slide rods 6, making valve stem 3 rotation more convenient and effortless. After adjustment, the screw 9 can be turned in the opposite direction, causing the movable block 4 to move downward. During the downward movement of the movable block 4, a spring 8 is installed between the slide rod 6 and the sliding cylinder 5. The spring force of the spring 8 resets multiple slide rods 6, causing most of the slide rods 6 to retract into the valve stem 3. This reduces the overall volume of the valve stem 3, effectively preventing rotation due to external objects or human intervention, thus enhancing safety.

[0022] As a technical optimization of this utility model, a groove 10 is provided on the upper end face of the valve stem 3, and the top end of the screw 9 extends into the interior of the groove 10 and is fixedly connected to a knob 11.

[0023] In this embodiment: the knob 11 is used to drive the screw 9 to rotate, thereby facilitating the adjustment of the position of the movable block 4. The knob 11 is located inside the groove 10, so that the upper surface of the valve stem 3 is flatter and does not affect the rotation operation.

[0024] As a technical optimization of this utility model, a spring 8 is provided between the abutment 7 and the slide cylinder 5, which is sleeved on the outer wall of the slide rod 6.

[0025] In this embodiment: by setting a spring 8, the elastic force of the spring 8 is used to drive the slide bar 6 to reset, making it easy to retract the slide bar 6.

[0026] As a technical optimization of this utility model, two limiting rods 12 are fixedly connected to the inner bottom end of the valve stem 3, and the movable block 4 is slidably connected to the outer wall of the limiting rods 12.

[0027] In this embodiment, the limiting rod 12 acts as a limit, causing the movable block 4 to move only vertically.

[0028] As a technical optimization of this utility model, the movable block 4 has a frustum-shaped structure, and the abutment block 7 has an arc-shaped structure with an inner side that matches the outer wall of the movable block 4.

[0029] In this embodiment: the movable block 4 has a frustum-shaped structure, the abutment block 7 has an arc-shaped structure and the inner side is an arc-shaped inclined surface that matches the outer wall of the movable block 4, so that the movable block 4 can press the slide rod 6 outward, and the part of the slide rod 6 protruding from the valve stem 3 gradually extends, so that it can be adjusted by multiple extended slide rods 6.

[0030] As a technical optimization of this utility model, the number of slide rods 6 and stop blocks 7 are both four.

[0031] In this embodiment, there are four slide rods 6 and four stop blocks 7, which allows the valve rod 3 to be rotated, making adjustment more convenient.

[0032] As a technical optimization of this utility model, the cross-section of the slide rod 6 is a square structure.

[0033] In this embodiment, the cross-section of the slide rod 6 is a square structure, which limits the slide rod 6 and prevents circumferential rotation.

[0034] Working principle: The valve stem 3 is rotatably connected inside the mounting cylinder 2 and its bottom end extends into the butterfly valve and connects to the valve plate. This allows the valve plate to be rotated via the valve stem 3, thus adjusting the valve size. When valve adjustment is needed, the screw 9 is rotated via the knob 11, which in turn moves the movable block 4 on the outer wall of the screw 9 up and down. When the movable block 4 moves upward, it presses the slide rod 6 outward due to its frustum-shaped structure. The part of the slide rod 6 protruding from the valve stem 3 gradually extends, allowing adjustment through multiple extended slide rods 6. This makes rotating the valve stem 3 more convenient and less strenuous. After adjustment, the screw 9 can be turned in the opposite direction, causing the movable block 4 to move downward. During the downward movement of the movable block 4, the spring 8 between the slide rod 6 and the sliding cylinder 5 causes multiple slide rods 6 to return to their original positions under the elastic force of the spring 8. This allows most of the slide rods 6 to retract into the valve stem 3, reducing the overall size of the valve stem 3. This effectively prevents the valve stem 3 from rotating due to external objects or human intervention, making it safer to use.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 clamp-type butterfly valve, comprising a butterfly valve body (1), characterized in that: The outer wall of the butterfly valve body (1) is connected to the mounting cylinder (2), and the valve stem (3) is rotatably connected inside the mounting cylinder (2). The valve stem (3) is a hollow structure and has a movable block (4) inside. Multiple sliding cylinders (5) are fixedly connected to the outer wall of the valve stem (3). Sliding rods (6) are movably connected inside the multiple sliding cylinders (5). A stop block (7) that abuts against the outer wall of the movable block (4) is fixedly connected to the opposite end of the multiple sliding rods (6). A screw (9) is rotatably connected to the bottom of the valve stem (3). The movable block (4) is threadedly connected to the outer wall of the screw (9).

2. The clamp-type butterfly valve according to claim 1, characterized in that: The upper end face of the valve stem (3) is provided with a groove (10), and the top end of the screw (9) extends into the interior of the groove (10) and is fixedly connected to a knob (11).

3. The clamp-type butterfly valve according to claim 1, characterized in that: A spring (8) sleeved on the outer wall of the slide rod (6) is provided between the abutment (7) and the slide cylinder (5).

4. A clamp-type butterfly valve according to claim 1, characterized in that: Two limiting rods (12) are fixedly connected to the inner bottom of the valve stem (3), and the movable block (4) is slidably connected to the outer wall of the limiting rods (12).

5. A clamp-type butterfly valve according to claim 1, characterized in that: The movable block (4) has a frustum-shaped structure, and the abutment block (7) has an arc-shaped structure with an inner side that matches the outer wall of the movable block (4).

6. A clamp-type butterfly valve according to claim 1, characterized in that: The number of slide bars (6) and abutment blocks (7) is four each.

7. A clamp-type butterfly valve according to claim 1, characterized in that: The cross-section of the slide bar (6) is a square structure.

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