Pin butterfly valve with safety protection piece

Abstract

The utility model discloses a pin butterfly valve with a safety protection piece, which comprises a valve body, a mounting rod and a valve plate, the valve body and the valve plate are respectively provided with a mounting port and a connecting groove which correspond to the mounting rod, a cavity is arranged in the mounting rod, a lifting block is arranged in the cavity through a stabilizing mechanism, and the safety protection piece is arranged in the cavity. A positioning block is arranged on the outer wall of the mounting rod through a storage groove, the positioning block is connected with the lifting block through a contact mechanism, a positioning groove corresponding to the positioning block is formed in the inner wall of the connecting groove, an operation groove is formed in the outer wall of the mounting rod, and a lifting frame extending into the cavity and connected with the lifting block is arranged in the operation groove. According to the utility model, the mounting rod is connected with the valve plate, so that the disassembly is convenient, the valve can be conveniently stored, overhauled, maintained or replaced, the maintenance cost is reduced, the service life is prolonged, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a pin butterfly valve with a safety protection piece. Background Technique

[0002] The butterfly valve mainly consists of a valve body, a valve stem, a butterfly plate and a sealing member, etc. The butterfly plate is in a disc shape, connected by the valve stem, and rotates in the valve body to realize the opening and closing of the valve. Its structure is compact, occupies a small space and has a relatively light weight.

[0003] In the existing butterfly valves, the valve plate and the rotating assembly are connected by pins. The connection methods of the pins are mainly simple insertion connection, welding or fixed connection. The pin is simply inserted into the corresponding hole and connected by friction or interference fit. However, in the long-term use, due to vibration, fluid pressure change, etc., the pin is likely to loosen or shift. And because there is no additional positioning or locking structure, the position of the pin is unstable after installation, making it difficult to ensure the accurate connection and relative position of each component of the valve. Some pins are fixedly connected to the valve components by welding, etc. Although the connection is firm, it is extremely difficult when disassembly and repair, replacement or cleaning are required. Welding may also damage the material structure of the components, affecting the strength and service life. Disassembly requires professional cutting equipment and techniques, increasing the maintenance cost and time. In order to improve it, a pin butterfly valve with a safety protection piece is proposed here. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a pin butterfly valve with a safety protection piece is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A pin butterfly valve with a safety protection piece, comprising a valve body, a mounting rod and a valve plate. The valve body and the valve plate are respectively provided with mounting ports and connecting grooves corresponding to the mounting rod. A cavity is arranged inside the mounting rod. A lifting block is arranged in the cavity through a stabilizing mechanism. A positioning block is arranged on the outer wall of the mounting rod through a receiving groove. The positioning block is connected to the lifting block through a contact mechanism. A positioning groove corresponding to the positioning block is arranged on the inner wall of the connecting groove. An operation groove is arranged on the outer wall of the mounting rod. A lifting frame extending into the cavity and connected to the lifting block is arranged in the operation groove.

[0007] Preferably, the stabilizing mechanism includes a stabilizing rod installed on the bottom wall of the cavity, and a stabilizing groove corresponding to the stabilizing rod is arranged at the bottom of the lifting block.

[0008] Preferably, the contact mechanism includes a connecting rod connected to the positioning block and extending into the cavity. The connecting rod is in sliding contact with the lifting block.

[0009] Preferably, a first spring is provided in the stabilizing groove, and two ends of the first spring are elastically connected to the outer wall of the stabilizing rod and the inner wall of the stabilizing groove respectively.

[0010] Preferably, an extension plate is installed at the bottom of the connecting rod, and a second spring is elastically connected between the outer wall of the extension plate and the inner wall of the cavity.

[0011] Preferably, a protective piece is provided at the bottom wall of the operation groove through a hidden groove, and a third spring is elastically connected between the outer wall of the protective piece and the bottom wall of the hidden groove.

[0012] Preferably, two gripping rods are installed on the mounting rod, and the surfaces of the connecting rod and the lifting block in contact with each other are both inclined.

[0013] Advantages of the present utility model:

[0014] 1. The three-section design of the mounting rod is accurately connected to the valve body and the valve plate. The stabilizing mechanism ensures the stable movement of the lifting block. The cooperation of the positioning block and the positioning groove makes the connection firm, ensures the stable rotation position of the valve plate, and ensures the sealing and reliable operation of the valve.

[0015] 2. The gripping rods facilitate the operation of rotating the valve plate. The operation groove and the lifting frame facilitate controlling the lifting block to realize the connection and disconnection between the mounting rod and the valve plate. The protective piece prevents impurities from entering the operation groove and is convenient to operate.

[0016] 3. The connection between the mounting rod and the valve plate is convenient for disassembly, which is convenient for storing, repairing, maintaining or replacing the valve, reduces the maintenance cost, and improves the service life and reliability. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a pin butterfly valve with a safety protection piece proposed by the present utility model;

[0018] Figure 2 is a schematic structural diagram of components such as the mounting rod;

[0019] Figure 3 is a schematic vertical sectional structure diagram of the valve plate;

[0020] Figure 4 is a schematic vertical sectional structure diagram of the mounting rod;

[0021] Figure 5 is Figure 4 an enlarged schematic diagram of the structure at A of

[0022] Figure 6 is Figure 4 an enlarged schematic diagram of the structure at B of

[0023] In the figure: 1 valve body, 2 mounting port, 3 mounting rod, 4 gripping rod, 5 valve plate, 6 connecting groove, 7 positioning groove, 8 cavity, 9 lifting block, 10 lifting frame, 11 stabilizing rod, 12 stabilizing groove, 13 storage groove, 14 positioning block, 15 connecting rod, 16 extension plate, 17 operation groove, 18 hidden groove, 19 protective piece. Detailed implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Refer to Figures 1-6 , a pin butterfly valve with a safety protection piece, including a valve body 1, a mounting rod 3 and a valve plate 5. As shown in the figure, the mounting rod 3 has a three-section design and different outer shapes. The lowermost part is square-shaped to connect with the connecting groove 6 which is also square-shaped. The middle part is a thicker cylindrical shape to correspond to the mounting port 2 which is also circular-shaped. The upper part is a thinner cylindrical shape, different from the middle and lower parts.

[0026] Two gripping rods 4 are installed on the mounting rod 3. The gripping rods 4 are convenient for gripping, so as to drive the mounting rod 3 to rotate. In this solution, there is also a device component for restricting the mounting rod 3 that is not drawn. It can limit the mounting rod 3 after it rotates, so as to ensure the stability of the position of the valve plate 5 after rotation. For example, rotating the valve plate 5 can open or close it, and the use of the above-mentioned restricting device component in the prior art can ensure the stability of the open and closed states.

[0027] The valve body 1 and the valve plate 5 are respectively provided with a mounting port 2 and a connecting groove 6 corresponding to the mounting rod 3. The mounting rod 3 is internally provided with a cavity 8. A lifting block 9 is arranged in the cavity 8 through a stabilizing mechanism. A positioning block 14 is arranged on the outer wall of the mounting rod 3 through a storage groove 13. The positioning block 14 is connected to the lifting block 9 through a contact mechanism. A positioning groove 7 corresponding to the positioning block 14 is arranged on the inner wall of the connecting groove 6. An operation groove 17 is arranged on the outer wall of the mounting rod 3. An elevator 10 extending into the cavity 8 and connected to the lifting block 9 is arranged in the operation groove 17.

[0028] The stabilizing mechanism includes a stabilizing rod 11 installed on the bottom wall of the cavity 8. The bottom of the lifting block 9 is provided with a stabilizing groove 12 corresponding to the stabilizing rod 11. The stabilizing rod 11 is located in the stabilizing groove 12, which can ensure the stability of the lifting block 9 when moving up and down in the cavity 8 and prevent phenomena such as trajectory deviation.

[0029] The contact mechanism includes an adapter rod 15 connected to the positioning block 14 and extending into the cavity 8, and the adapter rod 15 is in sliding contact with the lifting block 9. The surfaces of the adapter rod 15 and the lifting block 9 in contact with each other are both inclined. Only by designing like this can the adapter rod 15, the extension plate 16 and the positioning block 14 have horizontal displacement when the lifting block 9 has vertical displacement.

[0030] A first spring is provided in the stable groove 12, and the two ends of the first spring are elastically connected to the outer wall of the stable rod 11 and the inner wall of the stable groove 12 respectively. The first spring is not drawn in the figure, and it can be easily imagined where it is installed through the statement description. Its function is to ensure that the lifting block 9 is stable at the height in the cavity 8 without external force intervention.

[0031] An extension plate 16 is installed at the bottom of the adapter rod 15, and a second spring is elastically connected between the outer wall of the extension plate 16 and the inner wall of the cavity 8. Similarly, the second spring is not drawn in the figure, and it can be easily imagined where it is installed through the statement description. Its function is that when the lifting block 9 has vertical displacement, the compressed second spring will reset, so as to drive the adapter rod 15 to move in cooperation with the extension plate 16, so that the adapter rod 15 and the lifting block 9 are always in contact with each other.

[0032] A protective piece 19 is provided at the inner bottom wall of the operation groove 17 through a hidden groove 18, and a third spring is elastically connected between the outer wall of the protective piece 19 and the inner bottom wall of the hidden groove 18. Similarly, the third spring is not drawn in the figure, and it can be easily imagined where it is installed through the statement description. Its function is to push up the protective piece 19 without external force intervention to block the notch of the operation groove 17.

[0033] When the present utility model is in use, as shown in the figure, the valve plate 5 is in the valve body 1, the lower part of the mounting rod 3 is in the connection groove 6, and the positioning block 14 is in the positioning groove 7. By grasping the rod 4, the mounting rod 3 can be rotated, so as to drive the valve plate 5 to rotate, realizing the opening and closing of the valve body 1.

[0034] The lower part of the mounting rod 3 functions as a pin, which can be connected to the connection groove 6 and is also easy to disengage. Its disengagement steps are as follows: pull down the protective piece 19 to compress the third spring and descend into the hidden groove 18. At this time, the notch of the operation groove 17 is opened. At this time, lift the lifting frame 10, and the lifting frame 10 can drive the lifting block 9 to rise in the cavity 8. As the lifting block 9 rises, the second spring will recover, so it will squeeze the extension plate 16, and drive the adapter rod 15 to move by means of the extension plate 16. The two adapter rods 15 will move closer, so the positioning blocks 14 at the other ends of the adapter rods 15 will move at this time. The positioning blocks 14 can enter the storage groove 13 for storage. Therefore, the positioning blocks 14 will disengage from the positioning grooves 7, and then the connection between the mounting rod 3 and the valve plate 5 will be released, and the above components can be disassembled, so as to facilitate their storage, maintenance, repair or replacement, etc.

[0035] The above is only the preferred specific embodiment 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 of the present utility model and its inventive concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A pin butterfly valve with a safety protection piece, comprising a valve body (1), a mounting rod (3) and a valve plate (5), characterized in that, The valve body (1) and the valve plate (5) are respectively provided with an installation port (2) corresponding to the installation rod (3) and a connection groove (6). A cavity (8) is provided inside the installation rod (3). A lifting block (9) is arranged in the cavity (8) through a stabilizing mechanism. A positioning block (14) is arranged on the outer wall of the installation rod (3) through a receiving groove (13). The positioning block (14) is connected to the lifting block (9) through a contact mechanism. A positioning groove (7) corresponding to the positioning block (14) is arranged on the inner wall of the connection groove (6). An operation groove (17) is arranged on the outer wall of the installation rod (3). A lifting frame (10) extending into the cavity (8) and connected to the lifting block (9) is arranged in the operation groove (17).

2. The pin butterfly valve with a safety protection piece according to claim 1, characterized in that, The stabilizing mechanism includes a stabilizing rod (11) installed on the inner bottom wall of the cavity (8). A stabilizing groove (12) corresponding to the stabilizing rod (11) is arranged at the bottom of the lifting block (9).

3. The pin butterfly valve with a safety protection piece according to claim 2, characterized in that, The contact mechanism includes a connecting rod (15) connected to the positioning block (14) and extending into the cavity (8). The connecting rod (15) is in sliding contact with the lifting block (9).

4. The pin butterfly valve with a safety protection piece according to claim 3, characterized in that, A first spring is arranged in the stabilizing groove (12). Two ends of the first spring are elastically connected to the outer wall of the stabilizing rod (11) and the inner wall of the stabilizing groove (12) respectively.

5. A pin butterfly valve with a safety protection piece according to claim 4, characterized in that, An extension plate (16) is installed at the bottom of the connecting rod (15). A second spring is elastically connected between the outer wall of the extension plate (16) and the inner wall of the cavity (8).

6. A pin butterfly valve with a safety protection piece according to claim 5, characterized in that, A protective piece (19) is arranged on the inner bottom wall of the operation groove (17) through a hidden groove (18). A third spring is elastically connected between the outer wall of the protective piece (19) and the inner bottom wall of the hidden groove (18).

7. A pin butterfly valve with a safety protection piece according to claim 6, characterized in that, Two gripping rods (4) are installed on the installation rod (3). The surfaces of the connecting rod (15) and the lifting block (9) in contact with each other are both inclined.

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