Diaphragm valve device

Abstract

Disclosed is a diaphragm valve device, comprising a main body (1), and a first channel (2), a second channel (3) and an orifice (4) which are arranged on the main body (1), the first channel (2) and the second channel (3) being communicated through the orifice (4). The main body (1) is provided with a diaphragm (5) at the orifice (4) for opening and closing the orifice (4), and an open / close driving mechanism (6) for driving the diaphragm (5) to open and close. The open / close driving mechanism comprises a push-pull rod (61), a lever (62) and an open / close driving assembly (63) arranged on the main body (1), one end of the lever (62) being swingingly connected to the main body (1), the other end thereof being swingingly connected to the driving end of the open / close driving assembly (63), and the middle portion thereof being connected to the diaphragm (5) by means of the push-pull rod (61). The diaphragm valve device has the advantages of requiring small driving force, lower power consumption and low cost, etc.

Description

A diaphragm valve device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on and claims priority to a Chinese patent application with an application date of "December 13, 2023", application number "202311715397.8", and invention name "A diaphragm valve device". The full text of the Chinese patent application is hereby cited in this application as a part of this application. Technical Field

[0003] The present invention relates to the technical field of liquid transportation, and in particular to a diaphragm valve device. Background Art

[0004] Existing diaphragm valves generally include a valve body, a diaphragm arranged in the valve body, and a driving mechanism for driving the diaphragm to move. The driving mechanism generally includes a valve stem and a linear driving assembly. The linear driving assembly is connected to the diaphragm through the valve stem to drive the diaphragm to move and realize the opening and closing of the valve body.

[0005] The existing diaphragm valve has the following deficiencies:

[0006] 1) Using a linear drive assembly to drive the diaphragm requires large driving force, high power consumption, and high cost;

[0007] 2) Only the part of the diaphragm connected to the valve stem is stressed, and the overall stress is uneven, which makes it easy to be damaged and has a short service life. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a diaphragm valve device which requires little driving force, consumes little power and has low cost.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A diaphragm valve device includes a main body and a first channel, a second channel and a valve port provided on the main body, the first channel and the second channel are connected through the valve port, the main body is provided with a diaphragm for opening and closing the valve port and an opening and closing drive mechanism for driving the diaphragm to open and close at the valve port, the opening and closing drive mechanism includes a push-pull rod, a lever and an opening and closing drive assembly provided on the main body, one end of the lever is swingably connected to the main body, the other end is swingably connected to the drive end of the opening and closing drive assembly, and the middle part is connected to the diaphragm through the push-pull rod.

[0011] As a further improvement of the above technical solution:

[0012] The driving end of the opening and closing driving component is provided with a first swing hole, and the main body is provided with a second swing hole. One end of the lever is swingably matched with the first swing hole, and the other end is swingably matched with the second swing hole.

[0013] A slider is provided at the driving end of the opening and closing driving component. The slider is slidably arranged on the main body. The first swing hole is arranged on the slider.

[0014] The push-pull rod is rotatably connected to the lever.

[0015] Two levers are provided, and a rotating shaft is provided on the push-pull rod. Both ends of the rotating shaft are rotatably connected to the two levers respectively.

[0016] The two levers are symmetrically arranged with the connection point of the rotating shaft and the push-pull rod as the center.

[0017] The push-pull rod is slidably arranged on the main body.

[0018] The diaphragm and the main body form an oil cavity.

[0019] A sealing sleeve is provided between the push-pull rod and the main body.

[0020] The outer end surface of the valve port is provided with a matching surface for convex-concave matching with the push-pull rod.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] The diaphragm valve device of the present invention, when closed: the opening and closing drive assembly drives the lever to swing forward, driving the push-pull rod to move toward the valve port, so that the diaphragm fits against the outer end surface of the valve port, thereby blocking the first channel and the second channel from each other, achieving closure. When opened: the opening and closing drive assembly drives the lever to swing backward, driving the push-pull rod to move away from the valve port, so that the diaphragm is separated from the outer end surface of the valve port, thereby connecting the first channel and the second channel to each other, achieving opening. This diaphragm valve device realizes the opening and closing of the valve port by driving the push-pull rod and diaphragm to move through the lever, requiring low driving force, low power consumption, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of the diaphragm valve device of the present invention in an open state.

[0024] FIG2 is a schematic structural diagram of the diaphragm valve device of the present invention in a closed state.

[0025] FIG3 is an enlarged view of point A in FIG2 .

[0026] FIG4 is a diagram showing the coordination of the main body, slider, and lever of the diaphragm valve device of the present invention.

[0027] The numbers in the figure represent:

[0028] 1. Main body; 2. First channel; 3. Second channel; 4. Valve port; 41. Mating surface; 5. Diaphragm; 6. Opening and closing drive mechanism; 61. Push-pull rod; 611. Rotating shaft; 612. Sealing sleeve; 62. Lever; 63. Opening and closing drive assembly; 64. Slider; 7. First swing hole; 8. Second swing hole; 9. Oil chamber. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0032] In the present invention, unless otherwise expressly specified or limited, the term "connection" and other terms should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Figures 1 to 4 show an embodiment of a diaphragm valve device of the present invention. The diaphragm valve device of this embodiment includes a main body 1 and a first channel 2, a second channel 3 and a valve port 4 provided on the main body 1. The first channel 2 and the second channel 3 are connected through the valve port 4. The main body 1 is provided with a diaphragm 5 for opening and closing the valve port 4 and an opening and closing drive mechanism 6 for driving the diaphragm 5 to open and close at the valve port 4. The opening and closing drive mechanism 6 includes a push-pull rod 61, a lever 62 and an opening and closing drive assembly 63 provided on the main body 1. One end of the lever 62 is swingably connected to the main body 1, the other end is swingably connected to the driving end of the opening and closing drive assembly 63, and the middle part is connected to the diaphragm 5 through the push-pull rod 61.

[0034] When closed: the opening and closing drive assembly 63 drives the lever 62 to swing forward, driving the push-pull rod 61 to move toward the valve port 4, so that the diaphragm 5 fits against the outer end surface of the valve port 4, thereby cutting off the first channel 2 and the second channel 3 to achieve closure.

[0035] When opening: the opening and closing drive assembly 63 drives the lever 62 to swing in the opposite direction, driving the push-pull rod 61 to move away from the valve port 4, so that the diaphragm 5 is separated from the outer end surface of the valve port 4, thereby making the first channel 2 and the second channel 3 conductive with each other and realizing opening.

[0036] The diaphragm valve device drives the push-pull rod 61 and the diaphragm 5 to move through the lever 62 to realize the opening and closing of the valve port 4, requires small driving force, has low power consumption and low cost.

[0037] Furthermore, in this embodiment, the driving end of the opening and closing drive assembly 63 is provided with a first pivoting hole 7, and the main body 1 is provided with a second pivoting hole 8. One end of the lever 62 swings in engagement with the first pivoting hole 7, while the other end swings in engagement with the second pivoting hole 8. The position where the lever 62 swings in engagement with the first pivoting hole 7 is the center of its swing, and the opening and closing drive assembly 63 drives the lever 62 to swing up and down about the center. Preferably, both the first pivoting hole 7 and the second pivoting hole 8 are larger than the end of the lever 62 that engages with them.

[0038] Furthermore, in this embodiment, the driving end of the opening and closing drive assembly 63 is provided with a slider 64, the slider 64 is slidably provided on the main body 1, and the first swing hole 7 is provided on the slider 64. The opening and closing drive assembly 63 transmits linear motion through the slider 64, and the motion transmission is smooth.

[0039] Furthermore, in this embodiment, the push-pull rod 61 is rotatably connected to the lever 62. Specifically, the push-pull rod 61 is rotatably connected to the middle portion of the lever 62.

[0040] Furthermore, in this embodiment, as shown in Figure 4 , two levers 62 are provided, and a rotating shaft 611 is provided on the push-pull rod 61. The two ends of the rotating shaft 611 are rotatably connected to the two levers 62, respectively. Of course, a single lever 62 is also possible. Two levers 62 are provided, and the two levers 62 are symmetrically arranged around the connection point between the rotating shaft 611 and the push-pull rod 61. Furthermore, to meet movement requirements, a connecting hole with a larger outer diameter than the rotating shaft 611 can be provided on the push-pull rod 61, so that the rotating shaft 611 and the connecting hole rotatably engage.

[0041] Furthermore, in this embodiment, the push-pull rod 61 is slidably provided on the main body 1. The push-pull rod 61 is slidably provided on the main body 1, which can improve the movement stability.

[0042] Furthermore, in this embodiment, the diaphragm 5 and the main body 1 form an oil chamber 9. The volume of the oil chamber 9 remains consistent during the reciprocating motion of the push-pull rod 61, so that the diaphragm 5 is evenly stressed and its service life is increased.

[0043] Furthermore, in this embodiment, a sealing sleeve 612 is provided between the push-pull rod 61 and the main body 1, so that the hydraulic oil in the oil chamber 9 can operate at high pressure for a long time without leakage.

[0044] Furthermore, in this embodiment, the outer end surface of the valve port 4 is provided with a mating surface 41 for convex-concave engagement with the push-pull rod 61. When closed, the mating surface 41 of the valve port 4 and the push-pull rod 61 engage in a convex-concave engagement to clamp the diaphragm 5, preventing circumferential slippage of the diaphragm 5 (the diaphragm 5 is generally made of a flexible material, such as plastic, which is prone to creep under stress). This reduces friction caused by the circumferential position of the diaphragm 5 during the closing process, further extending its service life and improving the sealing performance of the closure.

[0045] Furthermore, the mating surface 41 may be an annular lower concave surface with a concave center portion. In this case, the corresponding surface of the push-pull rod 61 and the mating surface 41 is an annular lower convex surface with a convex center portion. Of course, in other embodiments, the mating surface 41 may be an annular upper convex surface with a convex center portion. In this case, the corresponding surface of the push-pull rod 61 and the mating surface 41 is an annular upper concave surface with a concave center portion.

[0046] Features: Diaphragm structure, high sanitation level; corrugated push rod, with sealed PTFE sleeve, ensures long-term high-pressure operation of hydraulic oil in the oil chamber without leakage; the oil chamber volume remains consistent during the reciprocating motion of the push rod, which ensures ultra-long diaphragm life; the new structure has a small overall volume; the annular sealing structure requires less sealing pressure; the lever mechanism form a labor-saving structure that can adapt to smaller cylinders;

[0047] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A diaphragm valve device, comprising a main body (1), a first channel (2), a second channel (3) and a valve port (4) provided on the main body (1), wherein the first channel (2) and the second channel (3) are communicated through the valve port (4), and the main body (1) is provided with a diaphragm (5) for opening and closing the valve port (4) and an opening and closing driving mechanism (6) for driving the diaphragm (5) to open and close at the valve port (4), characterized in that: The opening and closing drive mechanism (6) includes a push-pull rod (61), a lever (62), and an opening and closing drive assembly (63) provided on the main body (1). One end of the lever (62) is swingably connected to the main body (1), the other end is swingably connected to the drive end of the opening and closing drive assembly (63), and the middle part is connected to the diaphragm (5) through the push-pull rod (61).

2. The diaphragm valve device according to claim 1, characterized in that: A first swing connection hole (7) is provided at the drive end of the opening and closing drive assembly (63), a second swing connection hole (8) is provided on the main body (1), one end of the lever (62) is swingably engaged with the first swing connection hole (7), and the other end is swingably engaged with the second swing connection hole (8).

3. The diaphragm valve device according to claim 2, characterized in that: A slider (64) is provided at the drive end of the opening and closing drive assembly (63), the slider (64) is slidably arranged on the main body (1), and the first swing connection hole (7) is provided on the slider (64).

4. The diaphragm valve device according to claim 2, characterized in that: The push-pull rod (61) is rotatably connected to the lever (62).

5. The diaphragm valve device according to claim 1, characterized in that: There are two levers (62), a rotating shaft (611) is provided on the push-pull rod (61), and both ends of the rotating shaft (611) are respectively rotatably connected to the two levers (62).

6. The diaphragm valve device according to claim 5, characterized in that: The two levers (62) are symmetrically arranged with the connection point of the rotating shaft (611) and the push-pull rod (61) as the center.

7. The diaphragm valve device according to any one of claims 1 to 6, characterized in that: The push-pull rod (61) is slidably arranged on the main body (1).

8. The diaphragm valve device according to claim 7, characterized in that: An oil chamber (9) is formed between the diaphragm (5) and the main body (1).

9. The diaphragm valve device according to claim 8, characterized in that: A sealing sleeve (612) is provided between the push-pull rod (61) and the main body (1).

10. The diaphragm valve device according to any one of claims 1 to 6, characterized in that: A mating surface (41) for convex-concave mating with the push-pull rod (61) is provided on the outer end surface of the valve port (4).

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