High-flow diaphragm valve

Abstract

The utility model relates to the technical field of diaphragm valves, in particular to a high-flow diaphragm valve, which is characterized in that a top block and a valve cover are connected through a top pin, so that the flow capacity of a diaphragm is increased on the premise that the diameter of the diaphragm is not increased; comprising a valve body, a valve rod, a valve cover, a valve clack, a diaphragm, an operating rod, a middle flange bolt, an operating arm, a top bolt, a top block and a top pin, sealing weirs are arranged on the two side faces of the valve body respectively, the diaphragm is arranged on the sealing weirs, the diaphragm is pressed by the valve cover and supported through the valve clack, the valve clack is driven by the valve rod, and the operating rod penetrates through a center opening in the valve body. The valve cover and the valve body are fastened through a middle flange bolt, the operating arm and the ejector block are connected through a top bolt and can rotate freely, and the ejector block and the valve cover are connected through a top pin.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm valves, and in particular to high-flow-rate diaphragm valves. Background Technology

[0002] A diaphragm valve is a type of valve in which a flexible diaphragm or a combination of diaphragms is installed inside the valve body and valve cover. The advantage of a diaphragm valve is that its operating mechanism is isolated from the medium circuit, which not only ensures the purity of the working medium, but also prevents the possibility of the medium in the pipeline impacting the working parts of the operating mechanism. The flow channel of a diaphragm valve body is generally weir-type or straight-through type. The opening and closing of a diaphragm valve is achieved by rotating a handwheel, which moves the valve stem up and down, thereby driving the valve disc and diaphragm to rise and fall. When the handwheel is rotated clockwise, the valve disc and diaphragm descend, cutting off the passage and closing the valve; conversely, the valve opens. The main advantages of this type of valve are: low torque, the ability to select diaphragm material according to different working conditions, convenient disassembly and maintenance, reliable sealing, and long service life.

[0003] However, as the size of the diaphragm valve increases, the pressure it can withstand decreases. Therefore, to further increase its flow capacity, structural optimization is needed without increasing the diaphragm diameter. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a high-flow-rate diaphragm valve.

[0005] This utility model relates to a high-flow-rate diaphragm valve, comprising a valve body, valve stem, valve cover, valve disc, diaphragm, operating rod, middle flange bolts, operating arm, top bolts, top block, and top pin. Sealing weir surfaces are provided on both sides of the valve body, and a diaphragm is placed on these weir surfaces. The diaphragm is pressed together by the valve cover and supported by the valve disc, which is driven by the valve stem. The operating rod passes through a central opening on the valve body. The valve cover and valve body are fastened by the middle flange bolts. The operating arm and top block are connected by top bolts and are self-adjustable. The top block and valve cover are connected by a top pin through rotation; the diaphragm improves sealing performance with the cooperation of two sets of sealing weir surfaces. The diaphragm is pressed by the valve cover and supported by the valve disc, which is driven by the valve stem. The operating rod passes through the central opening on the valve body. The valve cover and valve body are fastened by the middle flange bolts. The operating arm and top block are connected by top bolts and can rotate freely. The top block and valve cover are connected by a top pin, thereby increasing the flow capacity of the diaphragm without increasing the diaphragm diameter.

[0006] Preferably, it also includes a slider, a top nut, a tapered pin, and a handwheel. The two operating arms are connected by the slider. The slider has a trapezoidal thread inside and mates with the external thread on the operating rod. The top nut is threaded to the operating rod. The handwheel is installed at one end of the operating rod and fixed by the tapered pin. When the operating rod is rotated, the slider can move up and down, and the operating rod drives the top block to realize the valve opening and closing function.

[0007] Preferably, it also includes a slider bolt, which is threadedly connected to the slider, and the tightness of the slider bolt should be moderate; the tightness of the slider bolt should be moderate so as not to affect the rotation of 6; the operating handwheel can operate the upper and lower parts of the valve group simultaneously through the linkage mechanism.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: the diaphragm improves the sealing performance with the cooperation of two sets of sealing weir surfaces, the diaphragm is pressed by the valve cover, the diaphragm is supported by the valve disc, the valve disc is driven by the valve stem, the operating rod passes through the central opening on the valve body, the valve cover and the valve body are fastened by the middle flange bolts, the operating arm and the top block are connected by the top bolts and the operating arm and the top block can rotate freely, and the top block and the valve cover are connected by the top pin, thereby increasing the flow capacity of the diaphragm without increasing the diameter of the diaphragm. Attached Figure Description

[0009] Figure 1 This is a first cross-sectional view of the present invention;

[0010] Figure 2 This is a second cross-sectional view of the present invention;

[0011] Figure 3 This is an isometric drawing of this utility model.

[0012] The following are labels in the attached diagram: 1. Valve body; 2. Valve stem; 3. Valve cover; 4. Valve disc; 5. Diaphragm; 6. Operating lever; 7. Middle flange bolt; 8. Operating arm; 9. Top bolt; 10. Top block; 11. Top pin; 12. Slider; 13. Top nut; 14. Tapered pin; 15. Handwheel; 16. Slider bolt. Detailed Implementation

[0013] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0014] like Figures 1 to 3As shown, the large-flow diaphragm valve of this utility model includes a valve body 1, a valve stem 2, a valve cover 3, a valve disc 4, a diaphragm 5, an operating rod 6, a middle flange bolt 7, an operating arm 8, a top bolt 9, a top block 10, and a top pin 11. Sealing weir surfaces are provided on both sides of the valve body 1, and a diaphragm 5 is provided on the sealing weir surfaces. The diaphragm 5 is pressed by the valve cover 3 and supported by the valve disc 4. The valve disc 4 is driven by the valve stem 2. The operating rod 6 passes through the central opening on the valve body 1. The valve cover 3 and the valve body 1 are fastened by the middle flange bolt 7. The operating arm 8 and the top block 10 are connected by the top bolt 9 and can rotate freely. The top block 10 and the valve cover 3 are connected by the top pin 11.

[0015] It also includes a slider 12, a top nut 13, a tapered pin 14 and a handwheel 15. The two operating arms 8 are connected by the slider 12. The slider 12 has a trapezoidal thread inside and mates with the external thread on the operating rod 6. The top nut 13 is threaded to the operating rod 6. The handwheel 15 is installed at one end of the operating rod 6 and is fixed by the tapered pin 14.

[0016] It also includes a slider bolt 16, which is threadedly connected to the slider 12, and the tightness of the slider bolt 16 should be moderate.

[0017] In this embodiment, the tightness of the slider bolt 16 should be moderate so as not to affect the rotation of 6; the operating handwheel 15 can operate the upper and lower parts of the valve group simultaneously through the linkage mechanism; the diaphragm 5 achieves improved sealing performance with the cooperation of the two sets of sealing weir surfaces; the diaphragm 5 is pressed by the valve cover 3 and supported by the valve disc 4; the valve disc 4 is driven by the valve stem 2; the operating rod 6 passes through the central opening on the valve body 1; the valve cover 3 and the valve body 1 are fastened by the middle flange bolt 7; the operating arm 8 and the top block 10 are connected by the top bolt 9 and the operating arm 8 and the top block 10 can rotate freely; the top block 10 and the valve cover 3 are connected by the top pin 11; when the operating rod 6 rotates, the slider 12 can move up and down; the operating rod 6 drives the top block 10 to realize the valve opening and closing function, thereby increasing the flow capacity of the diaphragm 5 without increasing the diameter of the diaphragm 5.

[0018] The large-flow diaphragm valve of this utility model has all parts symmetrically arranged on the upper and lower sides of the valve body 1. Sealing weir surfaces are provided on both sides of the valve body, and diaphragms are installed on the upper and lower sides. It is also equipped with functional components such as valve cover and valve stem. Four pull rods are used in conjunction with top block and slider to form two sets of linkage mechanisms. The operating rod passes through the central opening of the valve body. When the handwheel drives the operating rod, the upper and lower diaphragms can be opened or closed simultaneously. The diaphragm 5 of the large-flow diaphragm valve of this utility model is purchased from the market. Those skilled in the industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0019] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A large flow diaphragm valve comprising a valve body (1), a valve stem (2), a valve cover (3), a valve disc (4), a diaphragm (5), an operating lever (6), a middle flange bolt (7), an operating arm (8), a top bolt (9), a top block (10) and a top pin (11), characterized in that, The valve body (1) is provided with sealing weir surface on both sides, the sealing weir surface is provided with diaphragm (5), the diaphragm (5) is pressed by valve cover (3), the diaphragm (5) is supported by valve clapper (4), the valve clapper (4) is driven by valve stem (2), operating rod (6) passes through the center opening of valve body (1), valve cover (3) and valve body (1) are fastened by middle flange bolt (7), operating arm (8) and top block (10) are connected by top bolt (9) and operating arm (8) and top block (10) can rotate freely, top block (10) and valve cover (3) are connected by top pin (11).

2. The high flow diaphragm valve as described in claim 1, wherein, It also includes slider (12), top nut (13), taper pin (14) and hand wheel (15), two operating arms (8) are connected by slider (12), the inside of slider (12) has trapezoidal thread and cooperates with the outer thread on operating rod (6), top nut (13) is threadedly connected with operating rod (6), hand wheel (15) is installed on one end of operating rod (6) and is fixed by taper pin (14).

3. The high flow diaphragm valve as defined in claim 2 wherein, It also includes slider bolt (16), the slider bolt (16) is threadedly connected with slider (12), and the tightness of the slider bolt (16) is moderate.

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