Pneumatic and manual wedge gate valve

Abstract

The utility model provides a pneumatic and manual wedge gate valve, which belongs to the field of gate valves and comprises a valve body, connecting pipes are arranged on two sides of the valve body in a penetrating manner, a valve cover is arranged above the valve body, and a pneumatic piston device is fixedly mounted at the top of the valve cover; the valve assembly comprises a valve rod, two gate plates, two connecting rods and two rubber plugs, the valve rod is arranged in the valve body, the two gate plates are hinged to the two sides of the inner wall of the valve body respectively, the two rubber plugs are fixedly arranged on the outer sides of the two gate plates respectively, and the two rubber plugs are matched with the connecting pipes on the same side respectively. According to the gate valve, the valve assembly is arranged, friction between the two gate plates and the valve body can be avoided, abrasion is avoided, the service life is prolonged, the overhauling assembly is further arranged, the interior of the valve body can be overhauled, the two rubber plugs can be replaced, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a pneumatic manual wedge-type gate valve. Background Art

[0002] The gate valve is one of many pipeline valves, which is mainly used to control the interception of liquid media in pipelines and is widely used; existing gate valves usually adopt handwheel transmission or pneumatic transmission device to realize the opening and closing function of the valve.

[0003] Most of the pneumatic manual wedge gate valves in the prior art use a gate plate to close and open. This method will cause relative friction between the contact surface between the gate plate and the valve body. Long-term use will cause wear of the gate plate and the valve body, reduce the sealing performance of the wedge gate valve, and affect the service life of the wedge gate valve. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pneumatic wedge-type gate valve with manual operation.

[0005] The embodiment of the utility model provides a pneumatic manual wedge gate valve, comprising:

[0006] A valve body, connecting pipes are provided on both sides of the valve body, a valve cover is provided above the valve body, and a pneumatic piston device is fixedly installed on the top of the valve cover;

[0007] A valve assembly, the valve assembly comprising a valve stem, two gate plates, two connecting rods and two rubber plugs, the valve stem being arranged in the valve body, the two gate plates being respectively hinged on both sides of the inner wall of the valve body, the two rubber plugs being respectively fixedly arranged on the outer sides of the two gate plates, the two rubber plugs being respectively arranged in cooperation with the connecting pipes on the same side, the bottom ends of the two connecting rods being respectively hingedly connected to the inner sides of the two gate plates, and the top ends of the two connecting rods being both hingedly connected to the bottom of the valve stem.

[0008] Furthermore, it also includes an inspection component, which includes an inspection cover and two bolts. An inspection port is provided through the bottom of the valve body, and the inspection cover is threadedly connected to the outside of the inspection port. Threaded holes are provided on the outsides of the two gate plates, and the two bolts are respectively inserted into the two threaded holes for threaded connection. The two bolts are respectively inserted through the rubber plug on the through side and are movably arranged.

[0009] Furthermore, flanges are fixedly provided on the contact surfaces of the valve cover and the valve body, the valve cover and the valve body are sealed and connected via two flanges, and the valve stem is movably provided to penetrate the two flanges.

[0010] Furthermore, a hand wheel is mounted on the top of the pneumatic piston device, a bracket is fixedly arranged on the bottom of the pneumatic piston device, and the bottom of the bracket is fixedly arranged on the valve cover.

[0011] Furthermore, the valve stem passes through the valve cover sliding seal arrangement, and the valve stem is fixedly connected to the output end of the pneumatic piston device.

[0012] Furthermore, gaskets are sleeved on the two bolts, and the two gaskets are respectively arranged to abut against the rubber plugs on the same side.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Two gates and two rubber plugs are set. The valve stem is driven upward by a pneumatic piston device or a handwheel, driving the two connecting rods to move upward. The two connecting rods drive the corresponding gates to rotate upward. The two gates drive the two rubber plugs to separate from the corresponding connecting pipes. At this time, it is in an open state. The valve stem is driven downward by a pneumatic piston device or a handwheel, and the corresponding gate is pushed to rotate downward by the two connecting rods, driving the two rubber plugs to rotate downward and insert them into the corresponding connecting pipes. At this time, it is in a closed state. The operation is simple, avoiding friction between the gate and the valve body, and extending the service life.

[0015] 2. Set up an inspection cover and two bolts. First unscrew the inspection cover, then open the two gates, and then unscrew the two bolts in sequence to replace the two rubber plugs. At the same time, you can also inspect the inside of the valve body. The operation is simple, easy to use, and increases practicality.

[0016] In summary, the utility model is provided with a valve assembly, which can avoid friction between the two gate plates and the valve body, avoid wear and tear, and extend the service life. A maintenance assembly is also provided, which can inspect the interior of the valve body and replace the two rubber plugs, thereby increasing practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the pneumatic manual wedge gate valve described in the embodiment of the utility model.

[0018] Figure 2 It is a cross-sectional view of the valve assembly in the pneumatic manual wedge gate valve described in the embodiment of the utility model.

[0019] Figure 3 It is an enlarged view of point A in the pneumatic manual wedge gate valve described in the embodiment of the utility model.

[0020] In the above drawings: 1 valve body, 2 connecting pipe, 3 valve cover, 4 flange, 5 bracket, 6 pneumatic piston device, 7 valve stem, 8 gate plate, 9 connecting rod, 10 rubber plug, 11 inspection cover, 12 bolts, 13 gasket. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-Figure 3 As shown, the embodiment of the utility model provides a pneumatic manual wedge gate valve, comprising:

[0023] A valve body 1, connecting pipes 2 are provided on both sides of the valve body 1, a valve cover 3 is provided above the valve body 1, flanges 4 are fixedly provided on the contact surfaces of the valve cover 3 and the valve body 1, the valve cover 3 and the valve body 1 are sealed and connected via two flanges 4, a pneumatic piston device 6 is fixedly installed on the top of the valve cover 3, a hand wheel is installed on the top of the pneumatic piston device 6, a bracket 5 is fixedly provided on the bottom of the pneumatic piston device 6, and the bottom of the bracket 5 is fixedly provided on the valve cover 3;

[0024] The pneumatic piston device 6 can drive its output end to extend and retract up and down. By turning the hand wheel, the valve stem 7 can be driven to move up and down by the pneumatic piston device 6. This technology is prior art and will not be described in detail here.

[0025] The valve assembly includes a valve stem 7, two gate plates 8, two connecting rods 9 and two rubber plugs 10. The valve stem 7 is arranged in the valve body 1, and the valve stem 7 penetrates two flanges 4 for movable arrangement. The valve stem 7 penetrates the valve cover 3 for sliding sealing arrangement. The valve stem 7 is fixedly connected to the output end of the pneumatic piston device 6, so that the pneumatic piston device 6 can drive the valve stem 7 to move up and down;

[0026] The two gate plates 8 are hinged on both sides of the inner wall of the valve body 1, and the two rubber plugs 10 are fixedly arranged on the outer sides of the two gate plates 8. The two rubber plugs 10 are respectively arranged in cooperation with the connecting pipes 2 on the same side, so that the two rubber plugs 10 can be inserted into the connecting pipes 2 on the same side and seal the two connecting pipes 2. The bottom ends of the two connecting rods 9 are respectively hingedly connected to the inner sides of the two gate plates 8, and the top ends of the two connecting rods 9 are hingedly connected to the bottom of the valve stem 7, so that the valve stem 7 moves and the corresponding gate plates 8 can be driven to rotate through the two connecting rods 9;

[0027] It also includes an inspection component, which includes an inspection cover 11 and two bolts 12. An inspection port is provided at the bottom of the valve body 1, and the inspection cover 11 is threadedly connected to the outside of the inspection port. Threaded holes are provided on the outsides of the two gate plates 8, and the two bolts 12 are respectively inserted into the two threaded holes for threaded connection. The two bolts 12 are respectively penetrated through the rubber plugs 10 on the through side and are movably arranged. The two bolts 12 fix the two rubber plugs 10. Gaskets 13 are sleeved on the two bolts 12, and the two gaskets 13 are respectively set against the rubber plugs 10 on the same side. The two gaskets 13 can make the fixation of the two rubber plugs 10 more uniform and more stable.

[0028] The detailed working process of the utility model is as follows:

[0029] 1. When in use, the staff drives the valve stem 7 upward through the pneumatic piston device 6 or the hand wheel, and the valve stem 7 drives the corresponding gate plate 8 to rotate upward through the two connecting rods 9, and the two gate plates 8 drive the two rubber plugs 10 to rotate upward and separate from the corresponding connecting pipes 2. At this time, it is in the open state. The valve stem 7 is driven downward by the pneumatic piston device 6 or the hand wheel, and the valve stem 7 pushes the corresponding gate plate 8 to rotate downward through the two connecting rods 9. The two gate plates 8 drive the two rubber plugs 10 to rotate downward and insert into the corresponding connecting pipes 2 to seal the two connecting pipes 2. At this time, it is in the closed state;

[0030] 2. The staff can inspect the inside of the valve body 1 by unscrewing the inspection cover 11. When replacing the rubber plug 10, first open the two gate plates 8, then unscrew the two bolts 12, and then remove the two rubber plugs 10 for replacement, and then use the two bolts 12 and two gaskets 13 to install and fix the two rubber plugs 10, and finally cover the inspection cover 11.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Pneumatic manual wedge gate valve, characterized by: include: A valve body (1), connecting pipes (2) are provided on both sides of the valve body (1), a valve cover (3) is provided above the valve body (1), and a pneumatic piston device (6) is fixedly installed on the top of the valve cover (3); A valve assembly, the valve assembly comprising a valve stem (7), two gate plates (8), two connecting rods (9) and two rubber plugs (10), the valve stem (7) being arranged in a valve body (1), the two gate plates (8) being respectively hinged on both sides of the inner wall of the valve body (1), the two rubber plugs (10) being respectively fixedly arranged on the outer sides of the two gate plates (8), the two rubber plugs (10) being respectively arranged in cooperation with the connecting pipes (2) on the same side, the bottom ends of the two connecting rods (9) being respectively hingedly connected to the inner sides of the two gate plates (8), and the top ends of the two connecting rods (9) being both hingedly connected to the bottom of the valve stem (7).

2. The pneumatic manual wedge gate valve according to claim 1 is characterized in that: in: It also includes an inspection component, which includes an inspection cover (11) and two bolts (12). The bottom of the valve body (1) is provided with an inspection port, and the inspection cover (11) is threadedly connected to the outside of the inspection port. The outsides of the two gate plates (8) are provided with threaded holes, and the two bolts (12) are respectively inserted into the two threaded holes for threaded connection. The two bolts (12) are respectively inserted through the rubber plug (10) on the through side and are movably arranged.

3. The pneumatic manual wedge gate valve according to claim 1 is characterized in that: in: The contact surfaces of the valve cover (3) and the valve body (1) are fixedly provided with flanges (4); the valve cover (3) and the valve body (1) are sealedly connected via two flanges (4); and the valve stem (7) is movably provided passing through the two flanges (4).

4. The pneumatic manual wedge gate valve according to claim 1 is characterized in that: in: A hand wheel is mounted on the top of the pneumatic piston device (6), a bracket (5) is fixedly arranged on the bottom of the pneumatic piston device (6), and the bottom of the bracket (5) is fixedly arranged on the valve cover (3).

5. The pneumatic manual wedge gate valve according to claim 1 is characterized in that: in: The valve stem (7) penetrates the valve cover (3) in a sliding seal arrangement, and the valve stem (7) is fixedly connected to the output end of the pneumatic piston device (6).

6. The pneumatic manual wedge gate valve according to claim 2 is characterized in that: in: A gasket (13) is sleeved on each of the two bolts (12), and the two gaskets (13) are respectively disposed against the rubber plugs (10) on the same side.

Images