Rising stem gate valve with air pressure sealing structure

Abstract

The utility model relates to the technical field of rising stem gate valves, in particular to a rising stem gate valve with an air pressure sealing structure, which comprises a valve body and an air pressure component, the air pressure component is arranged on the valve body, an inner threaded rod is arranged in the middle of a valve cavity of the valve body, and valve plates are respectively arranged on two sides of the bottom of the inner threaded rod. The side, away from the inner threaded rod, of the valve plate is connected with a sealing ring used for blocking a circulation opening of the valve body. Through a mechanism composed of the valve body and the air pressure assembly, a rising stem gate valve with high use sealing performance is provided for a pipeline system, pressurization can be achieved through the air pressure assembly, the valve plate is pneumatically expanded and pushed to be sealed with the circulation opening in a covering mode, the sealing performance of closure after the valve plate descends is greatly improved, and the use stability of the whole gate valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rising stem gate valves, in particular to a rising stem gate valve with a pneumatic sealing structure. Background Art

[0002] Rising stem gate valves are widely used in many fields, including pipeline systems in chemical, petroleum, water supply and drainage, central air conditioning, fire protection and other fields, and are often used for pipeline cutting operations.

[0003] During the period when the valve plate of the existing rising stem gate valve cuts off the flow port of the valve body, the contact pressure between the two sides of the valve plate and the valve body is limited, resulting in low reliability of the overall gate valve in shutting off the medium between the pipelines. Therefore, a rising stem gate valve with a pneumatic sealing structure is proposed. Utility Model Content

[0004] In response to the problems in the prior art, the utility model provides a rising-stem gate valve with an air pressure sealing structure to provide a set of rising-stem gate valves with high sealing performance for the pipeline system. The air pressure component can achieve pressurization, so that the valve plate is pushed by the pneumatic expansion to seal with the flow port cover, so that the sealing performance of the valve plate in intercepting the flow after it is lowered is greatly improved, thereby improving the stability of the overall gate valve.

[0005] The technical solution adopted by the utility model to solve the technical problem is a rising stem gate valve with a pneumatic sealing structure, comprising a valve body and a pneumatic component, wherein the pneumatic component is arranged on the valve body;

[0006] An internal threaded rod is provided in the middle of the valve cavity of the valve body, and valve plates are provided on both sides of the bottom of the internal threaded rod respectively. A sealing ring for sealing the flow port of the valve body is connected to the side of the valve plate away from the internal threaded rod.

[0007] By adopting the above technical solution, a mechanism consisting of a valve body and a pneumatic component is used to provide a set of rising-stem gate valves with high sealing performance for the pipeline system. The pneumatic component can be used to increase pressure, so that the valve plate is pushed by the pneumatic expansion to seal with the flow port cover, so that the sealing performance of the valve plate in intercepting flow after it is lowered is greatly improved, thereby improving the stability of the overall gate valve.

[0008] Specifically, the top and bottom of the valve plate away from the sealing ring are connected to a tension spring, one end of the tension spring away from the valve plate is connected to the internal threaded rod, the bottom of the internal threaded rod is connected to a telescopic airbag, and the end of the telescopic airbag is connected to the valve plate.

[0009] By adopting the above technical solution and setting the tension spring, when the telescopic airbag does not expand and push the valve plates on both sides of the internal threaded rod, the tension spring can pull the valve plates back, thereby reducing the distance between the valve plates and reducing the resistance between the valve plates and the valve body during the process of the internal threaded rod rising.

[0010] Specifically, a screw is threadedly connected to the top of the internal threaded rod, the neck of the screw is rotatably connected to the valve body through a bearing, and the outer periphery of the screw is connected to a handwheel.

[0011] By adopting the above technical solution, the screw is rotated by the handwheel, so that the screw is connected with the thread inside the internal threaded rod, so that the internal threaded rod can be threaded and lifted in the valve body. The outside of the internal threaded rod is a rectangular structure, and the valve body is provided with an internal rectangular opening for the internal threaded rod with an external rectangular structure to be lifted and lowered.

[0012] Specifically, the pneumatic component includes a piston cavity, which is opened at the top of the screw, and the top of the piston cavity is connected to an internal threaded sleeve, and the internal thread of the internal threaded sleeve is inserted with a built-in screw, the bottom end of the built-in screw is connected to a piston located in the piston cavity, and the top of the built-in screw is connected to a knob.

[0013] By adopting the above technical solution and setting up the air pressure component, it is possible to increase the air pressure in the telescopic airbag, so that the telescopic airbag extends and expands, and the telescopic airbag pushes the valve plate, and the valve plate pushes the flow port, thereby further improving the sealing between the valve plate and the flow port.

[0014] Specifically, air flow channels are provided in the screw and the internal threaded rod. The top of the air flow channel of the screw is connected to the bottom of the piston cavity, and the bottom of the air flow channel of the internal threaded rod is connected to the telescopic airbag. The bottom of the air flow channel of the screw is fixedly connected to an air pipe, and the bottom of the air pipe is inserted in the air flow channel of the internal threaded rod. A sealing ring is provided on the outer periphery of the bottom of the air pipe.

[0015] By adopting the above technical solution, the air between the telescopic airbag and the piston cavity can circulate through the cooperation of the air flow channel and the air pipe.

[0016] The beneficial effects of the utility model are as follows: through the mechanism composed of the valve body and the pneumatic component, a set of rising-stem gate valves with high sealing performance is provided for the pipeline system, the pneumatic component can achieve pressurization, so that the valve plate is pushed and sealed with the flow port by the pneumatic expansion, so that the sealing performance of the valve plate after the valve plate is lowered is greatly improved, and the stability of the use of the entire gate valve is improved, and the problem of low sealing reliability of the overall gate valve for the medium between the pipelines due to the limited contact pressure between the two sides of the valve plate and the valve body during the period when the valve plate of the existing rising-stem gate valve cuts off the flow port of the valve body is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the valve body of the present utility model;

[0021] Figure 4 This is an exploded diagram of the internal threaded rod and valve plate of the utility model;

[0022] Figure 5 For the utility model Figure 2 A in the middle is an enlarged schematic diagram;

[0023] Figure 6 This is a schematic diagram of the trachea of the present utility model;

[0024] In the figure: valve body 1, flow port 101, internal threaded rod 11, screw 12, air pipe 121, handwheel 13, valve plate 14, sealing ring 141, telescopic airbag 15, tension spring 16, pneumatic assembly 2, piston chamber 21, internal threaded sleeve 22, built-in screw 23, piston 24, knob 25, air flow channel 26. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1-6 As shown, the rising stem gate valve with a pneumatic sealing structure described in the present invention comprises a valve body 1 and a pneumatic component 2, wherein the pneumatic component 2 is arranged on the valve body 1;

[0027] An internal threaded rod 11 is provided in the middle of the valve cavity of the valve body 1, and valve plates 14 are provided on both sides of the bottom of the internal threaded rod 11. The side of the valve plate 14 away from the internal threaded rod 11 is connected to a sealing ring 141 for sealing the flow port 101 of the valve body 1.

[0028] When in use, the valve body 1 and the pneumatic component 2 are used to provide a set of high-sealing rising-stem gate valves for the pipeline system. The pneumatic component 2 can be used to increase the pressure, so that the valve plate 14 is pushed by the pneumatic expansion to seal with the flow port 101, so that the sealing performance of the valve plate 14 in intercepting the flow after it is lowered is greatly improved, thereby improving the stability of the overall gate valve.

[0029] The utility model also includes that the top and bottom of the side of the valve plate 14 away from the sealing ring 141 are connected to a tension spring 16, and the end of the tension spring 16 away from the valve plate 14 is connected to the internal threaded rod 11, and the bottom of the internal threaded rod 11 is penetrated by a telescopic airbag 15, and the end of the telescopic airbag 15 is connected to the valve plate 14.

[0030] During use, by utilizing the setting of the tension spring 16, when the telescopic airbag 15 does not expand and push the valve plates 14 on both sides of the internal threaded rod 11, the tension spring 16 can pull the valve plates 14 back, thereby reducing the distance between the valve plates 14 and reducing the resistance between the valve plates 14 and the valve body during the process of the internal threaded rod 11 rising.

[0031] The utility model further comprises: a screw rod 12 is threadedly connected to the top of the internal threaded rod 11; the neck of the screw rod 12 is rotatably connected to the valve body 1 through a bearing; and a hand wheel 13 is connected to the outer periphery of the screw rod 12 .

[0032] During use, based on the rotation of the screw rod 12 by the handwheel 13, the screw rod 12 is connected with the thread inside the internal threaded rod 11, so that the internal threaded rod 11 is threadedly raised and lowered in the valve body 1. The external part of the internal threaded rod 11 is a rectangular structure, and the valve body 1 is provided with an internal rectangular opening for the lifting and lowering of the internal threaded rod 11 with a rectangular structure on the outside.

[0033] The present utility model also includes that the pneumatic component 2 includes a piston chamber 21, the piston chamber 21 is opened at the top of the screw 12, the top of the piston chamber 21 is connected to an internal threaded sleeve 22, the internal thread of the internal threaded sleeve 22 is inserted with a built-in screw 23, the bottom end of the built-in screw 23 is located in the piston chamber 21 and is connected to a piston 24, and the top of the built-in screw 23 is connected to a knob 25.

[0034] During use, based on the setting of the pneumatic component 2, the air pressure in the telescopic airbag 15 can be increased, so that the telescopic airbag 15 extends and expands, and the telescopic airbag 15 pushes the valve plate 14, and the valve plate 14 pushes the flow port 101, further improving the sealing between the valve plate 14 and the flow port 101.

[0035] The present utility model also includes that an air flow channel 26 is opened in both the screw 12 and the internal threaded rod 11, the top of the air flow channel 26 of the screw 12 is connected to the bottom of the piston chamber 21, and the bottom of the air flow channel 26 of the internal threaded rod 11 is connected to the telescopic airbag 15, and the bottom of the air flow channel 26 of the screw 12 is fixedly connected to the air pipe 121, the bottom of the air pipe 121 is inserted into the air flow channel 26 of the internal threaded rod 11, and a sealing ring is provided on the outer periphery of the bottom of the air pipe 121.

[0036] When in use, the air flow channel 26 and the air tube 121 cooperate to allow air to circulate between the telescopic airbag 15 and the piston chamber 21 .

[0037] The cam 12 is then rotated to allow the inner threaded rod 11 to be threadedly lifted and lowered in the valve body 1, so that the inner threaded rod 11 drives the valve plates 14 on both sides of its bottom to descend, thereby cutting off the flow ports 101 at both ends of the valve body 1. Subsequently, the knob 25 is rotated to allow the built-in screw 23 to descend in the inner threaded sleeve 22, so that the piston 24 discharges the air in the piston chamber 21 to the air flow channel 26 and the air pipe 121 in turn, until the air enters the telescopic airbag 15, so that the telescopic airbag 15 is expanded and pushes the valve plate 14 to push the valve plate 14 against the flow port 101, thereby further improving the sealing between the valve plate 14 and the flow port 101.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rising stem gate valve with a pneumatic sealing structure, characterized in that: It comprises a valve body (1) and a pneumatic assembly (2), wherein the pneumatic assembly (2) is arranged on the valve body (1); An internally threaded rod (11) is provided in the middle of the valve cavity of the valve body (1), and valve plates (14) are provided on both sides of the bottom of the internally threaded rod (11), and a sealing ring (141) for sealing the flow port (101) of the valve body (1) is connected to the side of the valve plate (14) away from the internally threaded rod (11).

2. A rising stem gate valve with a pneumatic sealing structure according to claim 1, characterized in that: The top and bottom of the side of the valve plate (14) away from the sealing ring (141) are both connected to a tension spring (16), one end of the tension spring (16) away from the valve plate (14) is connected to the internal threaded rod (11), and the bottom of the internal threaded rod (11) is connected to a telescopic airbag (15), and the end of the telescopic airbag (15) is connected to the valve plate (14).

3. A rising stem gate valve with a pneumatic sealing structure according to claim 2, characterized in that: The top of the internal threaded rod (11) is threadedly connected to a screw rod (12), the neck of the screw rod (12) is rotatably connected to the valve body (1) via a bearing, and the outer periphery of the screw rod (12) is connected to a hand wheel (13).

4. A rising stem gate valve with a pneumatic sealing structure according to claim 3, characterized in that: The pneumatic assembly (2) includes a piston chamber (21), the piston chamber (21) is opened at the top of the screw (12), the top of the piston chamber (21) is connected to an internal threaded sleeve (22), the internal thread of the internal threaded sleeve (22) is provided with an internal screw (23), the bottom end of the internal screw (23) is located in the piston chamber (21) and is connected to a piston (24), and the top end of the internal screw (23) is connected to a knob (25).

5. The rising stem gate valve with a pneumatic sealing structure according to claim 4, characterized in that: An air flow channel (26) is provided in both the screw rod (12) and the internally threaded rod (11). The top of the air flow channel (26) of the screw rod (12) is connected to the bottom of the piston chamber (21). The bottom of the air flow channel (26) of the internally threaded rod (11) is connected to the telescopic airbag (15). The bottom of the air flow channel (26) of the screw rod (12) is fixedly connected to an air pipe (121). The bottom of the air pipe (121) is inserted into the air flow channel (26) of the internally threaded rod (11). A sealing ring is provided on the outer periphery of the bottom of the air pipe (121).

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