Double-sealing dome valve

Abstract

The utility model relates to the field of valves, and discloses a double-seal dome valve which comprises a valve body, a top plate, a valve core and an air bag, the top plate is movably arranged in the valve body, and the double-seal dome valve is characterized in that a threaded groove is formed in the inner wall surface of a middle channel of the top plate, the top plate is in threaded connection with a sealing seat, and a sealing ring is arranged at the bottom end of the sealing seat; the sealing ring is tightly attached to the valve element. The threaded groove is formed in the inner wall face of the middle channel of the top plate, the top plate is in threaded connection with the sealing seat, the sealing ring is arranged at the bottom end of the sealing seat and tightly attached to the valve element, and the sealing ring and the valve element form second sealing, so that on one hand, materials can be prevented from passing through, and on the other hand, the materials can be prevented from making contact with the air bag; when the sealing ring is abraded, the sealing performance is reduced, the gap between the sealing ring and the valve element is reduced by rotating the sealing seat, the sealing performance is further improved, and the practicability of the device is improved through the reasonable structural design.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a double-sealed dome valve. Background Art

[0002] As a new type of special valve for bulk materials, the dome valve can effectively open and close quickly for bulk materials and interception, and is currently widely used in industries such as metallurgy, cement, electric power, chemical industry, building materials, and food. The dome valve generally includes a valve body, a hemispherical body arranged in the valve body. The hemispherical body is generally rotatably arranged on the valve body through a rotating shaft, and the hemispherical body is driven to rotate in the valve body by driving the rotating shaft to rotate, so as to adjust its position in the valve body and adjust the opening and closing state of the valve port.

[0003] The prior art discloses a dome valve (publication number: CN106224587A), which includes a valve body, a top cover, a rotating shaft, a pneumatic actuator and a positioning swing arm, and also includes a support seat, an inner ring, an elastic sealing ring, a hemispherical support and a hemispherical body. After being inflated, the elastic sealing ring is in close contact with the hemispherical body. A first scraping device facing the hemispherical body is arranged at the lower end of the support seat; a circular hole is arranged in the middle of the top cover, and a second scraping device facing the hemispherical body is arranged on the circular hole.

[0004] The prior art can effectively prevent the scaling and accumulation of materials on the hemispherical body. However, the materials are in direct contact with the elastic sealing ring (airbag). When the valve core of the dome valve in the prior art opens and closes, the materials directly generate friction on the airbag, resulting in increased wear of the airbag, decreased sealing performance and shortened service life.

[0005] Therefore, those skilled in the art provide a double-sealed dome valve to solve the problems raised in the above background art. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a double-sealed dome valve, which solves the problems raised in the above background art.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A double-sealed dome valve includes a valve body, a top plate, a valve core and an airbag. The top plate is movably arranged in the valve body. It is characterized in that: a threaded groove is opened on the inner wall surface of the middle channel of the top plate, and a sealing seat is threadedly connected to the top plate. A sealing ring is arranged at the bottom end of the sealing seat, and the sealing ring is in close fit with the valve core.

[0009] According to the double-sealed dome valve described above, left and right shaft seats are respectively fixedly connected to both sides of the valve body. A left rotating shaft and a right rotating shaft are respectively arranged in the left and right shaft seats. The left rotating shaft and the right rotating shaft are respectively matched with the left and right shaft seats through wear-resistant sliding bearings.

[0010] According to the double-sealed dome valve described above, the bottom ends on both sides of the valve core are respectively matched with the left rotating shaft and the right rotating shaft through elastic dowel pins.

[0011] According to the double-sealed dome valve described above, the top plate is fixedly installed at the top of the valve body. External thread teeth are provided on the outer wall surface of the sealing seat. The sealing seat is threadedly connected to the top plate through the external thread teeth. A fastening bolt is also provided between the sealing seat and the top plate to fasten the sealing seat through the fastening bolt.

[0012] According to the double-sealed dome valve described above, an installation groove is provided on the bottom wall surface of the sealing seat, and the sealing ring is fixedly installed in the installation groove.

[0013] According to the double-sealed dome valve described above, a support ring is provided inside the airbag. Ventilation grooves are provided on the support ring. An air inlet hole is provided on one side of the top plate. The ventilation grooves on the support ring communicate with the air inlet hole on the top plate. The airbag is fixed between the top plate and the valve body. When the valve core is closed in place, the airbag is inflated and fits with the valve core.

[0014] The present utility model provides a double-sealed dome valve, which has the following beneficial effects:

[0015] (1) In this application, thread grooves are provided on the inner wall surface of the middle channel of the top plate. The top plate is threadedly connected with a sealing seat. A sealing ring is provided at the bottom end of the sealing seat. The sealing ring is in close fit with the valve core. The sealing ring and the valve core form a second seal. On the one hand, it can prevent materials from passing through, and on the other hand, it can also prevent materials from contacting the airbag. When the sealing ring is worn and the sealing performance is reduced, the gap between the sealing ring and the valve core is reduced by rotating the sealing seat to further improve the sealing performance. After adjustment, the fastening bolt is tightened to fix the sealing seat and prevent the sealing seat from loosening. The practicability of this device is improved through a reasonable structural design.

[0016] (2) The top plate is fixedly installed at the top of the valve body. External thread teeth are provided on the outer wall surface of the sealing seat. The sealing seat is threadedly connected to the top plate through the external thread teeth, which is convenient for adjusting the gap between the sealing ring and the valve core. After adjustment, the fastening bolt is tightened to fix the sealing seat and prevent the sealing seat from loosening. When the sealing ring is worn and the sealing performance is reduced, the gap between the sealing ring and the valve core is reduced by rotating the sealing seat to further improve the sealing performance, avoiding frequent replacement of the sealing seat and the sealing ring and saving costs.

[0017] (3) By providing a support ring inside the airbag, ventilation grooves are provided on the support ring, an air inlet hole is provided on one side of the top plate, the ventilation grooves on the support ring communicate with the air inlet hole on the top plate, and the airbag is fixed between the top plate and the valve body. When the valve core is closed in place, the airbag is inflated and fits with the valve core. After the airbag is inflated, it forms a seal with the valve core, cooperating with the sealing ring and the valve core to form a double seal, which improves the sealing effect of the device while protecting the airbag. Description of the Drawings

[0018] Figure 1 is a sectional view of an existing technology dome valve;

[0019] Figure 2 is a sectional view of a double-sealed dome valve of the present utility model;

[0020] Figure 3 is a schematic perspective view of a double-sealed dome valve of the present utility model;

[0021] Figure 4 is a schematic perspective view of a seal seat of a double-sealed dome valve of the present utility model;

[0022] Figure 5 is a sectional view of a seal seat of a double-sealed dome valve of the present utility model.

[0023] Legend:

[0024] 101, seal seat; 102, seal ring; 103, top plate; 104, valve core; 105, airbag; 106, external thread teeth; 107, fastening bolt; 11, valve body. Detailed implementation manners

[0025] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "inner", "outer", "side", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model 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 to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0028] Such asFigures 1-5 As shown in the figure: A double-sealed dome valve, including a valve body 11, a top plate 103, a valve core 104 and an airbag 105. The top plate 103 is movably arranged in the valve body 11. Threaded grooves are provided on the inner wall surface of the middle channel of the top plate 103. The top plate 103 is threadedly connected with a sealing seat 101. A sealing ring 102 is arranged at the bottom end of the sealing seat 101. The sealing ring 102 is in close fit with the valve core 104. The sealing seat 101 is fastened by a fastening bolt 107.

[0029] Specifically, the valve body 11, the top plate 103, the valve core 104 and the airbag 105 are provided to form a dome valve. The airbag 105 and the valve core 104 cooperate to form a seal during operation, which can prevent materials from passing through. However, when the valve core 104 moves to open or close, the materials directly rub against the airbag 105, causing increased wear of the airbag 105, decreased sealing performance and shortened service life. In this application, threaded grooves are provided on the inner wall surface of the middle channel of the top plate 103. The top plate 103 is threadedly connected with a sealing seat 101. A sealing ring 102 is arranged at the bottom end of the sealing seat 101. The sealing ring 102 is in close fit with the valve core 104. The sealing ring 102 and the valve core 104 form a second seal. On the one hand, it can prevent materials from passing through. On the other hand, it can also prevent materials from contacting the airbag. When the sealing ring 102 is worn, the sealing performance decreases. By rotating the sealing seat 101, the gap between the sealing ring 102 and the valve core 104 is reduced, further improving the sealing performance. After adjustment, the fastening bolt 107 is tightened to fix the sealing seat 101 and prevent the sealing seat 101 from loosening. The practicability of this device is improved through a reasonable structural design.

[0030] On both sides of the valve body 11, a left shaft seat and a right shaft seat are respectively fixedly connected. A left rotating shaft and a right rotating shaft are respectively arranged in the left shaft seat and the right shaft seat. The left rotating shaft and the right rotating shaft are respectively matched with the left shaft seat and the right shaft seat through wear-resistant sliding bearings. The bottom ends on both sides of the valve core 104 are respectively matched with the left rotating shaft and the right rotating shaft through elastic dowel pins.

[0031] Specifically, by arranging that a left shaft seat and a right shaft seat are respectively fixedly connected to both sides of the valve body 11, a left rotating shaft and a right rotating shaft are respectively arranged in the left shaft seat and the right shaft seat. The left rotating shaft and the right rotating shaft are respectively matched with the left shaft seat and the right shaft seat through wear-resistant sliding bearings. The bottom ends on both sides of the valve core 104 are respectively matched with the left rotating shaft and the right rotating shaft through elastic dowel pins, the valve core 104 is movably installed in the valve body 11.

[0032] The top plate 103 is fixedly installed at the top end of the valve body 11. External thread teeth 106 are provided on the outer wall surface of the sealing seat 101. The sealing seat 101 is threadedly connected with the top plate 103 through the external thread teeth 106. A fastening bolt 107 is also arranged between the sealing seat 101 and the top plate 103. The sealing seat 101 is fastened by the fastening bolt 107.

[0033] Specifically, the top plate 103 is fixedly installed at the top end of the valve body 11. By providing external thread teeth 106 on the outer wall surface of the sealing seat 101, the sealing seat 101 is threadedly connected to the top plate 103 through the external thread teeth 106, which facilitates adjusting the gap between the sealing ring 102 and the valve core 104. After adjustment, the fastening bolt 107 is tightened to fix the sealing seat 101 and prevent the sealing seat 101 from loosening. When the sealing ring 102 is worn and the sealing performance decreases, the gap between the sealing ring 102 and the valve core 104 is reduced by rotating the sealing seat 101, further improving the sealing performance and avoiding frequent replacement of the sealing seat 101 and the sealing ring 102, thus saving costs.

[0034] An installation groove is provided on the bottom end wall surface of the sealing seat 101, and the sealing ring 102 is fixedly installed in the installation groove.

[0035] Specifically, by providing an installation groove on the bottom end wall surface of the sealing seat 101, the sealing ring 102 is fixedly installed in the installation groove.

[0036] A support ring is provided inside the airbag 105, and ventilation grooves are provided on the support ring. An air inlet hole is provided on one side of the top plate 103, and the ventilation grooves on the support ring communicate with the air inlet hole on the top plate 103. The airbag 105 is fixed between the top plate 103 and the valve body 11. When the valve core 104 is closed in place, the airbag 105 is inflated and fits with the valve core 104.

[0037] Specifically, by providing a support ring inside the airbag 105, ventilation grooves are provided on the support ring, an air inlet hole is provided on one side of the top plate 103, the ventilation grooves on the support ring communicate with the air inlet hole on the top plate 103, the airbag 105 is fixed between the top plate 103 and the valve body 11. When the valve core 104 is closed in place, the airbag 105 is inflated and fits with the valve core 104. After the airbag 105 is inflated, a seal is formed with the valve core 104, cooperating with the sealing ring 102 and the valve core 104 to form a double seal, which improves the sealing effect of the device while protecting the airbag 105.

[0038] The working principle of a double-seal dome valve in this application is as follows: The valve body 11, the top plate 103, the valve core 104, and the airbag 105 are provided to form a dome valve. When the valve core 104 is closed in place, the airbag 105 is inflated and fits with the valve core 104. After the airbag 105 is inflated, a seal is formed with the valve core 104. By providing threaded grooves on the inner wall surface of the middle channel of the top plate 103, the top plate 103 is threadedly connected to the sealing seat 101. A sealing ring 102 is provided at the bottom end of the sealing seat 101, and the sealing ring 102 is in close contact with the valve core 104. The sealing ring 102 and the valve core 104 form a second seal. The double seal further improves the sealing effect of the device. The sealing ring 102 isolates the material outside the gap between the valve core 104 and the airbag 105, avoiding damage to the airbag 105 caused by the material.

[0039] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A double-sealed dome valve, comprising a valve body (11), a top plate (103), a valve core (104) and an air bag (105), wherein the top plate (103) is movably arranged in the valve body (11), characterized in that: A threaded groove is provided on the inner wall surface of the middle channel of the top plate (103), the top plate (103) is threadedly connected with a sealing seat (101), a sealing ring (102) is provided at the bottom end of the sealing seat (101), and the sealing ring (102) is tightly fitted with the valve core (104).

2. The double-sealed dome valve according to claim 1, characterized in that: The valve body (11) is fixedly connected to a left shaft seat and a right shaft seat on both sides, respectively. A left rotating shaft and a right rotating shaft are respectively arranged in the left shaft seat and the right shaft seat, and the left rotating shaft and the right rotating shaft are respectively matched with the left shaft seat and the right shaft seat via wear-resistant sliding bearings.

3. The double-seal dome valve according to claim 1, characterized in that: The bottom ends of both sides of the valve core (104) are respectively matched with the left rotating shaft and the right rotating shaft through elastic pins.

4. The double-sealed dome valve according to claim 1, characterized in that: The top plate (103) is fixedly mounted on the top end of the valve body (11); an external threaded tooth (106) is provided on the outer wall surface of the sealing seat (101); the sealing seat (101) is threadedly connected to the top plate (103) via the external threaded tooth (106); a fastening bolt (107) is also provided between the sealing seat (101) and the top plate (103); and the sealing seat (101) is fastened via the fastening bolt (107).

5. The double-seal dome valve according to claim 1, characterized in that: A mounting groove is provided on the bottom wall surface of the sealing seat (101), and the sealing ring (102) is fixedly mounted in the mounting groove.

6. The double-seal dome valve according to claim 1, characterized in that: A support ring is arranged inside the airbag (105), and a ventilation groove is arranged on the support ring. An air inlet hole is arranged on one side of the top plate (103). The ventilation groove on the support ring is in communication with the air inlet hole on the top plate (103). The airbag (105) is fixed between the top plate (103) and the valve body (11). When the valve core (104) is closed in place, the airbag (105) is inflated and fits the valve core (104).

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