CN210344500U - Gas butterfly valve with over-torque protection device - Google Patents
Gas butterfly valve with over-torque protection device Download PDFInfo
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- CN210344500U CN210344500U CN201920842982.7U CN201920842982U CN210344500U CN 210344500 U CN210344500 U CN 210344500U CN 201920842982 U CN201920842982 U CN 201920842982U CN 210344500 U CN210344500 U CN 210344500U
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- valve
- valve rod
- stop
- gasket
- protection device
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- 238000007789 sealing Methods 0.000 claims abstract description 40
- 230000007704 transition Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a gas butterfly valve with an over-torque protection device in the technical field of valves, which comprises a valve rod, a butterfly plate, a handle, a valve cover and a valve body; the head of the valve rod is fixedly sleeved with a stop gasket, and the plate surface of the stop gasket is vertical to the axis of the valve rod; a notch is formed on the edge of the stop gasket, the notch is provided with two flanges, and a stop screw which is always positioned in the notch is connected to the valve cover through threads; when the valve rod rotates to the opening position and the closing position, the stop screws respectively abut against the two flanges of the stop gasket. The stop gasket is mainly arranged to accurately limit the rotating angle range of the valve rod, so that the situations of valve rod breakage, butterfly plate sealing element damage failure and butterfly plate damage caused by manual rough operation or wrong torque operation are prevented.
Description
Technical Field
The utility model relates to the technical field of valves, particularly, be a gas butterfly valve.
Background
The gas butterfly valve has the characteristics of compact structure and small flow resistance, is widely applied to gas pipelines and is an opening and closing valve. When the pipeline needs to be cut off or stop using gas, the handle is rotated clockwise, the valve is closed, and the medium in the pipeline is cut off; when gas is needed to be used in the pipeline, the handle is rotated anticlockwise, the valve is opened, and the medium in the pipeline is communicated. However, in practical use, the valve rod is broken, the butterfly plate sealing element is damaged and fails, the butterfly plate is damaged, and the gas pipeline has to be stopped to replace the valve, so that normal gas consumption of downstream users is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a take over moment protection device's gas butterfly valve mainly comes the rotatory angle scope of accurate injeciton valve rod through setting up the backstop gasket to prevent that the situation that valve rod fracture, butterfly plate sealing member damage became invalid, the butterfly plate damages that manual brutal force operation or mistake moment operation lead to.
The purpose of the utility model is realized like this: a gas butterfly valve with an over-torque protection device comprises a valve rod, a butterfly plate, a handle, a valve cover and a valve body with a valve body cavity channel, wherein the valve cover is arranged at the upper end of the valve body, the valve body is provided with a valve rod mounting hole, the valve rod is rotatably arranged in the valve rod mounting hole of the valve body in a penetrating mode and rotates around the axis of the valve rod, the head of the valve rod penetrates through an inner cavity of the valve cover and is connected with the handle, the butterfly plate is arranged on the valve rod and is located in the valve body cavity channel, butterfly plate sealing elements are arranged on the upper side and the lower side of the butterfly plate, and gaps between the butterfly plate and the valve;
the head of the valve rod is fixedly sleeved with a stop gasket, and the plate surface of the stop gasket is perpendicular to the axis of the valve rod;
a notch is formed in the edge of the stop gasket, the notch is provided with two flanges, and a stop screw which is always positioned in the notch is connected to the valve cover in a threaded manner;
when the valve rod rotates to the opening position and the closing position, the stop screws respectively abut against the two flanges of the stop gasket.
Further, a valve rod sealing ring is coaxially sleeved on the valve rod and seals a gap between the valve rod and the valve rod mounting hole, and the valve rod sealing ring is located below the stop gasket and above the cavity channel of the valve body.
Further, the flanges are provided with arc sections, and when the valve rod rotates to the opening or closing position, the arc section of one flange is completely contacted with the outer circle edge of the screw head part of the stop screw.
Further, a sealing check ring is coaxially sleeved on the valve rod and used for sealing a gap between the valve rod and the valve rod mounting hole, and the sealing check ring is located below the valve rod sealing ring and above the cavity channel of the valve body.
Further, the hardness of the joint of the valve rod head and the stop gasket is higher than that of the stop gasket.
Further, the stop washer is sleeved on the valve rod in a clearance fit mode.
Furthermore, the notch is provided with an arc transition section which is smoothly connected with the two flanges.
The beneficial effects of the utility model reside in that:
1) due to the arrangement of the stop gasket, the rotating angle range of the valve rod can be accurately limited, so that the situations of valve rod fracture, butterfly plate sealing element damage failure and butterfly plate damage caused by manual rough operation or wrong over-torque operation can be prevented;
2) because the valve rod sealing ring is arranged, the valve rod sealing ring seals a gap between the valve rod and the valve rod mounting hole, and the valve rod sealing ring is positioned below the stop gasket and above the cavity channel of the valve body, the valve can be disassembled without stopping gas after the stop gasket is damaged, the stop gasket can be replaced on line, and gas can not leak due to the sealing action of the valve rod sealing ring, so that the operation is convenient and efficient, and the normal use of a gas station is not influenced;
3) the stop gasket can be in full arc contact fit with the outer circular edge of the screw head part of the stop screw when in contact, so that the stop screw can be in full contact with the stop gasket when the stop gasket is in an opening state and a closing state, the stress area is increased, the opening and closing precision of the valve is ensured, and the stop gasket is not damaged before being damaged;
4) the hardness of the matched part of the head part of the valve rod and the stopping gasket is higher than that of the stopping gasket, so that the stopping gasket is damaged preferentially when the valve rod is in an intact state during over-torque operation, and internal parts such as the valve rod, the butterfly plate sealing element and the like are protected;
5) the precision of clearance fit between the stop gasket and the valve rod can be controlled, the contact area between the stop gasket and the valve rod is controlled within a certain range, and when the excessive moment operation (for example, more than 70N.m) is achieved, the valve rod can smoothly damage the stop gasket to achieve the effect of protecting internal parts.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the present invention.
Fig. 3 is a schematic view of the structure of fig. 2 from the S-direction viewing angle.
Fig. 4 is a schematic view illustrating the principle of the open/close state of the present invention.
In the figure, 1 backstop gasket, 101 flange, 101a circular arc section, 102 breach, 103 circular arc changeover portion, 2 valve rods, 3 backstop screws, 4 valve rod sealing rings, 5 sealing check rings, 6 valve bodies, 6a valve body cavities, 6b valve rod mounting holes, 7 butterfly plates, 8 butterfly plate sealing elements, 9 handles, 10 valve covers.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-3, a gas butterfly valve with an over-torque protection device comprises a valve rod 2, a butterfly plate 7, a handle 9, a valve cover 10 and a valve body 6 with a valve body cavity 6a, wherein the valve cover 10 is arranged at the upper end of the valve body 6, the valve body 6 is provided with a valve rod mounting hole 6b, the valve rod 2 is rotatably arranged in the valve rod mounting hole 6b of the valve body 6 in a penetrating manner and rotates around the axis of the valve rod, the head of the valve rod 2 penetrates through an inner cavity of the valve cover 10 and is connected with the handle 9, the butterfly plate 7 is arranged on the valve rod 2 and is positioned in the valve body cavity 6a, butterfly plate sealing elements 8 are arranged on the upper side and the lower side of the butterfly plate 7, and the butterfly plate sealing elements.
The head of the valve rod 2 is fixedly sleeved with a stop gasket 1, and the surface of the stop gasket 1 is vertical to the axis of the valve rod 2; a notch 102 is formed on the edge of the stop gasket 1, the notch 102 is provided with two flanges 101, and the valve cover 10 is in threaded connection with a stop screw 3 which is always positioned in the notch 102; as shown in fig. 4, when the valve rod 2 rotates to the opening and closing positions, the stop screws 3 respectively abut against the two flanges 101 of the stop gasket 1, the opening angle of the notch 102 is 90 °, and when the valve is used, the valve can be opened and closed by rotating the handle 9 by 90 °.
When the handle 9 is held to rotate the valve rod 2, the stop washer 1 also rotates along with the valve rod 2, when the valve rod 2 rotates to an opening or closing position, one of the flanges 101 of the notch 102 of the stop washer 1 is abutted against the stop screw 3, so that the valve rod 2 can stop rotating immediately, and the valve rod 2 is prevented from rotating over the position.
The valve rod 2 is coaxially sleeved with a valve rod sealing ring 4, the valve rod sealing ring 4 seals a gap between the valve rod 2 and the valve rod mounting hole 6b, and the valve rod sealing ring 4 is positioned below the stop gasket 1 and above the valve body cavity 6 a. After the backstop gasket 1 is damaged, the valve is not required to be disassembled after air stopping, the backstop gasket 1 can be replaced on line, and due to the sealing effect of the valve rod sealing ring 4, gas cannot leak, so that the operation is convenient and efficient, and the normal use of a gas station is not influenced. The valve rod 2 is coaxially sleeved with a sealing check ring 5, the sealing check ring 5 seals a gap between the valve rod 2 and the valve rod mounting hole 6b, and the sealing check ring 5 is positioned below the valve rod sealing ring 4 and above the valve body cavity 6 a. So as to further ensure the air tightness of the valve.
The ribs 101 have circular arc sections 101a, and when the valve rod 2 is rotated to the opening or closing position, the circular arc section 101a of one of the ribs 101 is completely contacted with the outer circular edge of the head portion of the stop screw 3. The backstop gasket 1 can form full circular arc contact cooperation with the outer disc of the spiral shell head portion of backstop screw 3 when contacting, makes backstop gasket 1 when opening state, closed condition, and the outer disc of the spiral shell head portion of backstop screw 3 can contact with backstop gasket 1 completely, increases the lifting surface area, has both guaranteed the precision of opening and close of valve, makes backstop gasket 1 before damaging again, is unlikely to make backstop screw 3 damage.
The hardness of the joint of the head of the valve rod 2 and the stop gasket 1 is higher than that of the stop gasket 1. In the case of an over-torque operation, the valve rod 2 is preferably damaged in the intact state by the stop washer 1, so that the valve rod 2, the butterfly plate 7, the butterfly plate seal 8 and other internal parts are protected.
The stop washer 1 is fitted to the valve rod 2 in a clearance fit manner. The precision of clearance fit between the stop gasket 1 and the valve rod 2 can be controlled, the contact area between the stop gasket 1 and the valve rod 2 is controlled within a certain range, and when the excessive moment operation (for example, more than 70N.m) is achieved, the valve rod 2 can smoothly damage the stop gasket 1 to achieve the effect of protecting internal parts.
The notch 102 has a circular transition section 103, and the circular transition section 103 smoothly connects the two flanges 101.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements on the above embodiments without departing from the general concept of the present invention, and such changes or improvements should fall within the protection scope of the present invention.
Claims (7)
1. A gas butterfly valve with an over-torque protection device comprises a valve rod (2), a butterfly plate (7), a handle (9), a valve cover (10) and a valve body (6) with a valve body cavity (6a), the valve cover (10) is arranged at the upper end of the valve body (6), the valve body (6) is provided with a valve rod mounting hole (6b), the valve rod (2) is rotatably arranged in a valve rod mounting hole (6b) of the valve body (6) in a penetrating way and rotates around the axis of the valve rod mounting hole, the head of the valve rod (2) passes through the inner cavity of the valve cover (10) and is connected with the handle (9), the butterfly plate (7) is arranged on the valve rod (2) and is positioned in the valve body cavity channel (6a), butterfly plate sealing member (8) are all installed to butterfly plate (7) upper and lower side, butterfly plate sealing member (8) seal up the clearance between butterfly plate (7) and valve body chamber way (6a), its characterized in that:
the head of the valve rod (2) is fixedly sleeved with a stop gasket (1), and the surface of the stop gasket (1) is vertical to the axis of the valve rod (2);
a notch (102) is formed in the edge of the stop gasket (1), the notch (102) is provided with two flanges (101), and a stop screw (3) which is always positioned in the notch (102) is connected to the valve cover (10) in a threaded manner;
when the valve rod (2) rotates to the opening and closing positions, the stop screws (3) respectively abut against the two flanges (101) of the stop gasket (1).
2. The gas butterfly valve with the over-torque protection device according to claim 1, wherein: the valve rod (2) is coaxially sleeved with a valve rod sealing ring (4), the valve rod sealing ring (4) seals a gap between the valve rod (2) and the valve rod mounting hole (6b), and the valve rod sealing ring (4) is located at a position below the stop gasket (1) and above the valve body cavity channel (6 a).
3. The gas butterfly valve with the over-torque protection device according to claim 1, wherein: the flanges (101) are provided with arc sections (101a), and when the valve rod (2) rotates to the opening or closing position, the arc section (101a) of one of the flanges (101) is completely contacted with the outer circular edge of the screw head of the stop screw (3).
4. The gas butterfly valve with the over-torque protection device according to claim 2, wherein: the valve is characterized in that a sealing check ring (5) is coaxially sleeved on the valve rod (2), the sealing check ring (5) seals a gap between the valve rod (2) and the valve rod mounting hole (6b), and the sealing check ring (5) is located at a position below the valve rod sealing ring (4) and above the valve body cavity channel (6 a).
5. The gas butterfly valve with the over-torque protection device according to claim 1, wherein: the hardness of the matching part of the head of the valve rod (2) and the stop gasket (1) is higher than that of the stop gasket (1).
6. The gas butterfly valve with the over-torque protection device according to claim 5, wherein: the stop washer (1) is sleeved on the valve rod (2) in a clearance fit mode.
7. The gas butterfly valve with the over-torque protection device according to claim 1, wherein: the notch (102) is provided with an arc transition section (103), and the arc transition section (103) is smoothly connected with the two flanges (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920842982.7U CN210344500U (en) | 2019-06-05 | 2019-06-05 | Gas butterfly valve with over-torque protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920842982.7U CN210344500U (en) | 2019-06-05 | 2019-06-05 | Gas butterfly valve with over-torque protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210344500U true CN210344500U (en) | 2020-04-17 |
Family
ID=70184804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920842982.7U Active CN210344500U (en) | 2019-06-05 | 2019-06-05 | Gas butterfly valve with over-torque protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210344500U (en) |
-
2019
- 2019-06-05 CN CN201920842982.7U patent/CN210344500U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A gas butterfly valve with over torque protection device Granted publication date: 20200417 Pledgee: Bank of China Limited by Share Ltd. Shanghai Jingan branch Pledgor: SHANGHAI FIORENTINI GAS EQUIPMENT Co.,Ltd. Registration number: Y2024310000385 |