CN217234508U - Low-pressure-difference swing check valve with auxiliary opening device - Google Patents
Low-pressure-difference swing check valve with auxiliary opening device Download PDFInfo
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- CN217234508U CN217234508U CN202120766038.5U CN202120766038U CN217234508U CN 217234508 U CN217234508 U CN 217234508U CN 202120766038 U CN202120766038 U CN 202120766038U CN 217234508 U CN217234508 U CN 217234508U
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- ejector rod
- opening device
- valve
- auxiliary opening
- positioning step
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Abstract
This novel check valve that belongs to, concretely relates to low pressure difference swing check valve of opening device is assisted in area. A low-pressure-difference swing check valve with an auxiliary opening device is characterized in that the auxiliary opening device is arranged at the bottom of a valve body and comprises a push rod sleeve, a nut, a push rod and an O-shaped ring. This neotype effect that is showing is: this novel take auxiliary opening device's low pressure difference swing check valve has eliminated the valve and has not opened the situation at low pressure difference valve lamella.
Description
Technical Field
This novel check valve that belongs to, concretely relates to low pressure difference swing check valve of opening device is assisted in area.
Background
The swing check valve is a valve commonly used in a water conveying pipeline, the valve clack is integrally coated with rubber, the swing check valve with a large caliber is heavy in weight, the valve clack can be adsorbed on the surface of a sealing surface of a valve body under the closed state for a long time, and the situation that the valve clack cannot be opened can occur when the pressure difference (the difference between the pressure of an inlet end and the pressure of an outlet end) is low.
In the prior art, the normal opening of the valve is not guaranteed, and the valve capable of avoiding the above situation is needed, so that a low-pressure-difference swing check valve with an auxiliary opening device is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a take supplementary opening device's low dropout swing check valve. Under the low pressure difference, when the valve can not be normally opened, the valve is opened through the device, and the normal operation of the valve is ensured.
This is novel to realize like this: a low-pressure-difference swing check valve with an auxiliary opening device is characterized in that the auxiliary opening device is arranged at the bottom of a valve body and comprises a push rod sleeve, a nut, a push rod and an O-shaped ring.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the inner hole for installing the auxiliary opening device and the positioning step are arranged at the bottom of the valve body.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the ejector rod sleeve is arranged in the inner hole in the bottom of the valve body, and is provided with the external thread, the internal thread, the external positioning step and the internal positioning step.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the outer circle of the ejector rod sleeve is matched with the inner hole of the valve body, an O-shaped ring is arranged between the outer circle of the ejector rod sleeve and the inner hole of the valve body for sealing, and the outer positioning step of the ejector rod sleeve is contacted with the positioning step of the valve body to play a role in positioning the ejector rod sleeve.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the nut is matched with the external thread of the ejector rod sleeve to lock the ejector rod sleeve.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the ejector rod is provided with the square body, the external thread, the positioning step and the spherical crown surface.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the external threads of the ejector rod are matched with the internal threads of the ejector rod sleeve; the ejector rod positioning step is contacted with the ejector rod sleeve positioning step; an O-shaped ring is arranged between the ejector rod and the ejector rod sleeve for sealing.
The low-pressure-difference swing check valve with the auxiliary opening device is characterized in that the auxiliary opening is realized by the following steps: an operating hand wheel is sleeved on the square body of the ejector rod, the ejector rod rotates anticlockwise, the ejector rod extends out, and the valve clack is ejected by the spherical crown surface of the ejector rod. After the valve clack is jacked open, the valve clack rotates clockwise until the ejector rod returns to the original position.
This neotype effect that is showing is: this novel take auxiliary opening device's low pressure difference swing check valve has eliminated the valve and has not opened the situation at low pressure difference valve lamella.
Drawings
Fig. 1 is a schematic view of a low differential pressure swing check valve with an auxiliary opening device.
Fig. 2 is a partially enlarged schematic view of the auxiliary opening device.
FIG. 3 is a schematic illustration of a lift pin.
Fig. 4 is a schematic view of the ejector pin sleeve.
In the figure: 1. the valve comprises a valve body, 2, a valve clack, 3, a push rod, 4, an O-shaped ring, 5, an O-shaped ring, 6, a push rod sleeve, 7, a nut, 31, a square body, 32, an external thread, 33, a positioning step, 34 spherical crown surfaces, 61, an external thread, 62, an internal thread, 63, an external positioning step, 64, an internal positioning step, 65 and an external circle.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
This novel take low dropout swing check valve of supplementary opening device. As shown in fig. 1 and fig. 1, an auxiliary opening device is arranged at the bottom of the valve body 1, and the auxiliary opening device comprises a push rod sleeve 6, a nut 7, a push rod 3, an O-ring 4 and an O-ring 5.
According to the low-pressure-difference swing check valve with the auxiliary opening device, the inner hole for installing the auxiliary opening device and the positioning step are arranged at the bottom of the valve body 1.
As shown in fig. 2, a push rod sleeve 6 is arranged in an inner hole at the bottom of the valve body 1; as shown in FIG. 4, the ejector rod sleeve is provided with an external thread 61, an internal thread 62, an external positioning step 63 and an internal positioning step 64.
As shown in figure 2, an outer circle 65 of the ejector rod sleeve 6 is matched with an inner hole of the valve body, an O-shaped ring 5 is arranged between the outer circle 65 and the inner hole for sealing, and the outer positioning step 63 is in contact with the valve body positioning step to play a role in positioning the ejector rod sleeve 6.
According to the low-pressure-difference swing check valve with the auxiliary opening device, as shown in fig. 2, the nut 7 is matched with the external thread 61 of the ejector rod sleeve 6 to lock the ejector rod sleeve 6.
As shown in FIG. 3, the push rod 3 is provided with a square body 31, an external thread 32, a positioning step 33 and a spherical crown surface 34.
As shown in figure 2, the external thread 32 of the mandril 3 is matched with the internal thread 62 of the mandril sleeve 6; the positioning step 33 of the ejector rod 3 is contacted with the positioning step 64 in the ejector rod sleeve 6, and under the condition that the valve is closed, the distance between the top end of the spherical crown surface 34 of the ejector rod 3 and the surface of the valve clack 2 is 3-4mm, so that the valve can be normally closed; an O-shaped ring 4 is arranged between the ejector rod 3 and the ejector rod sleeve 6 for sealing.
The low-pressure-difference swing check valve with the auxiliary opening device is characterized in that the auxiliary opening is realized by the following steps: an operation hand wheel is sleeved on the square body 31 of the ejector rod 3, the ejector rod 3 rotates anticlockwise, the ejector rod 3 extends out, and the spherical crown surface 34 of the ejector rod 3 props open the valve clack 2. After the valve clack 2 is jacked open, the valve clack rotates clockwise until the mandril 3 returns to the original position.
Claims (3)
1. The utility model provides a low dropout swing check valve of opening device is assisted in area which characterized in that: an auxiliary opening device is arranged at the bottom of the valve body (1), and comprises a push rod sleeve (6), a nut (7), a push rod (3) and an O-shaped ring;
an inner hole for installing an auxiliary opening device and a positioning step are arranged at the bottom of the valve body (1);
a mandril sleeve (6) is arranged in an inner hole at the bottom of the valve body (1); the ejector rod is sleeved with an external thread, an internal thread (62), an external positioning step (63) and an internal positioning step (64);
an outer circle (65) of the ejector rod sleeve (6) is matched with an inner hole of the valve body, an O-shaped ring seal is arranged between the ejector rod sleeve (6) and the valve body, and an outer positioning step (63) is contacted with a positioning step of the valve body to play a role in positioning the ejector rod sleeve (6);
the nut (7) is matched with the external thread of the ejector rod sleeve (6) to lock the ejector rod sleeve (6).
2. A low-differential-pressure swing check valve with an auxiliary opening device as defined in claim 1, wherein: the ejector rod (3) is provided with a square body (31), an external thread, a positioning step (33) and a spherical crown surface (34).
3. The low-differential-pressure swing check valve with an auxiliary opening device as claimed in claim 2, wherein: the external thread of the mandril (3) is matched with the internal thread (62) of the mandril sleeve (6); the positioning step (33) of the ejector rod (3) is contacted with the inner positioning step (64) of the ejector rod sleeve (6), and under the condition that the valve is closed, the distance between the top end of the spherical crown surface (34) of the ejector rod (3) and the valve clack (2) is 3-4mm, so that the valve can be normally closed; an O-shaped ring seal is arranged between the ejector rod (3) and the ejector rod sleeve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120766038.5U CN217234508U (en) | 2021-04-15 | 2021-04-15 | Low-pressure-difference swing check valve with auxiliary opening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120766038.5U CN217234508U (en) | 2021-04-15 | 2021-04-15 | Low-pressure-difference swing check valve with auxiliary opening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217234508U true CN217234508U (en) | 2022-08-19 |
Family
ID=82818055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120766038.5U Active CN217234508U (en) | 2021-04-15 | 2021-04-15 | Low-pressure-difference swing check valve with auxiliary opening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217234508U (en) |
-
2021
- 2021-04-15 CN CN202120766038.5U patent/CN217234508U/en active Active
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