CN211144923U - Pressure balance type protective cover - Google Patents
Pressure balance type protective cover Download PDFInfo
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- CN211144923U CN211144923U CN201922116108.8U CN201922116108U CN211144923U CN 211144923 U CN211144923 U CN 211144923U CN 201922116108 U CN201922116108 U CN 201922116108U CN 211144923 U CN211144923 U CN 211144923U
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- cover body
- valve
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Abstract
The utility model discloses a pressure balance type protective cover, which is used on a submersible tubular pump and comprises a cover body and a pressure balance cylinder, wherein the cover body is fixed on a guide vane supporting body of the submersible tubular pump, and the interior of the cover body forms an airtight space; the pressure balance cylinder is connected to the cover body and comprises a cylinder barrel and a piston, the cylinder barrel is fixed to the cover body, a sliding cavity which is communicated along the axial direction is formed in the cylinder barrel, the piston is connected to the sliding cavity in a sliding mode, and the pressure difference between the inside and the outside of the cover body drives the piston to slide so that the pressure inside and the outside of the cover body is balanced. By adopting the structure, the piston of the pressure balance cylinder can sense the pressure change in the flow channel, the internal and external pressures of the protective cover are kept in a balanced state, the internal and external pressure difference of the sealing device is ensured in a smaller range, and the reliability of sealing and water stopping is improved.
Description
Technical Field
The utility model relates to the field of fluid machinery, especially, relate to a pressure balance formula safety cover.
Background
The submersible tubular pump is directly arranged in a flow channel by connecting a water pump impeller, a rear guide vane, a hydraulic motor and the like into a whole, and the pump unit section forms a whole body which is convenient for integral hoisting, is convenient to install and is particularly suitable for being matched with a movable drainage vehicle for use. Because the existing hydraulic motor is soaked in water for working for a long time, the requirement of the existing hydraulic pressure on the working environment is damaged, and meanwhile, the shape of the flow channel is extremely irregular due to the appearance of the hydraulic motor, so that the working efficiency of the whole unit is invisibly reduced.
Disclosure of Invention
An object of the utility model is to provide a do reliably, can feel the pressure variation in the runner, guarantee inside and outside pressure differential at less within range, improved the pressure balance formula safety cover of sealed stagnant water reliability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pressure balance type protective cover is used on a submersible tubular pump and comprises a cover body and a pressure balance cylinder, wherein the cover body is fixed on a guide vane supporting body of the submersible tubular pump, a closed space is formed inside the cover body, a hydraulic motor of the submersible tubular pump is arranged in the closed space inside the cover body, and the closed space is filled with hydraulic oil; the pressure balance cylinder is connected to the cover body and comprises a cylinder barrel and a piston, the cylinder barrel is fixed to the cover body, a sliding cavity which is communicated along the axial direction is formed in the cylinder barrel, the piston is connected to the sliding cavity in a sliding mode, and the pressure difference between the inside and the outside of the cover body drives the piston to slide so that the pressure inside and the outside of the cover body is balanced.
The cover body is connected with a liquid filling valve and an exhaust valve.
The liquid filling valve comprises a first valve body, a valve seat, a compression spring, a valve ball, a locking elastic sheet and a sealing bolt, wherein the first valve body is fixed on the cover body, the valve seat is fixed on the first valve body, a valve cavity communicated with the inside of the cover body is arranged in the valve seat, one end of the compression spring is connected to one end of the valve cavity facing the inside of the cover body, the other end of the compression spring is connected with the valve ball, one end, far away from the inside of the cover body, of the valve cavity is provided with a liquid filling port, the compression spring drives the valve ball to block the liquid filling port, one end, far away from the inside of the cover body, of the first valve body is provided with a threaded port, the sealing bolt is in the threaded.
The exhaust valve comprises a second valve body and a valve core, the second valve body is fixed on the cover body, a cavity communicated with the interior of the cover body is arranged on the second valve body, an exhaust hole is formed in one end, facing the cover body, of the cavity, the upper portion of the valve core is in threaded connection with the valve body, a conical portion is arranged at the bottom of the valve core, and the conical portion is inserted into and blocks the exhaust hole.
One of the sliding cavity facing the interior of the cover body is provided with a limiting shaft shoulder, one end of the sliding cavity far away from the interior of the cover body is provided with a check ring, and the piston is limited to slide between the limiting shaft shoulder and the check ring.
And a sealing ring is embedded in the outer circular wall of the piston and is tightly attached to the inner wall of the sliding cavity to realize dynamic sealing.
The bottom of the cover body is provided with an end flange, the end flange is connected and fixed on the guide vane supporting body through a locking bolt, and a sealing strip is arranged between the end flange and the guide vane supporting body.
The utility model adopts the above technique, following beneficial effect has: the piston of the pressure balance cylinder can sense the pressure change in the flow channel, the internal and external pressures of the protective cover are kept in a balanced state, the internal and external pressure difference of the sealing device is ensured to be in a small range, and the sealing and water stopping reliability is improved. The utility model discloses simple structure, safe and reliable.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments;
FIG. 1 is a general schematic view of a protective cover of the present invention;
FIG. 2 is a schematic structural view of a pressure balance cylinder;
FIG. 3 is a schematic structural view of a prefill valve;
fig. 4 is a schematic structural view of the exhaust valve.
Detailed Description
As shown in one of fig. 1-4, the pressure balance type protective cover of the present invention is used for a submersible tubular pump, and comprises a cover body 1 and a pressure balance cylinder 2, wherein the cover body 1 is fixed on a guide vane supporting body 3 of the submersible tubular pump, and an enclosed space is formed inside the cover body, a hydraulic motor 4 of the submersible tubular pump is arranged in the enclosed space inside the cover body 1, and the enclosed space is filled with hydraulic oil; the pressure balance cylinder 2 is connected to the cover body 1, the pressure balance cylinder 2 comprises a cylinder barrel 21 and a piston 22, the cylinder barrel 21 is fixed on the cover body 1, a sliding cavity which is through along the axial direction is arranged inside the cylinder barrel 21, the piston 22 is connected in the sliding cavity in a sliding mode, and the pressure difference between the inside and the outside of the cover body 1 drives the piston 22 to slide so that the pressure inside and the pressure outside the cover body 1 are balanced.
The cover body 1 is connected with a liquid filling valve 5 and an exhaust valve 6. The charge valve 5 and the discharge valve 6 are not limited to be mounted on a protective cover, but may be mounted on a casing of a submersible tubular pump through a pipe.
The liquid filling valve 5 comprises a first valve body 51, a valve seat 52, a compression spring 53, a valve ball 54, a locking elastic sheet 55 and a sealing bolt 56, wherein the first valve body 51 is fixed on the cover body 1, the valve seat 52 is fixed on the first valve body 51, a valve cavity communicated with the interior of the cover body 1 is arranged in the valve seat 52, one end of the compression spring 53 is connected to one end, facing the interior of the cover body 1, of the valve cavity, the other end of the compression spring 53 is fixedly connected with the valve ball 54, a liquid filling port is arranged at one end, far away from the interior of the cover body 1, of the valve cavity, the compression spring 53 drives the valve ball to block the liquid filling port, a threaded port is formed at one end, far away from the interior of the cover body 1, of the first valve body 51, the sealing bolt 56 is in the threaded.
The exhaust valve 6 comprises a second valve body 61 and a valve core 62, the second valve body 61 is fixed on the cover body 1, a cavity communicated with the inside of the cover body 1 is arranged on the second valve body 61, an exhaust hole is formed in one end, facing the cover body 1, of the cavity, the upper portion of the valve core 62 is in threaded connection with the second valve body 61, a conical portion is arranged at the bottom of the valve core 62, and the conical portion is inserted into and seals the exhaust hole.
One of the sliding cavity towards the inside of the cover body 1 is provided with a limiting shaft shoulder, one end of the sliding cavity far away from the inside of the cover body 1 is provided with a retaining ring 23, and the piston 22 is limited to slide between the limiting shaft shoulder and the retaining ring 23.
And a sealing ring 24 is embedded in the outer circular wall of the piston 22, and the sealing ring 24 is tightly attached to the inner wall of the sliding cavity to realize dynamic sealing.
The bottom of the cover body 1 is provided with an end flange 11, the end flange 11 is connected and fixed on the guide vane supporting body 3 through a locking bolt, and a sealing strip is arranged between the end flange 11 and the guide vane supporting body 3.
The utility model discloses a theory of operation: the protective cover separates the hydraulic motor from the conveying fluid, and is designed into a resistance-reducing shape, so that the protective cover is filled with hydraulic oil for good heat dissipation of the hydraulic motor, and meanwhile, lubricating liquid is provided for the bearing.
The piston 22 of the pressure balance cylinder 2 can move along the axis of the cylinder 21, and senses the pressure change of the flow passage, so that the pressure in the sealed space of the cover body 1 is balanced with the pressure in the flow passage 7, the lower pressure difference borne by the sealing element is realized, and the sealing reliability is improved.
In the process of oil filling, the sealing bolt 56 is taken down from the threaded port, an oil pipe of the oil filling equipment is connected to the threaded port, the exhaust valve 6 is adjusted to the highest point, the exhaust valve 6 is loosened by a small amount, and then oil filling is started. And in the oil filling process, observing the exhaust state of the exhaust valve 6, closing the exhaust valve 6 when oil flows out, stopping filling the oil, taking down the oil pipe, and screwing the sealing bolt 56.
The practice of the present invention has been described with reference to the accompanying drawings, but the invention is not limited to the embodiments described above, which are illustrative rather than limiting, and it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. The utility model provides a pressure balance formula safety cover for on the dive tubular pump which characterized in that: the hydraulic motor of the submersible tubular pump is arranged in the closed space in the cover body, and the closed space is filled with hydraulic oil; the pressure balance cylinder is connected to the cover body and comprises a cylinder barrel and a piston, the cylinder barrel is fixed to the cover body, a sliding cavity which is communicated along the axial direction is formed in the cylinder barrel, the piston is connected to the sliding cavity in a sliding mode, and the pressure difference between the inside and the outside of the cover body drives the piston to slide so that the pressure inside and the outside of the cover body is balanced.
2. The pressure-balanced protective cover of claim 1, wherein: the cover body is connected with a liquid filling valve and an exhaust valve.
3. The pressure-balanced protective cover of claim 2, wherein: the liquid filling valve comprises a first valve body, a valve seat, a compression spring, a valve ball, a locking elastic sheet and a sealing bolt, wherein the first valve body is fixed on the cover body, the valve seat is fixed on the first valve body, a valve cavity communicated with the inside of the cover body is arranged in the valve seat, one end of the compression spring is connected to one end of the valve cavity facing the inside of the cover body, the other end of the compression spring is connected with the valve ball, one end, far away from the inside of the cover body, of the valve cavity is provided with a liquid filling port, the compression spring drives the valve ball to block the liquid filling port, one end, far away from the inside of the cover body, of the first valve body is provided with a threaded port, the sealing bolt is in the threaded.
4. The pressure-balanced protective cover of claim 2, wherein: the exhaust valve comprises a second valve body and a valve core, the second valve body is fixed on the cover body, a cavity communicated with the interior of the cover body is arranged on the second valve body, an exhaust hole is formed in one end, facing the cover body, of the cavity, the upper portion of the valve core is in threaded connection with the valve body, a conical portion is arranged at the bottom of the valve core, and the conical portion is inserted into and blocks the exhaust hole.
5. The pressure-balanced protective cover of claim 1, wherein: one of the sliding cavity facing the interior of the cover body is provided with a limiting shaft shoulder, one end of the sliding cavity far away from the interior of the cover body is provided with a check ring, and the piston is limited to slide between the limiting shaft shoulder and the check ring.
6. The pressure-balanced protective cover of claim 1, wherein: and a sealing ring is embedded in the outer circular wall of the piston and is tightly attached to the inner wall of the sliding cavity to realize dynamic sealing.
7. The pressure-balanced protective cover of claim 1, wherein: the bottom of the cover body is provided with an end flange, the end flange is connected and fixed on the guide vane supporting body through a locking bolt, and a sealing strip is arranged between the end flange and the guide vane supporting body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922116108.8U CN211144923U (en) | 2019-11-29 | 2019-11-29 | Pressure balance type protective cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922116108.8U CN211144923U (en) | 2019-11-29 | 2019-11-29 | Pressure balance type protective cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211144923U true CN211144923U (en) | 2020-07-31 |
Family
ID=71774898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922116108.8U Active CN211144923U (en) | 2019-11-29 | 2019-11-29 | Pressure balance type protective cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211144923U (en) |
-
2019
- 2019-11-29 CN CN201922116108.8U patent/CN211144923U/en active Active
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