CN210088017U - Micro-resistance slow-closing upper elbow bottom valve - Google Patents
Micro-resistance slow-closing upper elbow bottom valve Download PDFInfo
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- CN210088017U CN210088017U CN201920897118.7U CN201920897118U CN210088017U CN 210088017 U CN210088017 U CN 210088017U CN 201920897118 U CN201920897118 U CN 201920897118U CN 210088017 U CN210088017 U CN 210088017U
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- piston sleeve
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Abstract
The utility model relates to a micro-resistance slow-closing upper elbow bottom valve, which comprises an elbow, a sealer, a connecting rod, a piston sleeve and a connecting pipe; the sealer is arranged at the pipe orifice a of the elbow and consists of a sealer main body and a valve plate; the sealer main body, the valve plate, the connecting rod and the piston are sequentially pivoted; the piston is positioned in the piston sleeve with one closed end and the other open end; the piston sleeve is positioned outside the bent pipe, a notch is formed in the bent pipe, the opening end of the piston sleeve is connected with the bent pipe, and the notch of the bent pipe is completely covered; the sealer main body, the valve plate, the connecting rod, the piston and the piston sleeve jointly form a mechanism capable of converting the rotary motion of the valve plate into the linear motion of the piston; one end of the connecting pipe is connected with the closed end of the piston sleeve or a part close to the closed end, and the other end of the connecting pipe is connected with the bent pipe section between the piston sleeve and the bent pipe orifice a; the cross-sectional area of the piston sleeve is more than 30 times of that of the connecting pipe. The utility model discloses a slow process of closing of opening slowly of valve, application prospect is good.
Description
Technical Field
The utility model belongs to the technical field of the pipeline valve, a little resistance slow-closing bend bottom valve on water is related to.
Background
In the piping erection on the centrifugal pump pumps, need to carry out the start-up of watering to the centrifugal pump, for convenient operation and maintenance, the position in general pump house is less than the pond liquid level, adopts the mode of flowing backward to carry out the centrifugal pump watering, but to the application occasion that some pond liquid levels are lower, the pump house is built underground, and the operating expenses is high, will face the danger that the pump house was flooded moreover, so can choose to work from the form of inhaling the centrifugal pump or choosing the bottom valve to join in marriage ordinary centrifugal pump when choosing the centrifugal pump classification. The self-suction centrifugal pump has low operating efficiency and does not meet the requirements of energy conservation and environmental protection; the working mode that the bottom valve is matched with the common centrifugal pump is high in operation efficiency, good effects are achieved in application, but the overhaul of the bottom valve causes great obstacles to field operation, and the operation is extremely inconvenient because the whole inlet pipeline needs to be hoisted when the bottom valve needs to be overhauled.
The existing market develops a water-mounted bottom valve for solving the problem, although the maintenance and the overhaul are convenient, the water-mounted bottom valve has large resistance loss, so that the pressure loss of an inlet pipeline is caused, and meanwhile, the negative pressure at the inlet of the pump is reduced, so that a certain influence is caused on the cavitation of the pump, and the operation safety of the pump is seriously threatened; and current installation bottom valve simple structure on water, when the pump was started and is stopped, the valve plate was directly opened or is closed, and the pipeline can take place the water hammer phenomenon, is unfavorable for pipeline equipment's security, and causes the striking damage to sealed face, needs often to change sealed face sealed pad.
Therefore, the problems of large pipeline resistance loss and easy pipeline water hammer caused by installing the bottom valve on water are urgently solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the installation bottom valve on water causes the centrifugal pump import to inhale the pipeline resistance loss big and the pipeline takes place the water hammer phenomenon easily among the prior art, providing a little resistance slow-closing bend bottom valve on water.
In order to achieve the above purpose, the utility model adopts the following scheme:
the micro-resistance slow-closing upper bent pipe bottom valve comprises a bent pipe, a sealer, a connecting rod, a piston sleeve and a connecting pipe;
the sealer is arranged at the pipe orifice a of the elbow pipe and used for sealing the pipe orifice a, and consists of a sealer main body and a valve plate, wherein one side of the valve plate is pivoted with the sealer main body; the surface of the valve plate facing the elbow pipe is pivoted to one end of the connecting rod; the other end of the connecting rod is pivoted with the piston; the piston is positioned in the piston sleeve; the piston sleeve is a cylinder with one closed end and the other open end and is positioned outside the bent pipe, the bent pipe is provided with a notch, and the open end of the piston sleeve is connected with the bent pipe and completely covers the notch of the bent pipe;
the sealer main body, the valve plate, the connecting rod, the piston and the piston sleeve jointly form a mechanism capable of converting the rotary motion of the valve plate into the linear motion of the piston;
one end of the connecting pipe is connected with the closed end of the piston sleeve or a part close to the closed end, and the other end of the connecting pipe is connected with the elbow section between the piston sleeve and the elbow pipe orifice a, so that the piston sleeve and the elbow pipe are always kept in a communicated state when the piston moves; the cross-sectional area of the piston sleeve is more than 30 times of that of the connecting pipe.
As a preferable scheme:
the micro-resistance slow-closing water elbow bottom valve is characterized in that the elbow is 1/4 sections of a circular ring pipe, only one common elbow structure is listed here, and the micro-resistance slow-closing water elbow bottom valve can be applied to elbows of various structures; the piston sleeve is a cylinder.
The maximum rotation angle of the valve plate of the micro-resistance slow-closing water elbow bottom valve is 60-75 degrees; the length of the piston sleeve is equal to the length of the connecting rod, the thickness of the piston and the first stroke allowance; the length of the connecting rod is equal to the length of a connecting line between the cylinder opening of the piston sleeve and the center of the pipe opening a of the elbow pipe and the second stroke margin is equal to the diameter of the valve plate, so that the piston cannot slide out of the piston sleeve and is positioned in the piston sleeve in the whole movement process; the first stroke allowance is set to ensure that the valve plate can be completely opened within the range of machining errors, and the second stroke allowance is set to ensure that the piston is completely arranged in the sleeve when the valve plate is completely closed; the piston sleeve is vertically connected with the elbow, namely the central axis of the piston sleeve passes through the center of a circle corresponding to the elbow; the included angle between the central axis of the piston sleeve and the pipe orifice a of the elbow is 15-30 degrees.
The micro-resistance slow-closing upper bent pipe bottom valve has the first stroke allowance of 50mm and the second stroke allowance of 30 mm.
According to the micro-resistance slow-closing upper bent pipe bottom valve, the piston and the piston sleeve are in clearance fit, the fit clearance is 0.1-0.2 mm, and small clearance fit is adopted, so that friction can be effectively prevented, and a large amount of liquid flow can be effectively prevented from leaking; the cross section area of the piston sleeve is 30-50 times of that of the connecting pipe, so that the piston can only move slowly; the cross-sectional area of the elbow is 50-80 times of that of the piston sleeve, and the piston sleeve is far smaller than the size of the elbow due to the overall coordination consideration.
According to the micro-resistance slow-closing water elbow bottom valve, one side of the valve plate is pivoted to the sealer main body through the valve plate fixing assembly, and the valve plate fixing assembly consists of a fixing frame I, a fixing frame II, a nut, a bolt, a stop pad and a rotating rod;
one end part of the rotating rod is in a ring shape so as to be conveniently sleeved on the bolt, the other end part of the rotating rod is in a rectangular section so as to be conveniently and fixedly connected with the valve plate, and the fixing frame I, the rotating rod, the fixing frame II, the stop pad and the nut are sleeved on the bolt and are arranged from the head end to the tail end of the bolt;
keep 0.5 ~ 1mm clearance between mount I and mount II and the rotary rod, mount I and mount II and bolt fixed connection, simultaneously with sealer main part fixed connection, keep 0.2 ~ 0.5mm clearance between rotary rod and the bolt, guarantee that the rotary rod can freely rotate around the bolt, rotary rod and valve plate fixed connection, the locking pad is laminated with mount II and nut respectively.
According to the micro-resistance slow-closing water elbow bottom valve, the sealer main body is the lower flange with the sealing surface, the lower flange is fixedly connected with the elbow at the pipe opening a of the elbow, the pipelines are generally connected through the flange, and the sealer main body is the flange, so that the micro-resistance slow-closing water elbow bottom valve is conveniently connected with other pipelines.
The micro-resistance slow-closing water elbow bottom valve is characterized by further comprising an upper flange, wherein the upper flange is fixedly connected with the elbow at the pipe opening b of the elbow, and the upper flange and the lower flange have the same effect and are connected with other pipelines conveniently.
The utility model discloses a little hinders slowly to close return bend bottom valve on water, the inlet pipeline elbow pipe has the advantage that the resistance loss is little; the valve plate is arranged in the elbow, when the valve plate is fully opened, the impact of liquid flow to the valve plate is small, and the valve plate has a guiding effect on the liquid flow, so that the influence on the velocity vector of the liquid flow is small, the valve plate in the elbow is changed into a swing type from a traditional lifting type, when the valve plate rotates around a shaft, the pressure difference between two sides is reduced, the change on the direction of the liquid flow is less than 45 degrees, the impact loss is reduced, so that the resistance loss of the whole valve is greatly reduced, a connecting rod is arranged on the valve plate, when the valve plate rotates, a piston in a piston sleeve is driven by the connecting rod to do linear motion, a small-caliber connecting pipe is connected in the piston sleeve, when the valve plate is in a closed state, the piston sleeve is filled with liquid flow medium, when the valve plate is opened, the piston moves to compress the liquid flow in the piston sleeve, the, the piston can only move slowly, and the valve plate can only be opened completely after liquid flows through the connecting pipe and is completely discharged, so that the process of slowly opening the valve plate is realized;
in a similar way, after the centrifugal pump is stopped, under the action of gravity and the action of high-pressure liquid flow of the outlet pipeline, the liquid flow rapidly flows to the inlet pipeline, the valve plate in the prior art can be rapidly closed along with the liquid flow, the speed of the liquid flow close to the valve plate is rapidly reduced to zero at this time, the pressure is rapidly increased, and is conducted to the outlet pipeline, the liquid flow of the outlet pipeline still flows to the inlet pipeline due to the inertia effect, thus causing great impact pressure to the pipeline and threatening the safe operation, after the valve plate is adjusted by the piston sleeve, the valve plate rapidly falls down to drive the piston to rapidly move, thus, as the sectional area of the connecting pipe is far smaller than that of the piston sleeve, a certain vacuum is formed in the piston sleeve, therefore, the valve plate is prevented from being continuously closed, and then the valve plate is slowly closed through the water quantity supplemented by the connecting pipe, so that the impact damage to a sealing surface is reduced, and the water hammer phenomenon of a pipeline is avoided.
Has the advantages that:
(1) the micro-resistance slow-closing water elbow bottom valve of the utility model can be maintained or replaced only by loosening the pipeline connecting bolt during maintenance or overhaul due to installation on water, thereby reducing the maintenance time and the maintenance cost and facilitating the operation on site;
(2) the utility model discloses a little hinders slow-closing water return bend bottom valve installs in the inlet pipe way, through the mutual cooperation of valve plate, connecting rod, connecting pipe, piston and piston sleeve, has realized the slow-opening slow-closing process of valve, has effectively reduced the liquid stream refluence when centrifugal pump shut down and has caused the water hammer harm to the pipeline, reduces the hidden danger that the pipeline bursts or destroys, has increased the safety guarantee;
(3) the utility model discloses a little hinders slow-closing water return bend bottom valve, the return bend is to the guide effect and the valve plate structure of swing type of the liquid stream, has reduced the impact loss of liquid stream to a great extent, has reduced the resistance of import pipeline, improves the device efficiency of whole system;
(4) the utility model discloses a little hinders slowly-closing upper bend bottom valve, the inlet pipeline resistance loss reduces, and centrifugal pump import negative pressure reduces, effectively prevents the emergence of centrifugal pump cavitation phenomenon, provides effective guarantee for centrifugal pump equipment steady operation;
(5) the utility model discloses a little hinders slow shut-off return bend bottom valve on water, overall structure is simple, and processing preparation and maintenance are all very convenient, inhales the installation of pipeline for the centrifugal pump and provides the powerful guarantee, enlarges the range of application of centrifugal pump.
Drawings
FIG. 1 is a schematic view of the installation of the bottom valve of the micro-resistance slow-closing water elbow pipe of the present invention;
FIG. 2 is a schematic view of the bottom valve of the micro-resistance slow-closing water elbow pipe of the present invention;
FIG. 3 is a top view of the valve plate fixing assembly of the micro-resistance slow-closing upper elbow bottom valve of the present invention;
FIG. 4 is a front view of the valve plate fixing component of the micro-resistance slow-closing water elbow bottom valve of the present invention;
FIG. 5 is a left side view of the valve plate fixing component of the micro-resistance slow-closing upper elbow bottom valve of the present invention;
the device comprises a water tank 1, a water inlet pipeline 2, a water inlet pipeline 3, a micro-resistance slow-closing upper bent pipe bottom valve 4, an inlet straight pipe 5, a centrifugal pump 6, a lower flange 7, a connecting pipe 7, a piston sleeve 8, a piston 9, a connecting rod 10, a valve plate fixing component 11, a valve plate 12, a valve plate 13, a bent pipe 13, a pipe orifice a 13.1, a pipe orifice b 13.2, an upper flange 14, a fixing frame I15.1, a fixing frame II 15.2, a nut 16, a bolt 17, a stop pad 18 and a rotating rod 19.
Detailed Description
The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
The micro-resistance slow-closing upper bent pipe bottom valve comprises a bent pipe 13, a sealer, an upper flange 14, a connecting rod 10, a piston 9, a piston sleeve 8 and a connecting pipe 7, as shown in fig. 2;
the bent pipe is 1/4 sections of a circular ring pipe; the sealer is arranged at a pipe orifice a 13.1 of the elbow pipe and used for sealing the pipe orifice a 13.1, and consists of a sealer main body and a valve plate 12, wherein one side of the valve plate is pivoted to the sealer main body through a valve plate fixing component 11; the sealer main body is a lower flange 6 with a sealing surface, and is fixedly connected with the bent pipe at a pipe orifice a 13.1 of the bent pipe; the upper flange is fixedly connected with the elbow pipe at the pipe orifice b 13.2 of the elbow pipe;
as shown in fig. 3 to 5, the valve plate fixing assembly 11 is composed of a fixing frame I15.1, a fixing frame II 15.2, a nut 16, a bolt 17, a stop pad 18 and a rotating rod 19; one end of the rotating rod is in a ring shape, the other end of the rotating rod is in a rectangular cross section, and the fixing frame I, the rotating rod, the fixing frame II, the stop pad and the nut are sleeved on the bolt and arranged from the head end to the tail end of the bolt; a gap of 0.5-1 mm is kept between the fixing frame I and the fixing frame II and the rotating rod, the fixing frame I and the fixing frame II are fixedly connected with the bolt and are also fixedly connected with the sealer main body, a gap of 0.2-0.5 mm is kept between the rotating rod and the bolt, the rotating rod is fixedly connected with the valve plate, and the stop pad is respectively attached to the fixing frame II and the nut;
the surface of the valve plate facing the elbow pipe is pivoted to one end of the connecting rod, and the maximum rotation angle of the valve plate is 60-75 degrees;
the other end of the connecting rod is pivoted with the piston;
the piston is positioned in the piston sleeve;
the piston sleeve is a cylinder with one closed end and the other open end, is positioned outside the elbow and is vertically connected with the elbow (namely the central shaft of the piston sleeve passes through the center of a circle corresponding to the elbow), the included angle between the central shaft of the piston sleeve and the mouth a 13.1 of the elbow is 15-30 degrees, a notch is arranged on the elbow, and the open end of the piston sleeve is connected with the elbow and completely covers the notch of the elbow;
the sealer main body, the valve plate, the connecting rod, the piston and the piston sleeve jointly form a mechanism capable of converting the rotary motion of the valve plate into the linear motion of the piston; one end of the connecting pipe is connected with the closed end of the piston sleeve or a part close to the closed end, and the other end of the connecting pipe is connected with the bent pipe section between the piston sleeve and the bent pipe orifice a 13.1, so that the piston sleeve and the bent pipe are always kept in a communicated state when the piston moves;
the length of the piston sleeve is equal to the length of the connecting rod, the thickness of the piston and a first stroke allowance, and the first stroke allowance is 50 mm; the length of the connecting rod is equal to the length of a connecting line between the cylinder opening of the piston sleeve and the center of the pipe orifice a 13.1 of the elbow pipe and the second stroke allowance is equal to the diameter of the valve plate, and the second stroke allowance is 30 mm; the piston and the piston sleeve are in clearance fit, and the fit clearance is 0.1-0.2 mm; the cross-sectional area of the piston sleeve is 30-50 times of that of the connecting pipe, and the cross-sectional area of the elbow pipe is 50-80 times of that of the piston sleeve.
When in use, as shown in figure 1, the micro-resistance slow-closing water elbow bottom valve 3 is arranged on water, the lower flange 6 is connected with the water inlet pipeline 2, the upper flange 14 is connected with the inlet straight pipe 4, the water inlet straight pipe 4 is connected with the inlet of the centrifugal pump 5, and the water inlet pipeline 2 is submerged when extending into the water pool 1. The utility model discloses a little hinders slowly to close return bend bottom valve on water installs at the inlet line, through valve plate, connecting rod, connecting pipe, piston and piston sleeve's mutually supporting, has realized opening slowly and has closed the process of valve, and the liquid stream refluence when effectively having reduced the centrifugal pump shut down is to the water hammer harm that the pipeline caused, reduces the hidden danger that the pipeline bursts or destroys, has increased the safety guarantee.
Claims (8)
1. The micro-resistance slow-closing water elbow bottom valve is characterized in that: comprises a bent pipe, a sealer, a connecting rod, a piston sleeve and a connecting pipe;
the sealer is arranged at the pipe orifice a of the elbow pipe and used for sealing the pipe orifice a, and consists of a sealer main body and a valve plate, wherein one side of the valve plate is pivoted with the sealer main body; the surface of the valve plate facing the elbow pipe is pivoted to one end of the connecting rod; the other end of the connecting rod is pivoted with the piston; the piston is positioned in the piston sleeve; the piston sleeve is a cylinder with one closed end and the other open end and is positioned outside the bent pipe, the bent pipe is provided with a notch, and the open end of the piston sleeve is connected with the bent pipe and completely covers the notch of the bent pipe;
the sealer main body, the valve plate, the connecting rod, the piston and the piston sleeve jointly form a mechanism capable of converting the rotary motion of the valve plate into the linear motion of the piston;
one end of the connecting pipe is connected with the closed end of the piston sleeve or a part close to the closed end, and the other end of the connecting pipe is connected with the elbow section between the piston sleeve and the elbow pipe orifice a, so that the piston sleeve and the elbow pipe are always kept in a communicated state when the piston moves; the cross-sectional area of the piston sleeve is more than 30 times of that of the connecting pipe.
2. The bottom valve of claim 1, wherein the elbow is 1/4 segments of a circular ring pipe; the piston sleeve is a cylinder; the valve plate is a circular plate.
3. The micro-resistance slow-closing water elbow bottom valve according to claim 2, wherein the maximum rotation angle of the valve plate is 60-75 degrees; the length of the piston sleeve is equal to the length of the connecting rod, the thickness of the piston and the first stroke allowance; the length of the connecting rod is equal to the length of a connecting line between the cylinder opening of the piston sleeve and the center of the pipe opening a of the elbow pipe and the second stroke allowance is equal to the diameter of the valve plate; the piston sleeve is vertically connected with the elbow, namely the central axis of the piston sleeve passes through the center of a circle corresponding to the elbow; the included angle between the central axis of the piston sleeve and the pipe orifice a of the elbow is 15-30 degrees.
4. The micro-resistance slow-closing upper elbow bottom valve according to claim 3, wherein the first stroke margin is 50mm, and the second stroke margin is 30 mm.
5. The micro-resistance slow-closing upper elbow bottom valve according to claim 1, wherein the piston and the piston sleeve are in clearance fit, and the fit clearance is 0.1-0.2 mm; the cross sectional area of the piston sleeve is 30-50 times of that of the connecting pipe; the cross-sectional area of the bent pipe is 50-80 times of that of the piston sleeve.
6. The micro-resistance slow-closing water upper bent pipe bottom valve according to claim 1, wherein one side of the valve plate is pivoted to the sealer main body through a valve plate fixing assembly, and the valve plate fixing assembly consists of a fixing frame I, a fixing frame II, a nut, a bolt, a stop pad and a rotating rod;
one end of the rotating rod is in a ring shape, the other end of the rotating rod is in a rectangular cross section, and the fixing frame I, the rotating rod, the fixing frame II, the stop pad and the nut are sleeved on the bolt and arranged from the head end to the tail end of the bolt;
keep 0.5 ~ 1mm clearance between mount I and mount II and the rotary rod, mount I and mount II and bolt fixed connection, simultaneously with sealer main part fixed connection, keep 0.2 ~ 0.5mm clearance between rotary rod and the bolt, rotary rod and valve plate fixed connection, the locking pad is laminated with mount II and nut respectively.
7. The bottom valve of claim 1, wherein the sealing body is a lower flange with a sealing surface, and is fixedly connected to the elbow at the opening a of the elbow.
8. The bottom valve of claim 7, further comprising an upper flange fixedly connected to the elbow at the pipe orifice b of the elbow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897118.7U CN210088017U (en) | 2019-06-14 | 2019-06-14 | Micro-resistance slow-closing upper elbow bottom valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897118.7U CN210088017U (en) | 2019-06-14 | 2019-06-14 | Micro-resistance slow-closing upper elbow bottom valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210088017U true CN210088017U (en) | 2020-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920897118.7U Active CN210088017U (en) | 2019-06-14 | 2019-06-14 | Micro-resistance slow-closing upper elbow bottom valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210088017U (en) |
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2019
- 2019-06-14 CN CN201920897118.7U patent/CN210088017U/en active Active
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Address after: 201800 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Patentee after: SHANGHAI RICHEN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 201800 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Patentee before: SHANGHAI RICHEN Co.,Ltd. |