CN2721912Y - Shut-off device for water jet with low pressure protection - Google Patents
Shut-off device for water jet with low pressure protection Download PDFInfo
- Publication number
- CN2721912Y CN2721912Y CN 200420021963 CN200420021963U CN2721912Y CN 2721912 Y CN2721912 Y CN 2721912Y CN 200420021963 CN200420021963 CN 200420021963 CN 200420021963 U CN200420021963 U CN 200420021963U CN 2721912 Y CN2721912 Y CN 2721912Y
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- China
- Prior art keywords
- spool
- low pressure
- closes
- spring
- plug screw
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Abstract
The utility model discloses a stop gear for closing gun with low pressure protection, comprising a valve base (1). A valve core (4) is provided in the inner hole of the valve base, a spring (6) is provided in the valve core, one end of the spring is provided with a screw plug(10), and a discharge hole is provided in the screw plug. The inner part and the outer part of the valve base are installed with two C-shaped sealing ring (2)and(3), and the middle part of the valve core is provided with a big cylindrical surface(41) which is cooperated with the inner hole of the valve base in a sliding way. The left side of the big cylindrical surface of the valve core is connected with a conical surface (42), the outer side of the screw plug is collocated with an inching switch (13), the tail part of the valve core (4) is provided with a push arm(11) connected with the inching switch (13). The utility model has the advantages of that double sealing structures are provided between the valve core and the valve base, the reliability of gun closing and machine closing is improved, and the power supply of an electric machine can be disconnected when the gun is suddenly closed, the accomplishments of the gun closing and disconnecting the electricity are synchronously carried out, which greatly reduces the frictional consumption and noise generated in the pump, the service life of the parts and accessories of the pump are clearly improved.
Description
Technical field
The utility model relates to a kind of safety valve field of high-pressure water pump.Relate in particular to a kind of low pressure holding that is used for the jetting machine water pump and close the rifle arresting gear.So-called low pressure holding when the safety valve action makes machine be in outage state, still keeps pressure less than 3 MPas from the high pressure water gun stop valve to pumping exactly the water valve.With respect to the pass rifle arresting gear of high pressurize, its advantage is to close after rifle shuts down, in the pump and the pressure that keeps in annex high-pressure water pipe and the high pressure water gun very little, help to improve life-span of the part and accessory of entire pump; This safety valve adopts the low pressure holding mode to keep sensitive switch to be in off state.It mainly is used in the plunger-type pump of high pressure cleaner of washing machine motor vehicle and various building and relevant facility.
Background technique
For prevent because of produce unexpected injury that excess pressure causes in the pump, for frictional loss in the pump that reduces high-pressure water pump, reduce environmental pollution that noise causes and the working life of improving its complete machine, need the structural design of safety valve during high-pressure water pump uses.When it closes rifle suddenly with box lunch, can reduce the pump internal pressure rapidly, disconnect the power supply of motor.
The structural design of existing high-pressure water pump safety valve has more scheme.As disclosed in the Chinese patent specification 01274135.3 " washing machine safety valve ", as shown in Figure 7, it comprises and is shaped on the off-load valve chamber in the pump head, valve seat 6 is installed in the off-load valve chamber, spool 2 is arranged in the valve seat, and spool has the spring 3 that matches, and spring matches with bonnet 4, be shaped on unloading hole 7 and backwater hole 5 in valve seat 6, unloading hole leads to high-pressure water chamber 10.When the washing machine spray gun was opened, high pressure water through the spray gun ejection, can not make high pressure cause damage from the high pressure intake to the water outlet again; But after spray gun cuts out, when pressure surpasses working pressure, spring by compression, the action of off-load spool, high pressure water carries out off-load through unloading hole 7 to off-load backwater hole 5, pressure descends rapidly, has protected valve and pump chamber, avoids the damage of jet pipe recoil water.Yet " the washing machine safety valve " in the above-mentioned patent specification 01274135.3 can not disconnect the power supply of motor when high-pressure water pump closes rifle suddenly, makes machine not be in outage state and finishes and close rifle and power cutoff carries out synchronously; Simultaneously, complete machine still is in running state during owing to the pass rifle, and the current in the pump circulate in pump and cause frictional heating, time just can reach fluidized state slightly for a long time, very easily cause unexpected injury, produce frictional loss and noise in the pump, influence the working life of complete machine and part.
The model utility content
The purpose of this utility model is exactly in order to overcome above-mentioned deficiency of the prior art, and a kind of low pressure holding pass rifle arresting gear that adopts the low pressure holding mode to keep sensitive switch to be in off state, to have good operational reliability is provided.
The purpose of this utility model is by providing the technological scheme that a kind of low pressure holding with following structure closes the rifle arresting gear to realize; it comprises valve seat; in the described valve seat endoporus spool is set; one spring that matches is set in the described spool; one end of described spring is provided with a plug screw, is provided with discharge orifice in plug screw.
Described valve seat inside and outside is provided with two " O " RunddichtringOs, the great circle cylinder that is slidingly fitted with the valve seat endoporus that described spool middle part is provided with, the left side of described spool great circle cylinder connects a conical surface, the outside of described plug screw disposes a sensitive switch, described spool afterbody is provided with a push arm, and described push arm is connected with described sensitive switch.Described valve seat middle part is provided with discharge orifice.
Described " O " RunddichtringO is arranged between the discharge orifice of the conical surface of described spool and described plug screw.Be nested with a pad between the right-hand member of described spring and the described spool.Be nested with a back-up ring between the left end of described spring and the described plug screw.Inside and outside one " O " RunddichtringO that respectively is provided with of described plug screw.
Described sensitive switch comprises a switch capsule lower cover, and described switch capsule lower cover is connected with the outside of described plug screw, and described switch capsule lower cover disposes a switch capsule loam cake.Described sensitive switch and described lower cover Joint.
The utility model spool and valve seat when normal working are in closed state, and the high-pressure water flow that produces in the pump flows out through total one-way valve.After the high-pressure water flow that flows out is cut off by the stop valve of high pressure water gun, the power that the pressure of the high-pressure water flow in the pump acts on spool is when being enclosed within the thrust of the spring on the spool, spool is moved to the left rapidly, when making spool and valve seat break away from closure, the seal failure of spool and " O " RunddichtringO, high-pressure water flow unloads the low-pressure intake that is depressed into pump through valve seat, plug screw and discharge orifice.The push arm of spool drive simultaneously moves to left, and sensitive switch is cut off the electricity supply, and high-pressure water pump quits work.
When pressure drops to a certain degree, spool moves right under the thrust of spring, and form sealing with " O " RunddichtringO once more, at this moment, because the pressure in the pressure ratio high-pressure outlet in the pump is low, so total one-way valve is closed, residual pressure acts on the power and the spring force maintenance balance that acts on the spool of spool in the high-pressure outlet, spool stops to move to right, because also deficiency is so that sensitive switch resets in the displacement of the push arm that displacement amount drove of spool, high-pressure water pump still is in halted state.
When opening the stop valve of high pressure water gun once more, the pressure in the high-pressure outlet is reduced to zero rapidly, and spool resets rapidly under the effect of spring force, again with the valve seat closure.Push arm breaks away from sensitive switch and sensitive switch is resetted rapidly, connects power supply high-pressure water pump is restarted.
Compared with prior art, advantage of the present utility model is: 1. improved and closed the reliability that rifle is shut down.Have dual sealing configuration between spool and the valve seat, only need very low pressure just can realize that low pressure holding closes rifle and shuts down in the high-pressure outlet; 2. can disconnect the power supply of motor when high-pressure water pump closes rifle suddenly, make machine be in outage state, finish pass rifle and power cutoff and carry out synchronously; 3. reduce the frictional loss and the noise that produce in the pump greatly, the life-span of the part and accessory of pump is able to obvious raising.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A cut-away view of Fig. 1;
Fig. 3 is a normal working action schematic representation of the present utility model;
The power that Fig. 4 acts on spool 4 for high-pressure water flow of the present utility model is when being enclosed within the thrust of the spring on the spool, and spool is moved to the left rapidly, and spool drives push arm and moves to left, and cuts off sensitive switch and makes the out-of-work action schematic representation of high-pressure water pump;
Fig. 5 drops to a certain degree for pressure of the present utility model, spool moves right under the thrust of spring, the power that residual pressure acts on spool in the high-pressure outlet with act on spring force on the spool when keeping balance high-pressure water pump be in the action schematic representation of halted state;
Fig. 6 is for of the present utility model when opening the stop valve of high pressure water gun once more, pressure in the high-pressure outlet is reduced to zero rapidly, spool resets rapidly under the effect of spring force, and push arm breaks away from sensitive switch and connects the action schematic representation that power supply restarts high-pressure water pump;
Fig. 7 is a kind of prior art constructions schematic representation;
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Fig. 1 to Fig. 6 shows the mode of execution that the utility model low pressure holding closes the rifle arresting gear.It comprises valve seat 1, and a spool 4 is set in the described valve seat endoporus, and a spring that matches 6 is set in the described spool, and the left end of described spring is provided with a plug screw 10, is nested with a pad 5 between the right-hand member of described spring and the described spool.Be nested with a back-up ring 7 between the left end of described spring and the described plug screw.Inside and outside one " O " RunddichtringO 8,9 that respectively is provided with of described plug screw.
Be provided with discharge orifice 15 in the described valve seat.Valve seat inside and outside is provided with two " O " RunddichtringOs 2,3, and described " O " RunddichtringO 3 is arranged between the conical surface 42 and described discharge orifice 15 of described spool.The great circle cylinder 41 that is slidingly fitted with the valve seat endoporus that described spool middle part is provided with, the left side of described spool great circle cylinder connects a conical surface 42, the outside of described plug screw disposes a sensitive switch 13, described spool afterbody is provided with a push arm 11, and described push arm is connected with described sensitive switch.Described sensitive switch comprises a switch capsule lower cover 12, and described switch capsule lower cover is connected with the outside of described plug screw, and described switch capsule lower cover disposes a switch capsule loam cake 14.Described sensitive switch and described lower cover Joint.
The utility model working procedure is as follows:
Figure 3 shows that in normal working: spool 4 is in closed state with valve seat 1, and the high-pressure water flow that produces in the pump flows out through total one-way valve 16.
After the high-pressure water flow that flows out is cut off by the stop valve 17 of high pressure water gun, the pressure of the high-pressure water flow in the pump further raises, the power that acts on spool 4 until high-pressure water flow is when being enclosed within the thrust of the spring 6 on the spool, spool 4 is moved to the left rapidly, when making spool and valve seat break away from closure, spool also lost efficacy with the sealing of " O " RunddichtringO 3, and high-pressure water flow unloads the low-pressure intake 25 that is depressed into pump through valve seat 1, plug screw 10 and discharge orifice 15.Spool 4 drive push arms 11 move to left simultaneously, and the contact 131 of sensitive switch 13 is by acting surface 111 pressings of push arm 11, thereby cut-out sensitive switch 13 quits work high-pressure water pump, as shown in Figure 4.
When pressure drops to a certain degree, spool 4 moves right under the thrust of spring, and form sealing with " O " RunddichtringO 3 once more, this moment is because the pressure in the pressure ratio high-pressure outlet 18 in the pump is low, total one-way valve 16 is closed, residual pressure acts on the power and the spring force maintenance balance (supposing that in theory various frictional force are zero) that acts on the spool of spool 4 in the high-pressure outlet 18, spool 4 stops to move to right, since the displacement of the push arm that displacement amount drove 11 of spool also deficiency so that sensitive switch 13 reset, high-pressure water pump still is in halted state, as shown in Figure 5.
When opening the stop valve 17 of high pressure water gun once more, the pressure in the high-pressure outlet 18 is reduced to zero rapidly, and spool resets rapidly under the effect of spring force, again with the valve seat closure.Push arm 11 breaks away from microswitch push-button contact 131 under the drive of spool, sensitive switch 13 resets rapidly, connects the high-pressure water pump power supply high-pressure water pump is restarted, as shown in Figure 6.
The structural feature of this device is to have dual sealing configuration between spool 4 and the valve seat 1, i.e. first road sealing is that the conical surface of spool 4 and the discharge orifice 15 of valve seat produce sealing between straight under the effect of spring force; The sealing of second road is that the great circle cylinder 42 of spool forms sealing by " O " RunddichtringO 3 and valve seat 1.In normal operation, the initial tension of spring that needs only setting is greater than hydraulic actions are in the power of the first road sealing surface in the high-pressure outlet 18, and spool 4 can not move.In case but the interior hydraulic action of high-pressure outlet is when the power of the first road sealing surface is a bit larger tham initial tension of spring (supposing that various frictional force are zero), in the time of the first road unseal, the sealing of second road is owing to the increasing suddenly (increasing of compression area just) of sealing area, and spool is pushed into the power supply and the release of limit position cutoff high water pump rapidly.Because the second road sealing area is very big,, only needs very low pressure just can form balance in the high-pressure outlet, thereby reach the requirement of low pressure holding with spring force so move to right when reaching the sealing of second road again with valve seat at the release back valve core.
Claims (8)
1. a low pressure holding closes the rifle arresting gear; comprise valve seat; in the described valve seat endoporus spool is set; one spring that matches is set in the described spool; one end of described spring is provided with a plug screw; in plug screw, be provided with discharge orifice; it is characterized in that: in the described valve seat (1); two " O " RunddichtringOs (2) are set outward; (3); described spool (4) middle part is provided with a great circle cylinder (41) that is slidingly fitted with valve seat (1) endoporus; the left side of described spool great circle cylinder connects a conical surface (42); the outside of described plug screw (10) disposes a sensitive switch (13); described spool (4) afterbody is provided with a push arm (11), and described push arm (11) is connected with described sensitive switch (13).
2. low pressure holding according to claim 1 closes the rifle arresting gear, it is characterized in that: described plug screw middle part is provided with discharge orifice (15).
3. low pressure holding according to claim 1 closes the rifle arresting gear, and it is characterized in that: described " O " RunddichtringO (3) is arranged between the conical surface (42) and described discharge orifice (15) of described spool.
4. low pressure holding according to claim 1 closes the rifle arresting gear, it is characterized in that: be nested with a pad (5) between the right-hand member of described spring (6) and the described spool (4).
5. low pressure holding according to claim 5 closes the rifle arresting gear, it is characterized in that: be nested with a back-up ring (7) between the left end of described spring (6) and the described plug screw (10).
6. low pressure holding according to claim 1 closes the rifle arresting gear, it is characterized in that: inside and outside one " O " RunddichtringO (8), (9) of respectively being provided with of described plug screw (10).
7. low pressure holding according to claim 1 closes the rifle arresting gear; it is characterized in that: described sensitive switch (13) comprises a switch capsule lower cover (12); described switch capsule lower cover (12) is connected with the outside of described plug screw (10), described switch capsule lower cover (12) configuration one switch capsule loam cake (14).
8. low pressure holding according to claim 7 closes the rifle arresting gear, it is characterized in that: described sensitive switch (13) and described lower cover (12) Joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021963 CN2721912Y (en) | 2004-04-16 | 2004-04-16 | Shut-off device for water jet with low pressure protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021963 CN2721912Y (en) | 2004-04-16 | 2004-04-16 | Shut-off device for water jet with low pressure protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2721912Y true CN2721912Y (en) | 2005-08-31 |
Family
ID=35012284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420021963 Expired - Fee Related CN2721912Y (en) | 2004-04-16 | 2004-04-16 | Shut-off device for water jet with low pressure protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2721912Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050633A (en) * | 2016-08-05 | 2016-10-26 | 江苏三龙电气有限公司 | Switch control system for high-pressure cleaning machine |
| CN106552788A (en) * | 2016-11-17 | 2017-04-05 | 宁波可利尔电器科技有限公司 | A kind of jetting machine |
| CN107218208A (en) * | 2016-03-21 | 2017-09-29 | 香港尚德-富佑捷有限公司 | Jetting machine induction machine starts pressure relief device and the pump housing including the device |
| WO2023005861A1 (en) * | 2021-07-26 | 2023-02-02 | 浙江飞越机电有限公司 | Pressure relief valve state detection structure for electric hydraulic pipe-machining tool |
-
2004
- 2004-04-16 CN CN 200420021963 patent/CN2721912Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218208A (en) * | 2016-03-21 | 2017-09-29 | 香港尚德-富佑捷有限公司 | Jetting machine induction machine starts pressure relief device and the pump housing including the device |
| CN106050633A (en) * | 2016-08-05 | 2016-10-26 | 江苏三龙电气有限公司 | Switch control system for high-pressure cleaning machine |
| CN106552788A (en) * | 2016-11-17 | 2017-04-05 | 宁波可利尔电器科技有限公司 | A kind of jetting machine |
| CN106552788B (en) * | 2016-11-17 | 2019-03-01 | 宁波可利尔电器科技有限公司 | A kind of jetting machine |
| WO2023005861A1 (en) * | 2021-07-26 | 2023-02-02 | 浙江飞越机电有限公司 | Pressure relief valve state detection structure for electric hydraulic pipe-machining tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050831 Termination date: 20100416 |