CN214579109U - Low-pressure-maintaining unloading valve for high-pressure cleaning machine - Google Patents
Low-pressure-maintaining unloading valve for high-pressure cleaning machine Download PDFInfo
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- CN214579109U CN214579109U CN202021987579.2U CN202021987579U CN214579109U CN 214579109 U CN214579109 U CN 214579109U CN 202021987579 U CN202021987579 U CN 202021987579U CN 214579109 U CN214579109 U CN 214579109U
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Abstract
The utility model relates to a high pressure cleaner field, concretely relates to low pressure maintaining unloading valve for high pressure cleaner. The pump head is internally provided with a water inlet cavity, a water outlet cavity and a pump cavity; still opened the pressure release passageway between intake antrum and the pump chamber, pressure release passageway department is provided with low pressurize off-load valve, and low pressurize off-load valve includes valve casing, off-load valve case, disk seat and pressure release spring, and the off-load valve case is worn to establish in the valve casing, and the disk seat sets up in off-load valve case lower extreme, and the shaping has step portion in the middle part of the off-load valve case, and the outside of step portion is laminated with the inner wall of valve casing, and on the off-load valve case was located to the pressure release spring cover, the lower extreme in step portion was supported to the upper end of pressure release spring, the lower extreme support in the upper end of disk seat, the upper end of off-load valve case extended to outside the pump head, and the lower extreme jam in pressure release passageway of off-load valve case. The pressure of the load in the pump is released for the second time, the water outlet cavity is in a low pressure-maintaining state, so that the load in the pump is very small, the motor is started under ultra-low load, and the gun closing motor has the functions of quick stopping and high gun opening starting sensitivity.
Description
Technical Field
The utility model relates to a high pressure cleaner field, concretely relates to low pressure maintaining unloading valve for high pressure cleaner.
Background
High pressure cleaning machine that uses in the existing market has generally all adopted high pressurize unloading valve structure, also has begun to be equipped with automatic switch structure on some high pressure cleaning machines, can realize closing the rifle shutdown function, wherein mostly adopted micro-gap switch to realize, but the gun shutdown structure of high pressure cleaning machine pump among the prior art has certain design defect, easily causes the motor to start the difficulty, influences high pressure cleaning machine, squirt, high-pressure tube life-span.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to exist not enough among the above-mentioned prior art, provide a simple structure, with load secondary pressure release in the pump, go out the water cavity and become low pressure retaining state, it is very little to make the load in the pump, the ultralow load of motor starts, it stops soon to have a rifle motor of closing, it starts the high function of sensitivity to open the rifle, unloading valve action time is short simultaneously, thereby the pump head has been improved, including a motor, a micro-gap switch, the squirt, the life-span that the high-pressure tube used, the power consumption also reduces simultaneously, a low pressure retaining unloading valve for high pressure cleaner.
The purpose of the utility model is realized like this:
a low pressure-holding unloading valve for a high-pressure cleaning machine is used on a pump head, a water inlet, a water outlet, the low pressure-holding unloading valve and a check valve are arranged on the pump head, and a water inlet cavity, a water outlet cavity and a pump cavity are arranged in the pump head;
still open the pressure release passageway between intake antrum and the pump chamber, pressure release passageway department is provided with low pressurize off-load valve, low pressurize off-load valve includes valve casing, off-load valve case, disk seat and pressure release spring, and the off-load valve case is worn to establish in the valve casing, and the disk seat sets up in off-load valve case lower extreme, and the middle part shaping of off-load valve case has step portion, the outside of step portion and the inner wall laminating of valve casing, pressure release spring housing are located on the off-load valve case, pressure release spring's upper end support in the lower extreme of step portion, the lower extreme support in the upper end of disk seat, outside the upper end of off-load valve case extended to the pump head, the lower extreme jam in pressure release passageway of off-load valve case.
The utility model discloses a further, the outside of valve casing has seted up the rivers groove, has seted up the backward flow hole on the rivers groove, the backward flow hole communicates in the play water cavity, has seted up the backward flow passageway that corresponds with the backward flow hole on the pump head, backward flow passageway one end is linked together with the delivery port, the water in the delivery port can flow into out the water cavity through backward flow passageway, backward flow hole; the upper side and the lower side of the water flow groove are both provided with sealing rings; the valve casing is internally provided with a valve casing sealing ring.
The utility model discloses it is further, the upper end of off-load valve case is provided with retaining ring and case sealing washer, there is second grade off-load inclined plane step portion's top, and terminal surface sets up water drainage tank under the off-load valve case
The utility model discloses it is further, on the off-load valve case was worn to the off-load valve spring, the below of off-load valve case step portion was withstood to the upper end, and the off-load valve disk seat is withstood to the lower extreme.
The utility model discloses it is further, the lower extreme of off-load valve case is provided with valve screw, and valve screw passes the disk seat is fixed in the lower extreme of off-load valve case, and the spiral shell head of valve screw lower extreme supports the disk seat hole from the below.
The utility model discloses it is further, the outside of disk seat is provided with the disk seat sealing washer.
The utility model discloses it is further, water outlet department is provided with the check valve, and the check valve includes the check valve case and sets up in the non return spring of check valve case rear end.
The utility model discloses it is further, micro-gap switch is installed to the upper end of off-load valve case.
Compared with the prior art, the utility model outstanding and profitable technological effect is:
the utility model relates to a mainly used will follow the low pressure water pressure boost and be the water under high pressure, with the water under high pressure blowout with the low pressure off-load valve of keeping voltage on the high pressure cleaner pump of wasing article. The main structure has included the pump head, has water inlet and delivery port on the pump head, and pump head inside still divide into pump chamber and intake antrum, separates with low holding pressure unloading valve between pump chamber and the intake antrum, makes rivers can only get into the pump chamber from the intake antrum, is provided with a plurality of reciprocating motion's plunger in the pump chamber, and the plunger can form a vacuum low-pressure chamber at reciprocating motion's in-process, the pump chamber can follow the intake antrum and inhale water, the piston is the forward motion again, discharges the water in the pump chamber fast, forms the high pressure water through the spray gun throttle, because these water can not rethread check valve enter into the intake antrum, can only follow the delivery port blowout, spun water is the water under high pressure.
In order to prevent that the water pressure in the pump chamber is too big, the utility model discloses pressure release passageway has still been seted up between pump chamber and intake antrum, pressure release passageway department is provided with low pressurize off-load valve, plugs up pressure release passageway through low pressurize off-load valve. When the valve outside the water outlet of the pump head is closed, water in the water outlet cannot be discharged, at the moment, the water in the water outlet enters the water outlet cavity through the backflow channel and the backflow hole, the water pressure in the water outlet cavity and the pump cavity is gradually increased, and the action force generated by the cross-sectional area difference of the valve core of the unloading valve overcomes the elastic force of the spring of the unloading valve, so that the valve core of the unloading valve moves downwards; the step part is separated from the valve shell, so that the water outlet cavity is communicated with the pump cavity area, high-pressure water in the water outlet cavity flows into the pump cavity area, secondary pressure relief is carried out, and when acting force of water pressure in the water outlet cavity on the valve core of the unloading valve is balanced with spring force of the unloading valve, the function of low pressure maintaining is achieved, no pressure exists in the pump cavity, and the pump head load is small due to the fact that the pressure in the water outlet cavity is small. When the gun is started next time, the pressure in the water outlet cavity is released quickly, the starting load of the motor is small, and the motor is easy to start. When the valve outside the water outlet of the pump head is opened, water at the water outlet and in the water outlet cavity flows out firstly, the pressure in the water outlet cavity is reduced, the valve core of the unloading valve is pushed upwards by the unloading valve spring, the upper end of the valve core of the unloading valve is propped against the micro switch, and the motor is turned on again to work.
Drawings
Fig. 1 is one of the schematic structural diagrams of the present invention.
Fig. 2 is a schematic view of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a cross-sectional view at a-a in fig. 3.
Fig. 5 is a second schematic structural diagram of the present invention.
Fig. 6 is a front view of the present invention.
Fig. 7 is a cross-sectional view at B-B in fig. 6.
Fig. 8 is a schematic structural diagram of a first embodiment of the low-pressure holding unloading valve of the present invention.
Fig. 9 is a front view of the low pressure maintaining unloading valve of the present invention.
Fig. 10 is a cross-sectional view at C-C in fig. 9.
Fig. 11 is an exploded view of a first embodiment of the low pressure maintaining unloading valve of the present invention.
Fig. 12 is a sectional view of a second embodiment of the low pressure maintaining unloading valve of the present invention.
Fig. 13 is an exploded view of a second embodiment of the low pressure maintaining unloading valve of the present invention.
The reference numerals in the figures denote the meanings:
1-pump head; 2-a water inlet; 3-water outlet; 4-a check valve; 5-a plunger; 6-a pressure relief channel;
7-low pressure holding relief valve; 8-valve casing; 9-unloading valve core; 10-a valve seat; 11-a step portion;
12-a valve housing sealing ring; 13-an unloader valve spring; 14-a spool seal ring; 15-a check spring; 16-a retainer ring; 17-a water flow trough; 18-a reflow hole; 19-a return channel; 20-sealing ring; 21-a microswitch; 22-secondary unloading inclined plane; 23-valve screw; 24-valve seat sealing ring.
Detailed Description
The invention will be further described with reference to specific embodiments below:
a low pressure-maintaining unloading valve 7 for a high-pressure cleaning machine comprises a pump head 1, wherein a water inlet 2, a water outlet 3, the low pressure-maintaining unloading valve 7 and a check valve 4 are arranged on the pump head 1, and a water inlet cavity, a water outlet cavity and a pump cavity are arranged in the pump head 1;
still open pressure release channel 6 between intake antrum and the pump chamber, pressure release channel 6 department is provided with low pressurize unloading valve 7, low pressurize unloading valve 7 includes valve casing 8, unloading valve case 9, disk seat 10 and unloading valve spring, and unloading valve case 9 wears to establish in valve casing 8, and disk seat 10 sets up in unloading valve case 9 lower extreme, and the middle part shaping of unloading valve case 9 has step portion 11, the outside of step portion 11 and the inner wall laminating of valve casing 8, unloading valve spring housing locate on unloading valve case 9, the upper end of unloading valve spring support in the lower extreme of step portion 11, the lower extreme support in the upper end of disk seat 10, the upper end of unloading valve case 9 extends to outside the pump head 1, and the lower extreme jam in pressure release channel 6 of unloading valve case 9.
The utility model relates to a low pressure maintaining unloading valve 7 for on high pressure cleaner, the primary structure has included pump head 1, there are water inlet 2 and delivery port 3 on the pump head 1, 1 inside intake antrums that still divide into of pump head, pump chamber and play water cavity, be provided with a plurality of reciprocating motion's plunger 5 in the pump chamber, the motor drives plunger 5 reciprocating motion, can form a negative pressure at reciprocating motion's in-process, the check valve that intakes is opened to the check valve, water inhales from water inlet 2, plunger 5 is the forward motion again, the individual valve of play water is opened, water is through the pump chamber of low pressure maintaining unloading valve 7, check valve 4, discharge from delivery port 3 again, at last through the high-pressure pipe, the throttle of high-pressure nozzle produces the high-pressure water jet.
When the valve outside the water outlet 3 of the pump head 1 is closed, water in the water outlet 3 cannot be discharged, at the moment, the water in the water outlet 3 enters the water outlet cavity and the pump cavity through the backflow channel 19 and the backflow hole 18, the water pressure in the water outlet cavity and the pump cavity is gradually increased, the acting force generated by the cross-sectional area difference of the valve core 9 of the unloading valve can overcome the elastic force of a spring of the unloading valve, so that the valve core 9 of the unloading valve moves downwards, the valve screw 23 is firstly separated from the valve seat 10 in the downward moving process of the valve core 9 of the unloading valve, so that the pressure relief channel 6 is opened, high-pressure water in the pump cavity flows into the water inlet cavity, meanwhile, the check valve 4 is closed, the pump cavity is isolated from the water outlet cavity, the upper end of the valve core 9 of the unloading valve is separated from the microswitch 21, so that the motor is closed, the function of primary pressure relief of the pump cavity is achieved, secondly, the valve core 9 of the unloading valve can continuously move downwards, so that the lower end surface of the valve core 9 of the unloading valve is supported against the upper end surface of the valve seat 10, meanwhile, the secondary unloading inclined plane 22 on the step part 11 is separated from the valve casing sealing ring 12 in the valve casing 8, so that the water outlet cavity is communicated with the pump cavity, and high-pressure water in the water outlet cavity flows into the pump cavity to realize secondary pressure relief; when the force of the water pressure in the secondary pressure relief water outlet cavity acting on the valve core 9 of the unloading valve is smaller than the elastic force of the pressure relief spring, the pressure relief spring resets upwards to drive the valve core 9 of the unloading valve to move upwards, so that the step surface is attached to the valve shell sealing ring 12, at the moment, the force of the water pressure in the water outlet cavity acting on the valve core 9 of the unloading valve is equal to the elastic force of the pressure relief spring, and the valve core 9 of the unloading valve keeps the static unloading valve to complete the low pressure maintaining state.
When the pressure is released, the water at the water outlet 3 and in the water outlet cavity flows out firstly, the pressure in the water outlet cavity is reduced, and the unloading valve core 9 is pushed upwards by the unloading valve spring until the lower end of the valve screw 23 props against the hole 10 of the valve seat. The upper end of the valve core 9 of the unloading valve is propped against the microswitch 21, and the motor is turned on again to work.
During operation, when the pump normally works, the check valve 4 is opened, water enters the water outlet 3 from the pump cavity of the pump head 1 through the check valve 4 and is sprayed out through the high-pressure pipe and the spray gun. When the spray gun is closed, the pressure of the water outlet 3 is increased, the valve core 9 of the unloading valve moves downwards, the lower end of the valve screw 23 is separated from the hole of the valve seat 10, the pump cavity is communicated with the water inlet cavity, the pressure in the inner cavity of the pump head 1 is rapidly reduced, the check valve 4 is closed to separate the pump cavity from the water outlet cavity, the valve core 9 of the unloading valve continues to move downwards due to the pressure difference between the water outlet cavity and the pump cavity, the lower end surface of the valve core 9 of the unloading valve is propped against the upper end surface of the valve seat 10, the secondary unloading inclined surface 22 on the step part 11 is separated from the valve shell sealing ring 12 in the valve shell 8, so that the water outlet cavity is communicated with the pump cavity, high-pressure water in the water outlet cavity flows into the pump cavity to complete secondary pressure relief, the top end of the valve core 9 of the unloading valve is separated from the micro switch 21, the working power supply of the motor is cut off, and when the force of the water pressure secondarily released to the valve core 9 of the unloading valve is less than the elastic force of the pressure relief spring, the pressure relief spring resets upwards to drive the valve core 9 of the unloading valve to move upwards, so that the step surface is attached to the sealing ring 12 of the valve shell, at the moment, the force of the water pressure in the water outlet cavity acting on the valve core 9 of the unloading valve is equal to the elastic force of the pressure relief spring, and the valve core 9 of the unloading valve keeps static and maintains the valve core 9 of the unloading valve at an unloading position. The microswitch 21 is still in the off state at this time, and the water outlet 3 maintains the low pressure-holding pressure. When the spray gun is opened again, the pressure of the water outlet 3 is released, the valve core 9 of the unloading valve is reset under the action of the pressure relief spring, and meanwhile, the lower end of the valve screw 23 props against the hole 10 of the valve seat. The upper end of the valve core 9 of the unloading valve is propped against the microswitch 21, and the motor is turned on again to work.
The utility model has the advantages that a water flow groove 17 is arranged on the outer side of the valve casing 8, a backflow hole 18 is arranged on the water flow groove 17, the backflow hole 18 is communicated with the water outlet cavity, a backflow channel 19 corresponding to the backflow hole 18 is arranged on the pump head 1, one end of the backflow channel 19 is communicated with the water outlet 3, and water in the water outlet 3 can flow into the water outlet cavity through the backflow channel 19 and the backflow hole 18; the upper side and the lower side of the water flow groove 17 are both provided with a sealing ring 20; the valve housing 8 is provided with a valve housing sealing ring 12 inside.
The utility model discloses an optimal scheme does, the upper end of off-load valve case 9 is provided with retaining ring 16 and case sealing washer 14, there is second grade off-load inclined plane 22 step portion 11's top. The lower end surface of the valve core 9 of the unloading valve is provided with a drainage groove.
The utility model discloses an optimal scheme does, on unloading valve case 9 was worn to unloading valve spring 13, the upper end withstood the below of 9 step portions 11 of unloading valve case, and unloading valve disk seat 10 was withstood to the lower extreme.
The utility model discloses an optimal scheme does, the lower extreme of off-load valve case 9 is provided with valve screw 23, and valve screw 23 passes disk seat 10 is fixed in the lower extreme of off-load valve case 9, and the spiral shell head of valve screw 23 lower extreme supports disk seat 10 hole from the below.
The utility model discloses a preferred scheme does, the outside of disk seat 10 is provided with valve seat sealing washer 24.
The utility model discloses an optimal scheme does, 3 departments of delivery port are provided with check valve 4, and check valve 4 includes the check valve case and sets up in the check spring 15 of check valve case rear end.
The valve screw 23 includes two solutions, one is without a sealing ring, and the other is provided with a sealing ring, and the valve screw 23 without a sealing ring is matched with the inclined plane on the valve seat 10 through the inclined plane at the tail end thereof, so as to block the pressure relief channel 6, as shown in fig. 9-11 in detail. In the other type, a groove is formed in the tail part of the valve screw 23, a sealing ring is arranged in the groove, and the sealing ring is attached to the valve seat 10, so that the sealing is tighter, the sealing effect is better, and liquid leakage is not easy to occur, which is shown in fig. 12-13.
The utility model discloses an optimal scheme does, micro-gap switch 21 is installed to the upper end of off-load valve case 9.
The beneficial effects of the utility model include: the pump load is decompressed for the second time, the water outlet cavity is in a low pressure-holding state, the pump load is very small, the motor is started in an ultra-low load mode, the functions of stopping the gun closing motor quickly and starting the gun with high sensitivity are achieved, meanwhile, the action time of the unloading valve is short, the service life of the pump head 1, the motor, the microswitch 21, the water gun and the high-voltage tube is prolonged, and meanwhile, the power consumption is also reduced.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. A low pressure holding unloading valve for a high pressure cleaning machine is characterized in that: the device comprises a pump head, wherein a water inlet, a water outlet, a low pressure relief valve and a check valve are arranged on the pump head, and a water inlet area, a water outlet cavity and a pump cavity are arranged in the pump head;
still opened the pressure release passageway between intake zone and the pump chamber, pressure release passageway department is provided with low pressurize unloading valve, low pressurize unloading valve includes valve casing, unloading valve case, disk seat and unloading valve spring, and the unloading valve case is worn to establish in the valve casing, and the disk seat sets up in unloading valve case lower extreme, and the middle part shaping of unloading valve case has step portion, the outside of step portion and the inner wall laminating of valve casing, pressure release spring cover locate on the unloading valve case, pressure release spring's upper end support in the lower extreme of step portion, the lower extreme support in the upper end of disk seat, the upper end of unloading valve case extends to outside the pump head, and the lower extreme of unloading valve case blocks up in pressure release passageway.
2. A low pressure relief valve for a high pressure cleaner according to claim 1 wherein: a water flow groove is formed in the outer side of the valve shell, a backflow hole is formed in the water flow groove and is communicated with the water outlet cavity, a backflow channel corresponding to the backflow hole is formed in the pump head, one end of the backflow channel is communicated with the water outlet, and water in the water outlet can flow into the water outlet cavity through the backflow channel and the backflow hole; the upper side and the lower side of the water flow groove are both provided with sealing rings; the valve casing is internally provided with a valve casing sealing ring.
3. A low pressure relief valve for a high pressure cleaner according to claim 1 wherein: the upper end of the valve core of the unloading valve is provided with a check ring and a valve core sealing ring, a secondary unloading inclined plane is arranged above the step part, and the lower end face of the valve core of the unloading valve is provided with a drainage groove.
4. A low pressure relief valve for a high pressure cleaner according to claim 2 wherein: the unloading valve spring penetrates through the valve core of the unloading valve, the upper end of the unloading valve spring props against the lower part of the step part of the valve core of the unloading valve, and the lower end of the unloading valve spring props against the valve seat of the unloading valve.
5. A low pressure relief valve for a high pressure cleaner according to claim 3 wherein: the lower end of the valve core of the unloading valve is provided with a valve screw, the valve screw penetrates through the valve seat and is fixed at the lower end of the valve core of the unloading valve, and a screw head at the lower end of the valve screw props against a valve seat hole from the lower part.
6. A low pressure holding relief valve for a high pressure washer according to claim 5, wherein: and a valve seat sealing ring is arranged on the outer side of the valve seat.
7. A low pressure relief valve for a high pressure cleaner according to claim 1 wherein: the water outlet is provided with a check valve which comprises a check valve core and a check spring arranged at the rear end of the check valve core.
8. A low pressure relief valve for a high pressure washer according to any one of claims 1-7, wherein: and the upper end of the valve core of the unloading valve is provided with a microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021987579.2U CN214579109U (en) | 2020-09-12 | 2020-09-12 | Low-pressure-maintaining unloading valve for high-pressure cleaning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021987579.2U CN214579109U (en) | 2020-09-12 | 2020-09-12 | Low-pressure-maintaining unloading valve for high-pressure cleaning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214579109U true CN214579109U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021987579.2U Active CN214579109U (en) | 2020-09-12 | 2020-09-12 | Low-pressure-maintaining unloading valve for high-pressure cleaning machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214579109U (en) |
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2020
- 2020-09-12 CN CN202021987579.2U patent/CN214579109U/en active Active
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