CN115301434A - Electromagnetic valve control type pulse jet device and method - Google Patents
Electromagnetic valve control type pulse jet device and method Download PDFInfo
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- CN115301434A CN115301434A CN202210976386.4A CN202210976386A CN115301434A CN 115301434 A CN115301434 A CN 115301434A CN 202210976386 A CN202210976386 A CN 202210976386A CN 115301434 A CN115301434 A CN 115301434A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
- B05B12/06—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for effecting pulsating flow
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Abstract
The invention provides an electromagnetic valve control type pulse jet device and method, relates to the field of pulse jet devices, and aims to solve the problems that the existing cutoff type pulse jet is serious in energy waste, cannot generate abrasive jet, is large in equipment and poor in frequency controllability.
Description
Technical Field
The invention relates to the field of pulse jet devices, in particular to a solenoid valve control type pulse jet device and a method.
Background
The working pressure of the high-pressure water jet is generally higher than 35Mpa, the rock breaking of the high-pressure water jet has the advantages of cleanness, environmental protection, high efficiency, no dust and the like, most of the high-pressure water jet is applied in the fields of cleaning and rust removal at present, and the application range of the technology is gradually closed to the fields of mining, oil drilling, roadway excavation, hard rock breaking and the like.
The pulse jet can be classified into an extrusion type, a self-excitation type, an ultrasonic excitation type, a cutoff type, and the like according to the generation manner. The extrusion type pulse jet has the defects of incapability of forming high-frequency jet, high requirement on the performance of an extrusion cavity, large device and the like, so that the engineering application of the extrusion type pulse jet is limited. The cut-off type pulse jet flow is characterized in that a high-pressure continuous jet flow with the pressure higher than 35MPa is formed by means of a water pump, then a hole disc is driven to rotate through a motor, the continuous jet flow is cut off into pulse jet flows, and parameters such as the rotating speed of the hole disc and the hole distance can be adjusted to change parameters of the cut-off type pulse jet flow. Compared with pulse jet flow in other forms, the cut-off type pulse jet flow can generate pulses in the true sense, and has the advantages of simple device, easiness in adjustment, good pulse effect and the like.
The Chinese invention patent (publication number: CN 109530110A) discloses a spiral distributed radial multi-hole block type pulse jet flow generator. But the scheme causes the jet flow to directly impact the cut-off device, the impact action of the jet flow can aggravate the aging and the abrasion of the cut-off equipment, the service life of the cut-off type pulse jet flow equipment is greatly influenced, and particularly when the abrasive is added into the equipment, the problem is greatly aggravated; although the abrasion of equipment can be reduced by adopting the mode of forming pulse jet by cutting off continuous water jet by gas at present, the quantity of input gas is inconvenient to accurately control, so that the controllability of the pulse jet frequency is poor, and continuous and accurate adjustment is difficult to realize.
Disclosure of Invention
The invention aims to provide a solenoid valve control type pulse jet device and a method, aiming at the defects in the prior art, the pneumatic reciprocating mechanism is used for driving a firing pin to reciprocate, so that continuous jet is cut off, the reciprocating frequency of the firing pin is controlled by controlling the action frequency of the solenoid valve, the continuous stepless frequency modulation of the output frequency of jet pulse is realized, and the requirement of the pulse jet on accurate frequency regulation is met.
The invention aims to provide a solenoid valve control type pulse jet device, which adopts the following scheme:
the device comprises a water pipe connected with a pressure water source, a cut-off chamber arranged on the water pipe and an electromagnetic valve connected with the pressure air source, wherein a pneumatic reciprocating mechanism and a striker are arranged in the cut-off chamber, the striker is inserted into the water pipe and is connected with the output end of the pneumatic reciprocating mechanism, the striker blocks or opens an internal channel of the water pipe under the driving of the pneumatic reciprocating mechanism, and the electromagnetic valve is connected with the pneumatic reciprocating mechanism to drive and control the reciprocating action of the pneumatic reciprocating mechanism; the water pipe at the downstream of the firing pin is provided with a vent hole.
Furthermore, the pneumatic reciprocating mechanism comprises a piston cavity and a piston rod, the piston rod is in sliding fit with the piston cavity through the piston, the piston is connected with the rebound part, the piston cavity is connected with the electromagnetic valve through an air pipe, the piston drives the piston rod to reciprocate along the axial direction of the piston cavity under the combined action of air pressure and the rebound part, and the piston rod is connected with the firing pin.
Further, the regional cooperation piston that the piston chamber held the rebound spare forms the drive chamber, and drive chamber intercommunication snuffle valve is with the exhaust drive intracavity gas, and snuffle valve and solenoid valve access controller respectively, and the controller is through the motion state of opening and close adjustment piston of control snuffle valve and solenoid valve.
Furthermore, the axis of the striker penetrates into the water pipe along the radial direction of the water pipe, the striker penetrates through the side wall on one side of the axis of the water pipe and is in sliding fit with the penetrating position, and a groove for matching the end part of the striker is formed in the inner wall on the other side of the axis of the water pipe.
Furthermore, the vent hole extends to the outside of the cut-off chamber through the vent pipe, and a one-way conduction element is arranged at the position of the vent hole so that external air enters the water pipe.
Furthermore, the pressure water source comprises a water pump and a water source, an inlet of the water pump is connected with the water source, and an outlet of the water pump is connected with the water pipe.
Furthermore, one end of the water pipe, which is far away from the pressure water source, is connected with a nozzle, the branch of the nozzle is connected with an abrasive material supply mechanism, and the abrasive material supply mechanism supplies abrasive materials into the nozzle so as to output abrasive material jet flow through the outlet of the nozzle under the action of pulse jet flow.
Further, the abrasive material supply mechanism comprises an abrasive material tank and a sand pipe, wherein the abrasive material tank is connected into the nozzle branch through the sand pipe so as to be sucked into the nozzle under the action of the pulse jet flow and output along with the pulse jet flow.
A second object of the present invention is to provide a method of operating a solenoid valve controlled type pulse jet apparatus as described in the first object, comprising:
the pressure water source supplies water to the water pipe to form continuous water jet, and the pressure air source supplies air to the pneumatic reciprocating mechanism through the electromagnetic valve;
the striker reciprocates under the action of the pneumatic reciprocating mechanism to block or open the internal channel of the water pipe;
the water jet is periodically blocked by the firing pin to form pulse jet, and the vent hole provides gas for the water pipe to ensure that the pulse jet is stably output to the outside of the water pipe.
Further, the frequency of reciprocation of the striker is controlled by adjusting the operating frequency of the solenoid valve, thereby changing the frequency of the pulse jet.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) Aiming at the problems of serious energy waste and poor frequency controllability of the current cutoff type pulse jet flow, the pneumatic reciprocating mechanism drives the firing pin to reciprocate, so that the continuous jet flow is cut off, the reciprocating frequency of the firing pin is controlled by controlling the action frequency of the electromagnetic valve, the continuous stepless frequency modulation of the output frequency of the jet flow pulse is realized, and the requirement of the pulse jet flow on precise frequency regulation is met.
(2) With the device that cuts backward, reduce and the integration, utilize the striker of small volume as cutting the structure, when having solved traditional formula pulse jet device that cuts and generate the pulse jet, the jet beam directly strikes the energy waste that cuts the hole dish and cause, the easy ageing scheduling problem of equipment, and the small size striker and water pipe wall sliding seal avoid the water to follow revealing of cooperation position, set up recess cooperation striker tip on the water pipe wall opposite side simultaneously, improve its and cut the effect, promote the pulse jet effect.
(3) The air vent is arranged in the cut-off chamber, air is sucked in when the firing pin plugs the pipeline, and the jet flow passing through the firing pin is smoothly discharged, so that energy waste caused by negative pressure generated in the high-pressure pipeline is reduced, and the pipeline is prevented from being damaged by cavitation erosion effect.
(4) Abrasive can be doped, and the abrasive input position is configured at the nozzle position, so that the direct contact between the abrasive and the cut-off structure is avoided, the problem that the service life of the traditional cut-off type pulse abrasive jet device is short is solved, and the generation of pulse abrasive jet is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a solenoid valve controlled pulse jet apparatus in embodiment 1 or 2 of the present invention.
Fig. 2 is a schematic structural view of a cutoff chamber and a solenoid valve in embodiment 1 or 2 of the present invention.
Fig. 3 is a schematic structural view of the pneumatic reciprocating mechanism in embodiment 1 or 2 of the present invention.
In the figure, 1, a water tank, 2, a water pump, 3, a switch, 4, an air pump, 5, a water pipe, 6, an air pipe, 7, a controller, 8, an electromagnetic valve, 9, a cutoff chamber, 10, a sand pipe, 11, a grinding material tank, 12, a nozzle, 13, a piston cavity, 14, a rebound piece, 15, a piston rod, 16, a striker, 17, a pneumatic reciprocating mechanism, 18, a driving cavity, 19, an air release valve and 20, a vent hole are formed.
Detailed Description
Example 1
In an exemplary embodiment of the present invention, a solenoid controlled pulse jet apparatus is provided as shown in fig. 1 to 3.
As shown in figure 1, the electromagnetic valve 8 controlled pulse jet device leads continuous water jet to be periodically intercepted in the intercepting chamber 9 through the cooperation of the high-pressure jet generating assembly, the abrasive supplying assembly, the intercepting chamber 9, the air source supplying assembly and the nozzle 12, thereby outputting pulse jet at the position of the nozzle 12, and when the abrasive supplying assembly works, the abrasive is input into the nozzle 12, so that the pulse jet carries the abrasive output to form abrasive jet.
Referring to fig. 1, the pulse jet device controlled by the solenoid valve 8 mainly comprises a water pipe 5, a cutoff chamber 9 and the solenoid valve 8, wherein the water pipe 5 is connected to a pressure water source, namely, a high-pressure jet generating assembly, and obtains high-pressure water jet from the high-pressure jet generating assembly, and continuous pressure water flow is formed in the water pipe 5; the intercepting chamber 9 is arranged on the water pipe 5, can block or open the water flow in the water pipe 5, and intercepts the continuous water jet when the continuous water jet works, the water jet at the downstream of the intercepting position forms pulse jet flow, and the pulse jet flow which is periodically output is formed by periodically and alternately blocking and opening; meanwhile, the electromagnetic valve 8 is used as a control element of the intercepting chamber 9, the intercepting chamber 9 is connected to a pressure air source through a control valve, the intercepting chamber 9 can realize periodical interception of water flow under the driving of the pressure air source, and the control valve can control the intercepting action frequency of the intercepting chamber.
Specifically, the electromagnetic valve 8 controlled type pulse jet device comprises a water pipe 5 connected with a pressure water source, a cut-off chamber 9 arranged on the water pipe 5 and an electromagnetic valve 8 connected with a pressure air source, wherein a pneumatic reciprocating mechanism 17 and a striker 16 are arranged in the cut-off chamber 9, the striker 16 is connected with the output end of the pneumatic reciprocating mechanism 17 and is driven by the pneumatic reciprocating mechanism 17 to realize reciprocating motion, the striker 16 is stretched into the water pipe 5 and can control the communication of water flow in the water pipe 5 through motion, namely, the internal channel of the water pipe 5 is blocked or opened under the driving of the pneumatic reciprocating mechanism 17, when the striker 16 blocks the internal channel of the water pipe 5, continuous water jet in the water pipe 5 can be blocked, so that pulse jet flow is formed at the downstream of the striker 16, the internal channel of the water pipe 5 is opened after the striker 16 is withdrawn from the blocking position, and the continuous water jet flow continues to flow.
The electromagnetic valve 8 is connected to a pneumatic reciprocating mechanism 17 to drive and control the reciprocating action of the pneumatic reciprocating mechanism, so that continuous water jet in the water pipe 5 is formed into pulse jet; the water pipe 5 downstream of the striker 16 is provided with a vent hole 20 for supplying gas to the water pipe 5 downstream of the striker 16 when the striker 16 intercepts the continuous water jet in the water pipe 5, so that the formed pulse jet is smoothly discharged.
Referring to fig. 1, the pressure water source comprises a water pump 2 and a water source, an inlet of the water pump 2 is connected to the water source, and an outlet of the water pump 2 is connected to a water pipe 5; the pressure air source comprises an air pump 4 and an air pipe 6, the air pump 4 is connected into a control valve through the air pipe 6, and the control valve can control whether the pneumatic reciprocating mechanism 17 is driven or not.
It should be particularly noted that the water pump 2 mentioned in this embodiment is a high-pressure pump to meet the pressure requirement of the output water jet, and the configuration parameters of the water pump 2 may be adjusted according to the working scenario requirement of the output water jet to change the working pressure of the water jet. Meanwhile, the water pipe 5 matched with the high-pressure pump is a high-pressure pipeline, can bear the high-pressure water body output by the high-pressure pump, guides the water body to form continuous water jet, and meets the requirement of forming pulse jet under the action of the firing pin 16.
In order to meet the requirement of the abrasive jet, one end of the water pipe 5 far away from the pressure water source is connected with a nozzle 12, and the nozzle 12 is branched and connected with an abrasive supply mechanism which supplies abrasive into the nozzle 12 so as to output the abrasive jet through the outlet of the nozzle 12 under the action of the pulse jet.
The abrasive material supply mechanism comprises an abrasive material tank 11 and a sand pipe 10, wherein the abrasive material tank 11 is connected into a branch of a nozzle 12 through the sand pipe 10 so as to be sucked into the nozzle 12 under the action of the pulse jet and output along with the pulse jet.
With reference to fig. 1 and the above-mentioned overall structure of the solenoid valve 8-controlled pulse jet device, in this embodiment, the water pump 2 is selected from the high-pressure water pump 2, the air pump 4 is selected from the high-pressure air pump 4, and the high-pressure water pump 2 and the cutoff chamber 9 are connected through the water pipe 5. High compression pump 4 is connected through trachea 6 between the room 9 with cutting, and abrasive tank 11 passes through sand pipe 10 and links to each other with nozzle 12, sets up waterproof gasket between nozzle 12 and the sand pipe 10, as the check valve to prevent that the interior water body of nozzle 12 from getting into sand pipe 10.
The pulse jet flow at the nozzle 12 sucks abrasive into the nozzle 12 by using the Bernoulli effect, the abrasive is mixed into the abrasive jet flow, the abrasive jet flow is output through the outlet of the nozzle 12, and a switch 3 is arranged between the high-pressure water pump 2 and the cut-off chamber 9 to control the opening and closing of the jet flow in the water pipe 5.
As shown in fig. 2 and 3, the pneumatic reciprocating mechanism 17 includes a piston chamber 13 and a piston rod 15, the piston rod 15 is slidably engaged with the piston chamber 13 through the piston, the piston is connected to the resilient member 14, the piston chamber 13 is connected to the electromagnetic valve 8 through the air tube 6, the piston drives the piston rod 15 to reciprocate axially along the piston chamber 13 under the combined action of air pressure and the resilient member 14, and the piston rod 15 is connected to the striker 16 to drive the striker 16 to move.
In order to improve the air intake and exhaust efficiency of the pneumatic reciprocating mechanism 17 and improve the corresponding speed of the pneumatic reciprocating mechanism, the area of the piston cavity 13, which accommodates the rebound part 14, is matched with the piston to form a driving cavity 18, the driving cavity 18 is communicated with an air escape valve 19 to exhaust air in the driving cavity 18, the air escape valve 19 and the electromagnetic valve 8 are respectively connected to the controller 7, the controller 7 adjusts the motion state of the piston by controlling the opening and closing of the air escape valve 19 and the electromagnetic valve 8, and the electromagnetic valve 8 and the air escape valve 19 work in a coordinated manner under the control of a program during work.
The controller 7 can be a computer or a single chip microcomputer, for example, a computer is used for adjusting the time interval of opening and closing the electromagnetic valve 8 and the air release valve 19, so that the motion state of the piston is controlled rapidly, the frequency of the pulse jet flow and the length of the jet flow beam can be controlled efficiently, simply and conveniently, the pulse frequency of the jet flow can be changed in a large range, and the stepless frequency modulation of the pulse jet flow frequency can be realized by adjusting the working frequency of the electromagnetic valve 8.
It can be understood that the piston keeps sliding seal with the piston cavity 13, the air escape valve 19 is closed when the electromagnetic valve 8 is opened, the high-pressure air is filled into the driving cavity 18, the driving piston drives the piston rod 15 and the striker 16 to move, the rebound piece 14 is extended to accumulate force, continuous water jet in the water pipe 5 is cut off through the striker 16, and pulse jet is output; when the electromagnetic valve 8 is closed, the air release valve 19 is opened, the rebound piece 14 drives the piston rod 15 and the striker 16 to recover the original position, and the striker 16 opens a channel in the water pipe 5 to enable continuous water jet to continue to pass through the position of the striker 16; the output of the pulse jet is realized by repeating the action.
For the resilient member 14, a spring, a tension spring, a rubber rope, or other elements suitable for a high-frequency resilient working scene can be selected; the striker 16 is of a structure capable of bearing the pressure of the water jet and of effectively blocking the water jet.
In addition, in order to improve the working efficiency of the striker 16, the axis of the striker 16 extends into the water pipe 5 along the radial direction of the water pipe 5, the striker 16 penetrates through the side wall of one side of the axis of the water pipe 5 and is in sliding fit with the penetrating position, and a groove for matching the end part of the striker 16 is arranged on the inner wall of the other side of the axis of the water pipe 5.
Move backward, reduce and the integration the cut-off device, utilize the striker 16 of small volume as cutting off the structure, when having solved traditional cut-off formula pulse jet device and generating pulse jet, the jet beam directly strikes the energy waste that cuts off the hole dish and cause, the easy ageing scheduling problem of equipment, small volume striker 16 and 5 wall sliding seal of water pipe avoid the water to follow the revealing of cooperation position, set up recess cooperation striker 16 tip on 5 wall opposite sides of water pipe simultaneously, improve its and cut off the effect, promote the pulse jet effect.
Meanwhile, the vent hole 20 extends out of the intercepting chamber 9 through the vent pipe 6, and a one-way conduction element is arranged at the position of the vent hole 20 so as to enable external air to enter the water pipe 5. The cutoff chamber 9 is provided with a vent hole 20, air is sucked in when the striker 16 blocks the pipeline, and the jet flow passing through the striker 16 is smoothly discharged, so that energy waste caused by negative pressure generated in the high-pressure pipeline is reduced, and the pipeline is prevented from being damaged by cavitation effect.
Example 2
In another exemplary embodiment of the present invention, as shown in fig. 1 to 3, a method of operating a solenoid valve 8 controlled type pulse jet apparatus is provided.
In combination with the solenoid valve 8 of embodiment 1, the control type pulse jet device includes:
the pressure water source supplies water to the water pipe 5 to form continuous water jet, and the pressure air source supplies air to the pneumatic reciprocating mechanism 17 through the electromagnetic valve 8;
the striker 16 reciprocates under the action of the pneumatic reciprocating mechanism 17 to block or open the internal channel of the water pipe 5; the water jet is periodically blocked by the firing pin 16 to form pulse jet, and the vent hole 20 provides gas for the water pipe 5, so that the pulse jet is stably output to the outside of the water pipe 5;
the frequency of reciprocation of the striker 16 is controlled by adjusting the frequency of operation of the solenoid valve 8, thereby varying the frequency of the pulsed jet.
Specifically, with reference to fig. 1 to fig. 3 and embodiment 1, the working method includes:
when the device is used, the high-pressure air pump 4 and the high-pressure water pump 2 are firstly opened, the high-pressure air pump 4 generates high-pressure air, the high-pressure water pump 2 sucks clear water in the water tank 1, the clear water is pressurized in the water pump 2 to form high-pressure continuous water jet which flows to the nozzle 12 along the high-pressure water pipe 5;
the high-pressure air pump 4 generates high-pressure air with certain pressure, a pneumatic reciprocating mechanism 17, a striker 16, an electromagnetic valve 8 and an air release valve 19 are arranged between a high-pressure air pipe 6 and a high-pressure water pipe 5 of the continuous water jet, the pneumatic reciprocating mechanism 17 can drive the striker 16 to reciprocate under the action of the high-pressure air, and the controller 7 controls the opening and closing of the electromagnetic valve 8 and the air release valve 19;
when the electromagnetic valve 8 is opened, high-pressure air enters the piston cavity 13, the front end of the piston rod 15 is pushed to be connected with the striker 16 to cut off an internal channel of the high-pressure water pipe 5, at the moment, water jet which does not flow through the striker 16 in the high-pressure pipeline is cut off, the water jet which flows through the striker 16 forms pulse jet flow and continues to flow towards the nozzle 12, and air is provided by the vent hole 20 on the side of the cut-off chamber 9, so that the pulse jet flow is smoothly output;
when the electromagnetic valve 8 is closed, the air release valve 19 is opened, the gas in the piston cavity 13 is rapidly discharged, the piston moves back under the action of the pulling force of the rebound piece 14, the striker 16 is withdrawn from the passage of the high-pressure water pipe 5, the water jet in the high-pressure pipeline continuously passes through the position of the striker 16 and flows towards the nozzle 12, and the process is circulated, so that pulse jet is formed.
The frequency change of the pulse jet can be realized by controlling parameters such as the opening and closing interval time of the electromagnetic valve 8. The water tank 1 can be a tank body or a tank body.
The pneumatic reciprocating mechanism 17 drives the striker 16 to reciprocate, so that continuous jet flow is cut off, the reciprocating movement frequency of the striker 16 is controlled by controlling the action frequency of the electromagnetic valve 8, continuous stepless frequency modulation of the output frequency of jet flow pulse is realized, and the requirement of precise frequency regulation of pulse jet flow is met.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A solenoid valve control type pulse jet device is characterized by comprising a water pipe connected with a pressure water source, a cut-off chamber arranged on the water pipe and a solenoid valve connected with a pressure air source, wherein a pneumatic reciprocating mechanism and a striker are arranged in the cut-off chamber, the striker is inserted into the water pipe and connected with the output end of the pneumatic reciprocating mechanism, the striker blocks or opens an internal channel of the water pipe under the drive of the pneumatic reciprocating mechanism, and the solenoid valve is connected with the pneumatic reciprocating mechanism to drive and control the reciprocating action of the solenoid valve; the water pipe at the downstream of the firing pin is provided with a vent hole.
2. The solenoid controlled pulse jet apparatus according to claim 1, wherein the pneumatic reciprocating mechanism comprises a piston chamber and a piston rod, the piston rod is slidably engaged with the piston chamber through a piston, the piston is connected with the resilient member, the piston chamber is connected to the solenoid through an air tube, the piston drives the piston rod to reciprocate along the axial direction of the piston chamber under the combined action of air pressure and the resilient member, and the piston rod is connected with the striker.
3. The solenoid controlled pulse jet device according to claim 2, wherein the area of the piston chamber for accommodating the resilient member is matched with the piston to form a driving chamber, the driving chamber is communicated with the air release valve to discharge air in the driving chamber, the air release valve and the solenoid valve are respectively connected to the controller, and the controller adjusts the motion state of the piston by controlling the opening and closing of the air release valve and the solenoid valve.
4. The solenoid controlled pulse jet device of claim 1, wherein the axis of the striker is radially inserted into the water pipe along the water pipe, the striker penetrates through a side wall of one side of the axis of the water pipe and is slidably engaged with the penetration position, and a groove for engaging with an end of the striker is formed on an inner wall of the other side of the axis of the water pipe.
5. The solenoid valve controlled pulse jet apparatus according to claim 1, wherein the vent hole extends to the outside of the cutoff chamber through a vent pipe, and a one-way conduction element is provided at the position of the vent hole to allow external air to enter the water pipe.
6. The solenoid valve controlled pulse jet apparatus according to claim 1, wherein the pressure water source comprises a water pump and a water source, an inlet of the water pump is connected to the water source, and an outlet of the water pump is connected to the water pipe.
7. The solenoid valve controlled pulse jet apparatus of claim 1, wherein the end of the water pipe remote from the pressure water source is connected to a nozzle, the nozzle branch is connected to an abrasive supply mechanism, and the abrasive supply mechanism supplies abrasive into the nozzle to output an abrasive jet through the nozzle outlet under the action of the pulse jet.
8. The solenoid controlled pulsed waterjet apparatus of claim 7 wherein the abrasive supply means comprises an abrasive tank and a sand pipe, the abrasive tank is connected to the nozzle branch through the sand pipe to be sucked into the nozzle under the action of the pulsed waterjet and output with the pulsed waterjet.
9. A method of operating a solenoid valve controlled pulsed waterjet apparatus according to claims 1-8 comprising:
the pressure water source supplies water to the water pipe to form continuous water jet, and the pressure air source supplies air to the pneumatic reciprocating mechanism through the electromagnetic valve;
the striker reciprocates under the action of a pneumatic reciprocating mechanism to block or open an internal channel of the water pipe;
the water jet is periodically blocked by the firing pin to form pulse jet, and the vent hole provides gas for the water pipe, so that the pulse jet is stably output to the outside of the water pipe.
10. The method of claim 9, wherein the frequency of reciprocation of the striker is controlled by adjusting the frequency of operation of the solenoid valve to vary the frequency of the pulsed jet.
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| CN209180486U (en) * | 2018-10-22 | 2019-07-30 | 河海大学 | It is a kind of be capable of autobalance pressure have pressure flowing full pipeline open-close on-off |
| CN110695859A (en) * | 2019-11-08 | 2020-01-17 | 北京特种机械研究所 | Nozzle with self-mixing flow function |
| CN112616399A (en) * | 2020-11-18 | 2021-04-09 | 内蒙古工业大学 | Degraded grassland water jet root cutting fertilizer applicator |
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