CN206262907U - A kind of jetting machine - Google Patents

Abstract

The utility model discloses a kind of jetting machine, including upper pump casing, plunger displacement pump and minimum living pressure device, plunger displacement pump is connected with the water inlet of upper pump casing, minimum living pressure device is in upper pump casing, it is characterized in that the minimum living pressure device includes pressure retaining valve, piston, push rod and the microswitch that can be triggered by push rod, piston, push rod is slideably positioned in upper pump casing and strainer is provided with between upper pump casing, pressure retaining valve is abutted located at end where the delivery port of upper pump casing and with piston, piston is abutted with push rod, the other end of the microswitch located at upper pump casing, pass rifle from pressure relief and delivery port exhaust structure is additionally provided with upper pump casing.The utility model can in time eliminate residual internal pressure, improve jetting machine safety in utilization, and using jetting machine operating efficiency is improved when being supplied water without hydraulic pressure, mitigate equipment attrition.

Description

A kind of jetting machine

Technical field

The utility model is related to a kind of cleaning equipment, more specifically, it relates to a kind of jetting machine.

Background technology

Using such as needing midway to suspend during jetting machine, need to retain certain pressure in jetting machine upper pump casing, Can Quick water exit during to restart.But lack self-relieving structure or dress after hydraulic giant is closed in existing jetting machine Put, upper pump casing remaining internal pressure is excessive after closing rifle, there is the risk of booster, and internal pressure too high when shooting again causes that trigger is grasped Greatly increased as power, it is more painstaking during shooting, and because introducing external pressure after shooting again, pressure oscillation is larger, can produce bright Aobvious kick, it is on slippery ground to be easily caused hydraulic giant, and water spraying direction deviates, therefore existing jetting machine safety in utilization compared with Difference.The utility model patent of Publication No. CN2688402 disclosed a kind of extra-high-pressure washing machine on March 30th, 2005, including One extra-high-pressure washing machine body with water sucking mouth, is provided with medicament suction on the side wall of the delivery port of described cleaning machine body Mouth.The solution suction means of the utility model is utilized respectively vacuum and the pressure differential of atmospheric pressure, vortex and atmospheric pressure realizes two Plant the larger liquid automatic sucking of value difference and be used in mixed way, both eliminate the work of the human configuration cleaning solution before cleaning Make, being used while allocating for solvent and solute realized again, it is to avoid solution because long-time is placed cause it is rotten, solution is existing The deficiency of cleaning machine only one of which solution suction inlet.But the utility model does not have self-relieving function after hydraulic giant is closed.

Utility model content

Lack self-relieving structure or device after hydraulic giant is closed in existing jetting machine, upper pump casing remaining is interior after closing rifle Pressure is very big, influences the service efficiency and security of jetting machine, and to overcome this defect, the utility model provides a kind of closing Upper pump casing remaining internal pressure, the more preferable jetting machine of security can be automatically eliminated after rifle.

The technical solution of the utility model is：A kind of jetting machine, including upper pump casing, plunger displacement pump and minimum living pressure device, Plunger displacement pump is connected with the water inlet of upper pump casing, and minimum living pressure device is located in upper pump casing, it is characterized in that the minimum living pressure device includes Pressure retaining valve, piston, push rod and the microswitch that can be triggered by push rod, piston, push rod be slideably positioned in upper pump casing and with upper pump Strainer is provided between body, pressure retaining valve is abutted located at end where the delivery port of upper pump casing and with piston, and piston is abutted with push rod, micro- Dynamic switch is additionally provided with pass rifle from pressure relief located at the other end of upper pump casing in upper pump casing.When the hydraulic giant of jetting machine is closed, Delivery port forms high back pressure and promotes pressure retaining valve, piston, push rod to overcome strainer to move successively, is changing jetting machine just Often sealing state during work in upper pump casing, forms a water stream channel, and is connected from pressure relief with rifle is closed so that in upper pump casing The high-pressure hydraulic of residual obtains pressure relief vent, and at the same time, the movement of push rod triggers microswitch again, makes and microswitch signal The plunger-type pump of high pressure cleaner of connection shuts down in time.By above-mentioned action, after this minimum living pressure device can immediately eliminate pass rifle High pressure in upper pump casing, eliminates the potential safety hazard during jetting machine use.

Preferably, being provided with overflow connection chamber in upper pump casing, piston is slideably positioned in overflow connection chamber, piston and overflow Sealing switching construction is provided between connection chamber, described pass rifle is a spout hole from pressure relief, and spout hole connects chamber located at overflow Water inlet that is outer and being communicated to upper pump casing.Piston can be switched between connecting chamber with overflow between sealing and conducting state, hydraulic giant During work, overflow connection chamber is connected with piston seal, and spout hole connects chamber and is not turned on overflow, and the water that water inlet is introduced flows through excessive Stream connection chamber outflow delivery port；When hydraulic giant closes rifle, overflow connects chamber and piston depressurization, and overflow connection chamber is led with spout hole Logical, the water under high pressure remained in overflow connection chamber is discharged by spout hole, realizes closing rifle from pressure release.

Preferably, piston one end is provided with cavity, the other end is installed with piston rod, and piston rod connects chamber end cunning with overflow The dynamic company of wearing, the sealing switching construction is the necking segment on piston rod, and pressure retaining valve adaptation slip is embedded in cavity.Pressurize Valve can make the overall structure of this minimum living pressure device more compact in being embedded in the cavity of piston, set necking segment and cause on piston rod There is diameter and reduce section, hydraulic giant closes rifle, and when high back pressure promotes piston to move, necking segment is movable to the company that chamber is connected with overflow Socket part, piston rod connects chamber end with overflow and becomes non-tight state from previous sealing state, realize overflow connection chamber with it is outer The connection in portion.The fit clearance that piston rod connects chamber connecting portion with overflow is changed by necking segment, the mode that sealing is released is realized It is simple and easy to apply, it is also convenient for the processing of parts.

Preferably, being provided with limited step in upper pump casing, piston stopper, piston gear are provided between limited step and pressure retaining valve The first sealing ring is provided between circle and upper pump casing, piston rod is slided to wear and is connected on piston stopper, piston rod and piston stopper connecting portion It is provided with the second sealing ring.Simultaneously pasted with upper pump casing inner wall sealing by the first sealing ring the cross section of piston stopper filling upper pump casing Close, constitute the end wall that overflow connects chamber, limited step provides axial limiting support, is only capable of piston stopper limited for piston stopper Ground axial movement, it is ensured that relative motion can occur between piston rod and piston stopper so that piston connect chamber with overflow between sealing Switching can smoothly be realized, be realized being tightly connected with piston rod by second sealing ring.

Preferably, the strainer between described piston and upper pump casing includes socket piston tensioning bullet on the piston rod Spring, piston tensioning spring two ends are connected to limited step and piston rod root respectively.Piston tensioning spring ensures jetting machine In normal work, piston rests on origin, keeps the sealing state between connecting chamber with overflow, pass rifle is in from pressure relief Masked state, prevents the working condition of this minimum living pressure device from getting muddled.

Preferably, being additionally provided with delivery port exhaust structure in upper pump casing, delivery port exhaust structure includes steam vent, exhaust Road, steel ball, exhaust duct sealing ring and exhaust duct spring, exhaust duct are located between pressure retaining valve and delivery port and connect steam vent, steel In exhaust duct, steel ball offsets with exhaust duct spring for ball, exhaust duct sealing ring and exhaust duct spring.After plunger pump startup from Water inlet absorbs water, the increase of jetting machine internal pressure, overcomes exhaust duct tension force of spring to push steel ball open, turns on exhaust passage, makes machine Interior residual air can be discharged from steam vent, after follow-up high-pressure work is reached with water, further pushed steel ball and be vented until compressing Road sealing ring, closes exhaust passage, and hereafter water under high pressure just passes to delivery port along water stream channel.

Preferably, being installed with plug on upper pump casing inwall on the inside of microswitch, push rod is slided and runs through plug.Plug can Structural support is provided to push rod, push rod the attitude of determination is kept in upper pump casing and can be slid axially.

Preferably, the nearly piston end of push rod is provided with the push rod termination of enlarged-diameter, between described push rod and upper pump casing Strainer includes the push rod tensioning spring being socketed on push rod, and push rod tensioning spring two ends are connected to push rod termination and block up respectively On head.Push rod termination and plug provide support zone for push rod tensioning spring, and push rod tensioning spring ensures jetting machine just Often push rod rests on origin during work, keeps the disengaged position with microswitch, and the plunger displacement pump being connected with microswitch signal is protected Continuous running is held, jetting machine is in normal operating conditions.

Preferably, pressure retaining valve includes valve body and valve element, valve element adaptedly slides and is embedded in valve body, valve body and valve core chamber It is provided with spill cavity and pressurize spring, what valve element was provided with that control spill cavity connects with upper pump casing is slidingly sealed switching construction.Hydraulic giant High back pressure promotes valve element to overcome pressurize tension force of spring to move when closing rifle, and the sealing state between spill cavity and upper pump casing is switched to Connected state, makes water under high pressure be further continued for pressure release after flowing into overflow connection chamber through spill cavity, and pressure release back valve core two ends pressure difference is not enough to After offsetting pressurize spring pressure, valve element is pushed back origin by pressurize spring, and sealing state is recovered between spill cavity and upper pump casing, so that real Existing pressurize.

The beneficial effects of the utility model are：

Residual internal pressure is eliminated in time, improves jetting machine safety in utilization.The utility model can be by pressure retaining valve, work Mechanism's linkage of plug, push rod, the residual high internal pressure formed when jetting machine hydraulic giant is closed is outside from pressure relief through closing rifle Excretion, jetting machine upper pump casing internal pressure is maintained in rational low pressure, eliminates the safety during jetting machine use Hidden danger.

Using jetting machine operating efficiency is improved when being supplied water without hydraulic pressure, mitigate equipment attrition.The utility model passes through Mouth of a river exhaust structure can quickly discharge residual air in machine, high-pressure wash function is comparatively fast entered working condition, so as to shorten height Pressure cleaning machine starts the time, it is to avoid idle running for a long time causes equipment damage, it is ensured that jetting machine normal service life.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the present utility model；

Fig. 2 is the structural representation at another visual angle of the utility model；

Fig. 3 is a kind of structural representation of minimum living pressure device in the utility model；

Fig. 4 is a kind of structural representation of water out adapter in the utility model.

In figure, 1- upper pump casings, 2- pressure retaining valves, 3- pistons, 4- push rods, 5- microswitches, 6- cavitys, 7- necking segments, 8- limits Position step, 9- piston stoppers, the sealing rings of 10- first, the sealing rings of 11- second, 12- piston tensioning springs, 13- plugs, 14- push rods Tensioning spring, 15- valve bodies, 16- valve elements, 17- spill cavities, 18- overflows connection chamber, 19- spout holes, 20- water inlets, 21- pressurizes Spring, 22- water seals, 23- delivery ports, 24- pressurize seating springs, the sealing rings of 25- the 3rd, the sealing rings of 26- the 4th, 27- backwater holes, 28- pressure retaining valve backwater holes, the sealing rings of 29- the 5th, 30- plunger displacement pumps, 31- steam vents, 32- exhaust ducts, 33- steel balls, 34- exhaust ducts Sealing ring, 35- exhaust duct springs, 36- water out adapters, 37- motors, 38- gradient disks, 39- plungers, 40- check valves, 41- water inlets Aggregation mouthful.

Specific embodiment

The utility model is described in further detail for specific embodiment below in conjunction with the accompanying drawings.

Embodiment：

As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of jetting machine, including upper pump casing 1, plunger displacement pump 30 and minimum living press-fit Put, plunger displacement pump 30 is connected with the water inlet 20 of upper pump casing 1, minimum living pressure device is in upper pump casing 1.Plunger displacement pump 30 includes motor 37th, gradient disk 38, plunger 39, the water inlet 20 of jetting machine are located on the collateral vessel of the connection of a upper pump casing 1, in the collateral vessel Check valve 40 is provided with, the delivery port 23 of jetting machine is then positioned at one end of upper pump casing 1.The minimum living pressure device includes pressure retaining valve 2, Also include piston 3, push rod 4 and the microswitch 5 that can be triggered by push rod 4, piston 3, push rod 4 be slideably positioned in upper pump casing 1 and Strainer is provided with between upper pump casing 1, the 4th sealing ring 26, delivery port of the pressure retaining valve 2 located at upper pump casing 1 are socketed with piston 3 23 places end are simultaneously abutted with piston 3, and piston 3 is abutted with push rod 4, and microswitch 5 is located at the other end of upper pump casing 1, in upper pump casing 1 It is additionally provided with pass rifle from pressure relief and delivery port exhaust structure.Pressure retaining valve 2 includes valve body 15 and valve element 16, and valve element 16 is adaptedly slided It is dynamic to be embedded in valve body 15, spill cavity 17 and pressurize spring 21 are provided between valve body 15 and valve element 16, valve element 16 is in thin neck bottle shape, Space between the thin neck and valve body 15 of the inner of valve element 16 forms spill cavity 17, and valve element 16 is provided with control spill cavity 17 and upper pump What body 1 was connected is slidingly sealed switching construction, and it is the reducing step located at the outer end of valve element 16, valve element 16 that this is slidingly sealed switching construction Outermost diameter is less than the mid diameter of valve element 16, the 5th sealing ring 29 in the middle part of valve element 16 and valve body 15.It is provided with upper pump casing 1 Overflow connection chamber 18 with taper, overflow connection chamber 18 is connected by a water inlet aggregation mouthful 41 with the collateral vessel, and piston 3 is slided It is arranged in overflow connection chamber 18, piston 3 is provided with sealing switching construction between chamber 18 is connected with overflow, described pass rifle is from pressure release knot Structure is a spout hole 19, and spout hole 19 is outer located at overflow connection chamber 18 and is communicated to the water inlet 20 of upper pump casing 1.The one end of piston 3 Thin one end is thick, and butt end is provided with cavity 6, and taper end is installed with piston rod, and piston rod connects the end of chamber 18 with overflow and slides the company of wearing, described Sealing switching construction is the necking segment 7 on piston rod, and the adaptation slip of pressure retaining valve 2 is embedded in cavity 6, the bottom of chamber of cavity 6 In funnel-form, valve body 15 is inner tapered and is adapted to the bottom of chamber of cavity 6, and the conical surface of the inner of valve body 15 is provided with the 3rd sealing ring 25, a pressurize seating spring 24 is provided between the outer end of valve body 15 and delivery port 23, the bottom of chamber of cavity 6 is provided with a backwater hole 27, backwater hole On 27 side faces for passing to piston 3, the outer end center of valve body 15 is provided with a pressure retaining valve backwater hole 28.Limited step is provided with upper pump casing 1 8, piston stopper 9 is provided between limited step 8 and pressure retaining valve 2, piston stopper 9 constitutes the end wall that overflow connects chamber 18, and overflow connects The place end diameter of piston stopper 9 of cavity 18 is less than other end diameter, and the first sealing ring is provided between piston stopper 9 and upper pump casing 1 10, piston rod is slided to wear and is connected on piston stopper 9, and piston rod is provided with the second sealing ring 11, piston gear with the connecting portion of piston stopper 9 9 are enclosed for Split type structure, including sealing ring support and back-up ring lid.Strainer between described piston 3 and upper pump casing 1 includes set Piston tensioning spring 12 on the piston rod is connect, the two ends of piston tensioning spring 12 are connected to limited step 8 and piston pole-footing respectively Portion.Plug 13 is threaded with the inwall of upper pump casing 1 of the inner side of microswitch 5, plug 13 is embedded with water seal 22, and push rod 4 is slided Through plug 13 and water seal 22.The nearly piston end of push rod 4 is provided with the push rod termination of enlarged-diameter, described push rod 4 and upper pump casing 1 Between strainer include being socketed in push rod tensioning spring 14 on push rod 4, the two ends of push rod tensioning spring 14 are connected to top respectively On rod end head and plug 13.Described delivery port exhaust structure includes steam vent 31, exhaust duct 32, the sealing of steel ball 33, exhaust duct Circle 34 and exhaust duct spring 35, exhaust duct 32 are located between pressure retaining valve 2 and delivery port 23 and connect steam vent 31, steel ball 33, row Air flue sealing ring 34 and exhaust duct spring 35 are provided with the formation of twice step and are sequentially communicated in exhaust duct 32 in exhaust duct 32 Big footpath chamber, central diameter chamber and path chamber, big footpath chamber accommodates steel ball 33, and central diameter chamber bottom of chamber is used to support exhaust duct spring 35, steel ball 33 offset with exhaust duct spring 35.On a water out adapter 36, water out adapter 36 is threaded in upper pump casing 1 to delivery port 23 On, steam vent 31, exhaust duct 32 are on water out adapter 36.

Motor 37 drives gradient disk 38 to rotate together during work, drives plunger 39 to pump, and plunger 39 promotes list Enter water inlet aggregation mouthfuls 41 from the water suction of water inlet 20 to valve 40, top is driven pressure retaining valve 7 and pushes up out steel ball 33 again and presses exhaust duct spring 35 A contracting part, steel ball 33 is killed sealing by water under high pressure with exhaust duct sealing ring 34 after air is discharged from steam vent 31, water from Delivery port 23 flows out.When the hydraulic giant being connected on delivery port 23 closes rifle, the high back pressure of the about 10MPa produced at delivery port 23 is pushed away Dynamic pressure retaining valve 2, makes the 3rd sealing ring 25 of the inner of pressure retaining valve 2 and the wall pressure tightening seal of cavity 6 of piston 3, and high back pressure is also pushed away simultaneously Piston 3 is moved to the taper end in overflow connection chamber 18, the 4th sealing ring 26 is sealed with upper pump casing 1, and piston 3 is promoted in high back pressure Under, overcome 12 force pushing mandrils 4 of piston tensioning spring to move, the top of push rod 4 stops jetting machine to the power-off of microswitch 5 Work, while water under high pressure pushes up valve opening core 16 by pressure retaining valve backwater hole 28 compresses pressurize spring 21, the reducing step of valve element 16 is got over The 5th sealing ring 29 is crossed, the sealing between valve element 16 and valve body 15 is released, water under high pressure enters spill cavity 17, then is flowed into through backwater hole 27 In overflow connection chamber 18, while necking segment 7 departs from the second sealing ring 11, water under high pressure flows out from overflow connection chamber 18, through overflow Hole 19 overflows to water inlet 20, and it is extensive with the 5th sealing ring 29 that pressure overflow to pressurize spring 21 during about 3MPa pushes up back pressurize valve element 16 Multiple sealing, the pressure about 3MPa of the output of such delivery port 23 to hydraulic giant forms low pressure holding power-off pressurize, living when hydraulic giant is opened Plug tensioning spring 12 resets, and, also with reset, microswitch 5 also resets and is powered again, and jetting machine is again for piston 3, push rod 4 Normal work.

Claims (9)

1. a kind of jetting machine, including upper pump casing（1）, plunger displacement pump（30）With minimum living pressure device, plunger displacement pump（30）With upper pump casing （1）Water inlet（20）Connection, minimum living pressure device is located at upper pump casing（1）It is interior, it is characterized in that the minimum living pressure device includes pressurize Valve（2）, piston（3）, push rod（4）With can be by push rod（4）The microswitch of triggering（5）, piston（3）, push rod（4）It is slideably positioned in Upper pump casing（1）Interior and and upper pump casing（1）Between be provided with strainer, pressure retaining valve（2）Located at upper pump casing（1）Delivery port（23）Place Hold and and piston（3）Abut, piston（3）With push rod（4）Abut, microswitch（5）Located at upper pump casing（1）The other end, upper pump Body（1）Inside it is additionally provided with pass rifle from pressure relief.

2. jetting machine according to claim 1, it is characterized in that upper pump casing（1）Inside it is provided with overflow connection chamber（18）, it is living Plug（3）It is slideably positioned in overflow connection chamber（18）In, piston（3）Chamber is connected with overflow（18）Between be provided with sealing switching construction, institute The pass rifle stated from pressure relief be a spout hole（19）, spout hole（19）Chamber is connected located at overflow（18）It is outer and be communicated to upper pump casing （1）Water inlet（20）.

3. jetting machine according to claim 2, it is characterized in that piston（3）One end is provided with cavity（6）, the other end is fixed There is piston rod, piston rod connects chamber with overflow（18）The company of wearing is slided in end, and the sealing switching construction is on piston rod Necking segment（7）, pressure retaining valve（2）Adaptation slip is embedded at cavity（6）In.

4. jetting machine according to claim 3, it is characterized in that upper pump casing（1）In be provided with limited step（8）, limiting stand Rank（8）With pressure retaining valve（2）Between be provided with piston stopper（9）, piston stopper（9）With upper pump casing（1）Between be provided with the first sealing ring （10）, piston rod slides and wears and be connected in piston stopper（9）On, piston rod and piston stopper（9）Connecting portion is provided with the second sealing ring （11）.

5. jetting machine according to claim 3, it is characterized in that described piston（3）With upper pump casing（1）Between tensioning Mechanism includes socket piston tensioning spring on the piston rod（12）, piston tensioning spring（12）Two ends are connected to limiting stand respectively Rank（8）With piston rod root.

6. jetting machine according to claim 1, it is characterized in that upper pump casing（1）Delivery port exhaust structure is inside additionally provided with, Delivery port exhaust structure includes steam vent（31）, exhaust duct（32）, steel ball（33）, exhaust duct sealing ring（34）With exhaust duct spring （35）, exhaust duct（32）Positioned at pressure retaining valve（2）With delivery port（23）Between and connect steam vent（31）, steel ball（33）, exhaust duct Sealing ring（34）With exhaust duct spring（35）It is located at exhaust duct（32）In, steel ball（33）With exhaust duct spring（35）Offset.

7. jetting machine according to claim 1, it is characterized in that microswitch（5）The upper pump casing of inner side（1）On inwall It is installed with plug（13）, push rod（4）Slide and run through plug（13）.

8. jetting machine according to claim 7, it is characterized in that push rod（4）Nearly piston end be provided with the top of enlarged-diameter Rod end head, described push rod（4）With upper pump casing（1）Between strainer include be socketed in push rod（4）On push rod tensioning spring （14）, push rod tensioning spring（14）Two ends are connected to push rod termination and plug respectively（13）On.

9. jetting machine according to any one of claim 1 to 8, it is characterized in that pressure retaining valve（2）Including valve body（15） And valve element（16）, valve element（16）Adaptedly slide and be embedded in valve body（15）It is interior, valve body（15）And valve element（16）Between be provided with spill cavity （17）With pressurize spring（21）, valve element（16）It is provided with control spill cavity（17）With upper pump casing（1）What is connected is slidingly sealed switching Structure.