CN217699661U

CN217699661U - Pump barrel with pressure release valve

Info

Publication number: CN217699661U
Application number: CN202122028434.0U
Authority: CN
Inventors: 陈政君; 陈健
Original assignee: Taizhou Sunny Agricultural Machinery Co ltd
Current assignee: Taizhou Sunny Agricultural Machinery Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-11-01
Anticipated expiration: 2031-08-26

Abstract

A pump barrel with a pressure release valve comprises a barrel body, wherein a drawing hole transversely penetrating through the barrel body is formed in the center of the barrel body; the right end face of the cylinder is provided with an annular pressure cavity, and the pressure cavity is used for drawing Kong Weige; the left end of the cylinder body is provided with a quick joint communicated with the pressure cavity; a piston rod matched with the drawing hole is arranged in the drawing hole; the left end of the piston rod penetrates out of the drawing hole leftwards and is provided with a handle; the right end of the cylinder is in threaded connection with a right cover, and the right cover shields and seals a cavity opening at the right end of the pressure cavity; the center of the right side wall of the right cover is provided with a pressure sensing seat which is integrally formed with the right side wall; a water through hole communicated with the drawing hole is formed in the center of the side wall of the right side of the pressure sensing seat; and an opening and closing device is arranged at the orifice at the right end of the limber hole. The utility model discloses a pump barrel with relief valve can effectively avoid the pump barrel to lead to the condition that the pump barrel breaks or explodes to the liquid medicine pressure boost is excessive, stops the potential safety hazard, guarantees the security when the user uses.

Description

Pump barrel with pressure release valve

Technical Field

The utility model relates to a pump barrel, especially a pump barrel with relief valve.

Background

When the agricultural sprayer is used, liquid medicine needs to be loaded in the liquid storage tank, then the liquid medicine is drawn out from the liquid storage tank by utilizing a pump barrel like an air cylinder in a mode of drawing the piston rod and applying pressure to the liquid medicine, once the gun head of the sprayer is opened, the liquid medicine can be atomized and sprayed out from the gun head under the action of the pressure, and the spraying effect is achieved.

In pump barrel in-service use process, the mode of manual operation piston rod is very difficult to guarantee that the pull range and the pull number of times of piston rod are the same, when every pull range and pull number of times are different, the pump barrel is also different from the volume of the liquid medicine that the liquid reserve tank drawed, the pressure of production is also different, if pressure is less than normal pressure, only can influence the spraying effect, if pressure is greater than normal pressure, and continue the pressure boost still, then the condition that the pump barrel pressurized is cracked very easily appears, when serious, the condition of explosion can appear even, harm user of service's personal safety, there is serious potential safety hazard.

Disclosure of Invention

The utility model aims to solve the current technical problem and provide a pump barrel with relief valve, it can effectively avoid the pump barrel to lead to the excessive pump barrel condition of breaking or explosion to the liquid medicine pressure boost, stops the potential safety hazard, guarantees the security when the user uses.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model discloses a pump barrel with relief valve, including the barrel, its characterized in that: the center of the cylinder body is provided with a drawing hole transversely penetrating through the cylinder body; the right end face of the cylinder is provided with an annular pressure cavity, and the pressure cavity is used for drawing Kong Weige; the left end of the cylinder body is provided with a quick connector communicated with the pressure cavity; a piston rod matched with the drawing hole is arranged in the drawing hole; the left end of the piston rod penetrates out of the drawing hole leftwards and is provided with a handle; the right end of the cylinder is in threaded connection with a right cover, and the right cover shields and seals a cavity opening at the right end of the pressure cavity; the center of the right side wall of the right cover is provided with a pressure sensing seat which is integrally formed with the right side wall; a water through hole communicated with the drawing hole is formed in the center of the side wall of the right side of the pressure sensing seat; an opening and closing device is arranged at the orifice at the right end of the limber hole; and the pressure sensing seat is provided with a water suction valve and a pressure release valve.

The opening and closing device comprises a seat plate attached to the right end face of the pressure sensing seat; the outer edge of the seat plate extends rightwards to form a holding sleeve sleeved outside the pressure-sensitive seat; the clasping sleeve is provided with a plurality of clamping holes which are uniformly distributed in the circumferential direction; a plurality of clamping blocks matched with the clamping holes are arranged outside the pressure sensing seat; the left side wall of the pressure sensing seat is provided with an opening and closing pipe positioned in a hole at the right end of the limber hole; the center of the side wall of the right side of the pressure sensing seat is provided with an opening and closing hole communicated with the opening and closing pipe; a supporting ring is arranged in the left end of the opening and closing pipe; a copper ball positioned in the opening and closing pipe is arranged between the support ring and the opening and closing hole, the diameter of the copper ball is larger than that of the opening and closing hole, and the diameter of the copper ball is smaller than the inner diameter of the opening and closing pipe; the support ring right-hand member face is equipped with a plurality of anti-blocking pieces that are circumference evenly distributed, and the internal diameter that the anti-blocking piece encloses the ring configuration who closes and form is less than the copper ball diameter.

The inner wall of the pipe orifice at the left end of the opening and closing pipe is provided with an annular caulking groove, the cross section of the caulking groove is arc-shaped, the support ring is embedded in the caulking groove, and the outer wall of the support ring is attached to the inner wall of the caulking groove; the rabbet of the caulking groove is in transition connection with the left end pipe orifice of the opening and closing pipe through a conical surface which is wide at the left and narrow at the right; the lower side of the left end surface of the opening and closing pipe is provided with an elastic notch communicated with the caulking groove.

The water suction valve comprises a water suction seat arranged on the right side wall of the right cover; the water absorption seat is positioned at the lower side of the left end of the pressure sensing seat and is positioned at the left side of the opening and closing pipe; the lower surface of the water absorption seat is provided with a water inlet cavity; the water inlet cavity is communicated with the pressure cavity through a water delivery hole; the water inlet cavity is communicated with the water through hole through a water inlet hole, and the diameter of the water inlet hole is smaller than that of the water inlet cavity; a lower top cover for shielding the water inlet cavity is arranged at the cavity opening at the lower end of the water inlet cavity; a lower spring seat attached to the lower top cover is arranged in the water inlet cavity; a lower plug is arranged above the lower spring seat and blocks and seals an orifice at the lower end of the water inlet hole; a water absorbing spring is arranged between the lower plug and the lower spring seat; a first boss is arranged in the center of the lower surface of the lower plug; the upper surface of the lower spring seat is provided with a second boss which is coaxial with the first boss; the first boss is positioned in the upper part of the water absorption spring, and the second boss is positioned in the lower part of the water absorption spring.

The pressure release valve comprises a pressure release seat arranged on the right side wall of the right cover; the pressure relief seat is positioned on the upper side of the left end of the pressure sensing seat and on the left side of the opening and closing pipe; the upper surface of the pressure relief seat is provided with a pressure relief cavity; the side wall of the right side of the pressure relief seat is provided with a water outlet communicated with the pressure relief cavity; the pressure relief cavity is communicated with the limber hole through a pressure relief hole, and the diameter of the pressure relief hole is smaller than that of the pressure relief cavity; an upper top cover for shielding the upper end cavity opening of the pressure relief cavity is arranged at the upper end cavity opening of the pressure relief cavity; an upper plug for plugging and sealing an orifice at the upper end of the pressure relief hole is arranged below the upper top cover; a pressure relief spring is arranged between the upper plug and the upper top cover; the elasticity of the pressure relief spring is greater than that of the water absorption spring; a third boss is arranged in the center of the upper surface of the upper plug, and a fourth boss opposite to the third boss is arranged on the upper top cover; the upper end of the pressure relief spring is sleeved outside the fourth boss, and the lower end of the pressure relief spring is sleeved outside the third boss.

The outer wall of the part of the pressure sensing seat surrounded by the clasping sleeve and the outer wall of the lower spring seat are both provided with an annular sealing groove; a sealing ring matched with the sealing groove is arranged in the sealing groove; the lower spring seat is positioned below the water delivery hole.

The center of the right end face of the handle is provided with a plastic plug matched with the left end port of the piston rod; a left cover is screwed on the port at the left end of the drawing hole; the center of the left cover is provided with a left through hole which is coaxial with the drawing hole, and the piston rod passes through the left through hole; an auxiliary spring sleeved outside the piston rod is arranged between the handle and the left side wall of the left cover.

A gun head joint communicated with the quick joint is connected with the end part of the quick joint in an external thread way; an annular clamping step is arranged in the gun head joint and is opposite to the end face of the quick joint; a pipe joint is arranged in the gun head joint, and the right end of the pipe joint is positioned in the quick joint; the outer wall of the pipe joint is provided with an annular limiting part, and the limiting part is positioned between the clamping step and the end face of the quick joint; the pressure cavity is internally provided with a water pipe corresponding to the position of the pipe joint, a pipe orifice at the right end of the water pipe extends to the right side of the pressure cavity, and a pipe orifice at the left end of the water pipe is sleeved outside the right end of the pipe joint.

A filter pipe extends rightwards from the outer edge of the seat plate; the inner wall of the filter pipe is provided with an annular clamping groove; a filter screen is arranged in the filter pipe, and the outer edge of the filter screen is clamped in the clamping groove; the filter screen is arc cover shape.

The front side and the rear side of the left end of the pressure sensing seat are mutually symmetrical connecting plates; the outer walls of the front side and the rear side of the left end of the pressure sensing seat are provided with positioning blocks which are symmetrical to each other; the connecting plate is provided with a positioning hole matched with the positioning block; the upper part and the lower part of the connecting plate are both provided with a lock hole; the front end and the rear end of the upper top cover extend downwards to form an upper side plate; the front end and the rear end of the lower top cover extend upwards to form lower side plates; go up the side panel lower extreme and all be equipped with the locking piece with the lower side panel upper end, go up the locking piece of side panel lower extreme and the lockhole phase-match on connecting plate upper portion, the locking piece of lower side panel upper end and the lockhole phase-match of connecting plate lower part.

The utility model has the advantages that:

compared with the prior art, adopt the utility model discloses pump barrel accessible suction valve with relief valve of structure is constantly with the continuous suction of liquid medicine in the liquid reserve tank of atomizer to the pressure intracavity of pump barrel, and make the pressure chamber be full of corresponding pressure, open the back when the rifle head of atomizer, the pressure of pressure intracavity then can be sent to the rifle head to the liquid medicine of pressure intracavity, and from rifle head atomizing blowout, accomplish spraying work, constantly lead to the liquid medicine suction in the liquid reserve tank of atomizer to the pump barrel when too big pressure when water suction valve, the relief valve then can be with unnecessary liquid medicine discharge, play the effect of pressure release, avoid the too big condition that leads to the pump barrel to break or explode of pump barrel internal pressure, effectively stop the potential safety hazard, meanwhile, when balanced pump barrel internal pressure, also maintain the pressure of pump barrel inside at a definite value, and under a stable operating pressure effect, the spraying effect is better.

Drawings

FIG. 1 is a cross-sectional view of a pump barrel with a pressure relief valve according to the present invention;

FIG. 2 is an enlarged view of section A of FIG. 1;

FIG. 3 is a partial cross-sectional view of the pump barrel with a pressure relief valve of the present invention;

FIG. 4 is a schematic structural view of a right cover;

FIG. 5 is a schematic structural view of the support ring assembled with the opening and closing tube;

FIG. 6 is a schematic view of the structure of the upper and lower caps fixed to the pressure-sensitive base by the connecting plate.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

referring to fig. 1 to 6, the present invention provides a pump barrel with a pressure release valve, including a barrel body 1, wherein a drawing hole 2 transversely penetrating through the barrel body 1 is arranged at the center of the barrel body 1; the right end face of the cylinder body 1 is provided with an annular pressure cavity 3, and the pressure cavity 3 encloses the drawing hole 2; the left end of the cylinder body 1 is provided with a quick joint 4 communicated with the pressure cavity 3; a piston rod 5 matched with the drawing hole 2 is arranged in the drawing hole; the left end of the piston rod 5 penetrates out of the drawing hole 2 leftwards and is provided with a handle 6; the right end of the cylinder body 1 is in threaded connection with a right cover 7, and the right cover 7 shields and seals the right end opening of the pressure cavity 3; the center of the right side wall of the right cover 7 is provided with a pressure sensing seat 8 which is integrally formed with the right side wall; a water through hole 9 communicated with the drawing hole 2 is formed in the center of the side wall of the right side of the pressure sensing seat 8; an opening and closing device is arranged at the orifice at the right end of the limber hole 9; and a water suction valve and a pressure relief valve are arranged on the pressure sensing seat 8.

The opening and closing device comprises a seat plate 10 attached to the right end face of the pressure sensing seat 8; the outer edge of the seat plate 10 extends rightwards to form a clasping sleeve 11 sleeved outside the pressure-sensitive seat 8; the clasping sleeve 11 is provided with a plurality of clamping holes 12 which are uniformly distributed in the circumferential direction; a plurality of clamping blocks 13 matched with the clamping holes 12 are arranged outside the pressure sensing seat 8; the left side wall of the pressure sensing seat 8 is provided with an opening and closing pipe 14 positioned in a hole at the right end of the limber hole 9; the center of the side wall of the right side of the pressure sensing seat 8 is provided with an opening and closing hole 15 communicated with the opening and closing pipe 14; a supporting ring 16 is arranged in the left end of the opening and closing pipe 14; a copper ball 17 positioned in the opening and closing pipe 14 is arranged between the support ring 16 and the opening and closing hole 15, the diameter of the copper ball 17 is larger than that of the opening and closing hole 15, and the diameter of the copper ball 17 is smaller than the inner diameter of the opening and closing pipe 14; the right end face of the support ring 16 is provided with a plurality of anti-blocking blocks 18 which are uniformly distributed in the circumferential direction, and the inner diameter of an annular structure formed by enclosing the anti-blocking blocks 18 is smaller than the diameter of the copper ball 17.

An annular caulking groove 19 is formed in the inner wall of the pipe orifice at the left end of the opening and closing pipe 14, the cross section of the caulking groove 19 is arc-shaped, the support ring 16 is embedded in the caulking groove 19, and the outer wall of the support ring 16 is attached to the inner wall of the caulking groove 19; the rabbet of the caulking groove 19 is in transition connection with the left end pipe orifice of the opening and closing pipe 14 through a conical surface 20 which is wide at the left and narrow at the right; an elastic gap 21 communicated with the caulking groove 19 is arranged on the lower side of the left end face of the opening and closing tube 14.

The water suction valve comprises a water suction seat 22 arranged on the right side wall of the right cover 7; the water absorbing seat 22 is positioned at the lower side of the left end of the pressure sensing seat 8 and at the left side of the opening and closing pipe 14; the lower surface of the water absorbing seat 22 is provided with a water inlet cavity 23; the water inlet cavity 23 is communicated with the pressure cavity 3 through a water delivery hole 24; the water inlet cavity 23 is communicated with the limber hole 9 through a water inlet hole 25, and the diameter of the water inlet hole 25 is smaller than that of the water inlet cavity 23; a lower top cover 26 for shielding the lower end cavity opening of the water inlet cavity 23 is arranged at the lower end cavity opening of the water inlet cavity; a lower spring seat 27 attached to the lower top cover 26 is arranged in the water inlet cavity 23; a lower plug 28 is arranged above the lower spring seat 27, and the lower plug 28 plugs and seals the lower end orifice of the water inlet 25; a water absorbing spring 29 is arranged between the lower plug 28 and the lower spring seat 27; a first boss 30 is arranged at the center of the lower surface of the lower plug 28; the upper surface of the lower spring seat 27 is provided with a second boss 31 which is coaxial with the first boss 30; the first boss 30 is located in the upper portion of the water absorbing spring 29, and the second boss 31 is located in the lower portion of the water absorbing spring 29.

The pressure release valve comprises a pressure release seat 32 arranged on the right side wall of the right cover 7; the pressure relief seat 32 is positioned at the upper side of the left end of the pressure sensing seat 8 and at the left side of the opening and closing tube 14; the upper surface of the pressure relief seat 32 is provided with a pressure relief cavity 33; a water outlet 34 communicated with the pressure relief cavity 33 is arranged on the side wall of the right side of the pressure relief seat 32; the pressure relief cavity 33 is communicated with the limber hole 9 through a pressure relief hole 35, and the diameter of the pressure relief hole 35 is smaller than that of the pressure relief cavity 33; an upper top cover 36 for shielding the upper end cavity opening of the pressure relief cavity 33 is arranged at the upper end cavity opening of the pressure relief cavity; an upper plug 37 for plugging and sealing the orifice at the upper end of the pressure relief hole 35 is arranged below the upper top cover 36; a pressure relief spring 38 is arranged between the upper plug 37 and the upper top cover 36; the elastic force of the pressure relief spring 38 is greater than that of the water absorption spring 29; a third boss 39 is arranged in the center of the upper surface of the upper plug 37, and a fourth boss 40 opposite to the third boss 39 is arranged on the upper top cover 36; the upper end of the pressure relief spring 38 is sleeved outside the fourth boss 40, and the lower end of the pressure relief spring 38 is sleeved outside the third boss 39.

The outer wall of the part of the pressure-sensitive seat 8 surrounded by the clasping sleeve 11 and the outer wall of the lower spring seat 27 are both provided with an annular sealing groove 41; a sealing ring 42 matched with the sealing groove 41 is arranged in the sealing groove; the lower spring seat 27 is located below the water delivery hole 24.

The center of the right end face of the handle 6 is provided with a plastic plug 43 matched with the left end port of the piston rod 5; a left cover 44 is screwed with the port at the left end of the drawing hole 2; the center of the left cover 44 is provided with a left through hole 45 which is coaxial with the drawing hole 2, and the piston rod 5 passes through the left through hole 45; an auxiliary spring 46 sleeved outside the piston rod 5 is arranged between the handle 6 and the left side wall of the left cover 44.

A gun head joint 47 communicated with the end part of the quick joint 4 is connected with the end part of the quick joint in an external thread way; an annular clamping step 48 is arranged in the gun head joint 47, and the clamping step 48 is opposite to the end face of the quick joint 4; a pipe joint 49 is arranged in the gun head joint 47, and the right end of the pipe joint 49 is positioned in the quick joint 4; the outer wall of the pipe joint 49 is provided with an annular limiting part 50, and the limiting part 50 is positioned between the clamping step 48 and the end face of the quick joint 4; a water pipe 51 corresponding to the pipe joint 49 is arranged in the pressure chamber 3, a pipe orifice at the right end of the water pipe 51 extends to the right side of the pressure chamber 3, and a pipe orifice at the left end of the water pipe 51 is sleeved outside the right end of the pipe joint 49.

A filter pipe 52 extends rightwards from the outer edge of the base plate 10; the inner wall of the filter pipe 52 is provided with an annular clamping groove 53; a filter screen 54 is arranged in the filter pipe 52, and the outer edge of the filter screen 54 is clamped in the clamping groove 53; the filter screen 54 is arc-shaped.

The front side and the rear side of the left end of the pressure sensing seat 8 are mutually symmetrical connecting plates 55; the outer walls of the front side and the rear side of the left end of the pressure sensing seat 8 are provided with positioning blocks 56 which are symmetrical to each other; the connecting plate 55 is provided with a positioning hole 57 matched with the positioning block 56; the upper part and the lower part of the connecting plate 55 are both provided with a lock hole 58; the front end and the rear end of the upper top cover 36 extend downwards to form an upper side plate 59; the front end and the rear end of the lower top cover 26 extend upwards to form a lower side plate 60; the lower end of the upper side plate 59 and the upper end of the lower side plate 60 are both provided with a locking block 61, the locking block 61 at the lower end of the upper side plate 59 is matched with the locking hole 58 at the upper part of the connecting plate 55, and the locking block 61 at the upper end of the lower side plate is matched with the locking hole 58 at the lower part of the connecting plate 55.

The utility model discloses a use method as follows:

the pump cylinder is before using, place 1 right-hand member of barrel down, then directly pack into barrel 1 in the liquid reserve tank of atomizer, the 1 right-hand member of barrel in the liquid reserve tank of packing into this moment is in liquid reserve tank bottom position, only quick-operation joint 4 is outside the liquid reserve tank with hand (hold) 6 simultaneously, then quick-operation joint 4 then accessible gun head joint 47 is connected with the rifle head of atomizer, and accessible hose or spray lance are connected between gun head joint 47 and the rifle head, before the atomizer uses at last, can pack the liquid medicine into the liquid reserve tank.

When the sprayer needs to be used, a part of liquid medicine can be pressurized firstly, so that once the gun head is opened, the liquid medicine is directly atomized and sprayed out under the action of pressure to finish spraying work, when a part of liquid medicine needs to be pressurized, the piston rod 5 can be pulled through the handle 6 to enable the piston rod 5 to move towards the outside of the drawing hole 2, the air pressure in the drawing hole 2 changes, the drawing hole 2 is communicated with the limber hole 9, the liquid medicine externally surrounding the barrel body 1 can push the copper ball 17 to enable the copper ball 17 to move towards the direction of the piston rod 5, the copper ball 17 does not block the opening and closing hole 15 any more, the copper ball 17 can enter the opening and closing pipe 14 through the opening and closing hole 15, then the liquid medicine flows out from the opening and closing pipe 14 sequentially through the gap between the anti-blocking blocks 18 and the inner hole of the support ring 16, and finally enters the drawing hole 2, after a part of the liquid medicine is drawn into the drawing hole 2, the piston rod 5 can be pushed by the handle 6 again, so that the piston rod 5 contracts towards the drawing hole 2, at the moment, the piston rod 5 is continuously close to the copper ball 17, the space capable of containing the liquid medicine drawn into the drawing hole 2 is continuously reduced, the pressure is continuously increased, the pressure can directly act on the copper ball 17, the copper ball 17 is blocked on the left end orifice of the opening and closing hole 15 under the action of air pressure, the opening and closing hole is in a closed state, and the external liquid medicine cannot enter the opening and closing pipe 14 through the opening and closing hole 15.

Under the condition that the opening and closing hole 15 is closed, because the elasticity of the water absorption spring 29 is smaller than the elasticity of the pressure release spring 38, along with the extrusion of the liquid medicine between the piston rod 5 and the copper ball 17, the pressure of the liquid medicine is firstly greater than the elasticity of the water absorption spring 29, at the moment, the pressure of the liquid medicine pushes the lower plug to enable the lower plug 28 to be away from the water inlet 25, at the moment, the lower plug 28 does not block the water inlet 25 any more, the liquid medicine between the piston rod 5 and the copper ball 17 can enter the water inlet cavity 23 through the water inlet 25 and then enters the pressure cavity 3 through the water delivery hole 24, along with the repeated pulling of the piston rod 5 by a user, the liquid medicine in the liquid storage tank of the sprayer can be continuously sent into the pressure cavity 3, finally, the pressure cavity 3 is filled with the liquid medicine and generates pressure, when the gun head is opened, the liquid medicine in the pressure cavity can be sent to the position of the gun head and atomized from the gun head, and the spraying work of the sprayer is completed.

Under the condition that pressure chamber 3 is full of the liquid medicine and there is pressure, liquid medicine between piston rod 5 and the copper ball 17 if will enter into intake antrum 23 from inlet opening 25, then need to resist the elasticity of absorbing spring 29 and the pressure of the liquid medicine in the pressure chamber 3 simultaneously, then need promote piston rod 5 by force through hand (hold) 6 this moment, just can extrude the liquid medicine between piston rod 5 and the copper ball 17, very easily lead to the liquid medicine between piston rod 5 and the copper ball 17 because the too big condition of pressure appears excessively by the extrusion, if last liquid medicine suction in the liquid reserve tank of atomizer to the pump barrel in, the condition of explosion very easily appears, and the relief valve then can play the effect of equilibrium pressure at this moment, avoid the too big condition that leads to the pump barrel to rupture or explode of pump barrel internal pressure.

When the liquid medicine between the piston rod 5 and the copper ball 17 is pressed by the piston rod forcibly to cause overlarge pressure, the pressure is larger than the elastic force of the pressure relief spring 38, and the elastic force of the pressure relief spring 38 is smaller than the sum of the elastic force of the water absorption spring 29 and the pressure of the pressure chamber 3, so that the liquid medicine between the piston rod 5 and the copper ball 17 can push the upper plug 37 through the pressure relief hole 35, the upper plug 37 is far away from the pressure relief hole 35, the pressure relief hole 35 is not blocked by the upper plug 37 any more, the liquid medicine between the piston rod 5 and the copper ball 17 enters the pressure relief chamber 33 through the pressure relief hole 35, the excessive space can play an effective pressure relief effect, the pressure between the piston rod 5 and the copper ball 17 is reduced, and the liquid medicine entering the pressure relief chamber 33 is finally discharged to the outside from the water discharge port 34, because the pump cylinder is wholly installed in the liquid storage tank of the sprayer, after the liquid medicine is discharged from the water discharge port 34, the liquid medicine can directly return to the liquid storage tank of the sprayer and can be reused, the situation that the liquid medicine is wasted cannot occur, along with the continuous discharge of the excessive liquid medicine, the pressure of the liquid medicine between the piston rod 5 and the copper ball 17 can be continuously reduced and finally returns to normal, along with the continuous spraying of the liquid medicine in the pressure cavity 3 through the gun head of the sprayer, the sum of the pressure in the pressure cavity 3 and the elastic force of the water absorption spring 29 is smaller than the elastic force of the pressure relief spring 38, at the moment, along with the continuous extrusion of the liquid medicine between the piston rod 5 and the copper ball 17 by the piston rod 5, the liquid medicine can push the lower plug 28 to enter the water inlet cavity 23 through the water inlet hole 25 and then enter the pressure cavity 3 for use, and the upper plug 37 always blocks the pressure relief hole 35 under the elastic force of the pressure relief spring 38.

Therefore, the whole principle process is as follows: the handle is pumped, the copper ball is opened to absorb water, the handle is pressed, the copper ball is closed to pressurize, the water absorbing spring is compressed, the water absorbing valve is opened to discharge water, the water is pumped and pressed for a plurality of times, when the pressure reaches over 0.35MPa (working pressure is confirmed not to be reduced for 3 seconds), the pressure relief spring starts to compress, the pressure relief valve is opened to discharge water, and the reciprocating operation is carried out, so that the stability of the pressure inside the pump barrel is effectively guaranteed, and the condition that the internal pressure is too large is avoided.

To sum up, can know, the utility model discloses the accessible suction valve constantly with the continuous suction of liquid medicine in the liquid reserve tank of atomizer in the pressure chamber 3 to the pump barrel, and make pressure chamber 3 be full of corresponding pressure, open the back when the rifle head of atomizer, pressure in the pressure chamber 3 then can be sent to the rifle head to the liquid medicine in the pressure chamber 3, and from rifle head atomizing blowout, accomplish spraying work, when the suction valve constantly leads to pressure when too big in liquid medicine suction to the pump barrel in with the liquid reserve tank of atomizer, the relief valve then can discharge unnecessary liquid medicine, the effect of pressure release is played, avoid the too big condition that leads to the pump barrel to break or explode of pump barrel internal pressure, effectively stop the potential safety hazard, meanwhile, the relief valve is when balanced pump barrel internal pressure, also maintain a definite value with the pressure of pump barrel inside, and under a stable operating pressure effect, spraying effect is better.

The center of the lower surface of the lower plug 28 is provided with a first boss 30, the upper surface of the lower spring seat 27 is provided with a second boss 31 coaxial with the first boss 30, the first boss 30 is positioned in the upper part of the water absorption spring 29, the second boss 31 is positioned in the lower part of the water absorption spring 29, and the existence of the first boss 30 and the second boss 31 can ensure the stability of the water absorption spring 29 when being compressed and expanded, so that the stability of the lower plug 28 when moving is ensured.

Go up end cap 37 upper surface center and be equipped with third boss 39, go up the top cap 36 and be equipped with the fourth boss 40 relative with third boss 39, pressure release spring 38 upper end cover is outside fourth boss 40, and pressure release spring 38 lower extreme cover is outside third boss 39, and the stability when pressure release spring 38 is compressed and opens can be guaranteed in the existence of third boss 39 and fourth boss 40 to stability when guaranteeing to go up end cap 37 and remove.

The inner wall of the left end pipe orifice of the opening and closing pipe 14 is provided with an annular caulking groove 19, the cross section of the caulking groove 19 is arc-shaped, the support ring 16 is embedded in the caulking groove 19, the outer wall of the support ring 16 is attached to the inner wall of the caulking groove 19, the notch of the caulking groove 19 is in transitional connection with the left end pipe orifice of the opening and closing pipe 14 through a conical surface 20 with a wide left side and a narrow right side, and the lower side of the left end surface of the opening and closing pipe 14 is provided with an elastic notch 21 communicated with the caulking groove 19, so that the opening and closing pipe 14 and the support ring 16 are convenient to assemble and disassemble, the left end of the opening and closing pipe 14 can be deformed to a certain degree due to the elastic notch 21, when the support ring 16 is extruded towards the caulking groove 19 along the track of the conical surface 20, the support ring 16 can prop open the left end of the opening and closing pipe 14, and when the support ring 16 slides into the caulking groove 19, the left end of the opening and closing pipe 14 is restored.

The outer wall of the part of the pressure sensing seat 8 surrounded by the clasping sleeve 11 and the outer wall of the lower spring seat 27 are both provided with an annular sealing groove 41, a sealing ring 42 matched with the sealing groove 41 is arranged in the sealing groove 41, the lower spring seat 27 is positioned below the water delivery hole 24, and the existence of the sealing ring 42 can effectively improve the sealing performance between the clasping sleeve 11 and the pressure sensing seat 8 and the sealing performance between the lower spring seat 27 and the water inlet cavity 23.

Handle 6 right-hand member face center is equipped with one and piston rod 5's left end port assorted plastics and blocks up 43, draw hole 2 left end port spiro union has a left cover 44, left cover 44 center is equipped with one and draws hole 2 coaxial left perforation 45, piston rod 5 passes left perforation 45, when user promotes piston rod 5 through handle 6 and is close to the copper ball, axle sleeve 43 is close to towards left cover 44 thereupon, left cover 44 is fixed motionless, auxiliary spring 46 that is located between handle 6 and left cover 44 is compressed and produces elasticity, auxiliary spring 46's elasticity can play the additional action when user passes through handle 6 with piston rod 5 towards draw hole 2 outer pulling, make user's relaxation when pulling piston rod 5, be convenient for carry out reciprocal pull to piston rod 5 fast.

A gun head joint 47 communicated with the quick joint 4 is externally screwed at the end part of the quick joint 4, an annular clamping step 48 is arranged in the gun head joint 47, and the clamping step 48 is opposite to the end surface of the quick joint 4; the utility model discloses a liquid medicine conveying device, including rifle head joint 47, rifle head joint 49, the right-hand member of pipe joint 49 is located quick-operation joint 4, the outer wall of pipe joint 49 is equipped with one and is the spacing portion 50 of annular, spacing portion 50 is located between screens step 48 and the quick-operation joint 4 terminal surface, be equipped with a raceway 51 corresponding with pipe joint 49 position in the pressure chamber 3, raceway 51 left end mouth of pipe overlaps outside pipe joint 49 right-hand member, when the pump barrel is installed in the liquid reserve tank, the original right-hand member of pump barrel is down, therefore the right side of pressure chamber 3 also is down at this moment, and raceway 51 right-hand member mouth of pipe extends to the pressure chamber 3 right side, therefore raceway 51 is in the bottommost end of pressure chamber 3 this moment, can carry the liquid medicine in the maximum with the pressure chamber 3 to the external world, avoid raceway 51 tip to keep away from the pressure chamber 3 downside chamber wall and lead to the partial liquid medicine in the pressure chamber 3 just can's unable condition of carrying remaining liquid medicine to the external world after being carried.

The outer edge of the seat plate 10 extends rightwards to form a filter pipe 52, and the inner wall of the filter pipe 52 is provided with an annular clamping groove 53; be equipped with a filter screen 54 in the filter tube 52, filter screen 54 outside is along the card in draw-in groove 53, and filter screen 54 is the arc cover form, and filter screen 54 can filter before the liquid medicine suction in the liquid reserve tank with the atomizer to the pump barrel in, avoids the too much condition that leads to carrying the passageway jam of liquid medicine of piling up in the pump barrel of debris in the liquid medicine.

The front side and the rear side of the left end of the pressure sensing seat 8 are mutually symmetrical connecting plates 55, the front side and the rear side of the left end of the pressure sensing seat 8 are provided with mutually symmetrical positioning blocks 56, and the connecting plates 55 are provided with positioning holes 57 matched with the positioning blocks 56; the upper part and the lower part of the connecting plate 55 are both provided with a lock hole 58, and the front end and the rear end of the upper top cover 36 extend downwards to form an upper side plate 59; lower side plate 60 upwards extends from both ends around lower top cap 26, the lower extreme of last side plate 59 and lower side plate 60 upper end all are equipped with locking piece 61, the locking piece of last side plate 59 lower extreme matches with lockhole 58 on connecting plate 55 upper portion, locking piece 61 of lower side plate 60 upper end matches with lockhole 58 on connecting plate 55 lower part, only need pull out locking piece 61 from lockhole 58 on connecting plate 55, just can accomplish the dismantlement of upper top cap 36 and lower top cap 26, the change and the maintenance of the part in decompression chamber 33 and the intake antrum 23 of being convenient for of this kind of quick dismantlement mode.

Claims

1. The utility model provides a pump cylinder with relief valve, includes the barrel, its characterized in that: the center of the cylinder body is provided with a drawing hole which transversely penetrates through the cylinder body; the right end face of the cylinder is provided with an annular pressure cavity, and the pressure cavity is used for drawing Kong Weige; the left end of the cylinder body is provided with a quick connector communicated with the pressure cavity; a piston rod matched with the drawing hole is arranged in the drawing hole; the left end of the piston rod penetrates out of the drawing hole leftwards and is provided with a handle; the right end of the cylinder is in threaded connection with a right cover, and the right cover shields and seals a cavity opening at the right end of the pressure cavity; the center of the right side wall of the right cover is provided with a pressure sensing seat which is integrally formed with the right side wall; a water through hole communicated with the drawing hole is formed in the center of the side wall of the right side of the pressure sensing seat; an opening and closing device is arranged at the orifice at the right end of the limber hole; and a water suction valve and a pressure relief valve are arranged on the pressure sensing seat.

2. The pump barrel with pressure relief valve according to claim 1, wherein: the opening and closing device comprises a seat plate attached to the right end face of the pressure sensing seat; the outer edge of the seat plate extends rightwards to form a holding sleeve sleeved outside the pressure-sensitive seat; the clasping sleeve is provided with a plurality of clamping holes which are uniformly distributed in the circumferential direction; a plurality of clamping blocks matched with the clamping holes are arranged outside the pressure sensing seat; the left side wall of the pressure sensing seat is provided with an opening and closing pipe positioned in a hole at the right end of the limber hole; the center of the side wall of the right side of the pressure sensing seat is provided with an opening and closing hole communicated with the opening and closing pipe; a supporting ring is arranged in the left end of the opening and closing pipe; a copper ball positioned in the opening and closing pipe is arranged between the support ring and the opening and closing hole, the diameter of the copper ball is larger than that of the opening and closing hole, and the diameter of the copper ball is smaller than the inner diameter of the opening and closing pipe; the support ring right-hand member face is equipped with a plurality of anti-blocking pieces that are circumference evenly distributed, and the internal diameter that the anti-blocking piece encloses the ring configuration who closes and form is less than the copper ball diameter.

3. The pump barrel with pressure relief valve according to claim 2, characterized in that: the inner wall of the pipe orifice at the left end of the opening and closing pipe is provided with an annular caulking groove, the cross section of the caulking groove is arc-shaped, the support ring is embedded in the caulking groove, and the outer wall of the support ring is attached to the inner wall of the caulking groove; the rabbet of the caulking groove is in transition connection with the left end pipe orifice of the opening and closing pipe through a conical surface which is wide at the left and narrow at the right; the lower side of the left end surface of the opening and closing pipe is provided with an elastic notch communicated with the caulking groove.

4. The pump barrel with pressure relief valve according to claim 2, characterized in that: the water suction valve comprises a water suction seat arranged on the right side wall of the right cover; the water absorption seat is positioned at the lower side of the left end of the pressure sensing seat and positioned at the left side of the opening and closing pipe; the lower surface of the water absorption seat is provided with a water inlet cavity; the water inlet cavity is communicated with the pressure cavity through a water delivery hole; the water inlet cavity is communicated with the limber hole through a water inlet hole, and the diameter of the water inlet hole is smaller than that of the water inlet cavity; a lower top cover for shielding the water inlet cavity is arranged at the cavity opening at the lower end of the water inlet cavity; a lower spring seat attached to the lower top cover is arranged in the water inlet cavity; a lower plug is arranged above the lower spring seat and blocks and seals an orifice at the lower end of the water inlet hole; a water absorbing spring is arranged between the lower plug and the lower spring seat; a first boss is arranged in the center of the lower surface of the lower plug; the upper surface of the lower spring seat is provided with a second boss which is coaxial with the first boss; the first boss is positioned in the upper part of the water absorption spring, and the second boss is positioned in the lower part of the water absorption spring.

5. The pump barrel with pressure relief valve according to claim 4, characterized in that: the pressure release valve comprises a pressure release seat arranged on the right side wall of the right cover; the pressure relief seat is positioned on the upper side of the left end of the pressure sensing seat and on the left side of the opening and closing pipe; the upper surface of the pressure relief seat is provided with a pressure relief cavity; the side wall of the right side of the pressure relief seat is provided with a water outlet communicated with the pressure relief cavity; the pressure relief cavity is communicated with the limber hole through a pressure relief hole, and the diameter of the pressure relief hole is smaller than that of the pressure relief cavity; an upper top cover for shielding the upper end cavity opening of the pressure relief cavity is arranged at the upper end cavity opening of the pressure relief cavity; an upper plug for plugging and sealing an orifice at the upper end of the pressure relief hole is arranged below the upper top cover; a pressure relief spring is arranged between the upper plug and the upper top cover; the elasticity of the pressure relief spring is greater than that of the water absorption spring; a third boss is arranged in the center of the upper surface of the upper plug, and a fourth boss opposite to the third boss is arranged on the upper top cover; the upper end of the pressure relief spring is sleeved outside the fourth boss, and the lower end of the pressure relief spring is sleeved outside the third boss.

6. The pump barrel with pressure relief valve according to claim 4, characterized in that: the outer wall of the part of the pressure-sensitive seat surrounded by the clasping sleeve and the outer wall of the lower spring seat are both provided with an annular sealing groove; a sealing ring matched with the sealing groove is arranged in the sealing groove; the lower spring seat is positioned below the water delivery hole.

7. The pump barrel with pressure relief valve according to claim 1, characterized in that: the center of the right end face of the handle is provided with a plastic plug matched with the left end port of the piston rod; a left cover is screwed on the port at the left end of the drawing hole; the center of the left cover is provided with a left through hole which is coaxial with the drawing hole, and the piston rod passes through the left through hole; an auxiliary spring sleeved outside the piston rod is arranged between the handle and the left side wall of the left cover.

8. The pump barrel with pressure relief valve according to claim 1, characterized in that: a gun head joint communicated with the quick joint is connected with the end part of the quick joint in an external thread way; an annular clamping step is arranged in the gun head joint and is opposite to the end face of the quick joint; a pipe joint is arranged in the gun head joint, and the right end of the pipe joint is positioned in the quick joint; the outer wall of the pipe joint is provided with an annular limiting part, and the limiting part is positioned between the clamping step and the end face of the quick joint; the pressure cavity is internally provided with a water pipe corresponding to the position of the pipe joint, a pipe orifice at the right end of the water pipe extends to the right side of the pressure cavity, and a pipe orifice at the left end of the water pipe is sleeved outside the right end of the pipe joint.

9. The pump barrel with pressure relief valve according to claim 2, characterized in that: a filter pipe extends rightwards from the outer edge of the seat plate; the inner wall of the filter pipe is provided with an annular clamping groove; a filter screen is arranged in the filter pipe, and the outer edge of the filter screen is clamped in the clamping groove; the filter screen is arc cover shape.

10. The pump barrel with pressure relief valve according to claim 5, characterized in that: the front side and the rear side of the left end of the pressure sensing seat are mutually symmetrical connecting plates; the outer walls of the front side and the rear side of the left end of the pressure sensing seat are provided with positioning blocks which are symmetrical to each other; the connecting plate is provided with a positioning hole matched with the positioning block; the upper part and the lower part of the connecting plate are both provided with a lock hole; the front end and the rear end of the upper top cover extend downwards to form an upper side plate; the front end and the rear end of the lower top cover extend upwards to form lower side plates; the lower end of the upper side plate and the upper end of the lower side plate are both provided with a locking block, the locking block at the lower end of the upper side plate is matched with a locking hole in the upper part of the connecting plate, and the locking block at the upper end of the lower side plate is matched with a locking hole in the lower part of the connecting plate.