A kind of automatic reciprocating fluid pressure valve device of compact type
Technical field
The present invention relates to a kind of valve, specially a kind of automatic reciprocating fluid pressure valve device of compact type.
Background technology
Valve is mainly used to be controlled action object in current market, and this control is relatively simple.
The control instruction of valve needs extraneous input, and the mode of control probably has electromagnetism, hydraulic control, manual etc..When involving the need for by liquid
Pressure valve itself is sent in the field of different control instructions, and existing product category is not complete enough, can not meet the needs of market.And
And its internal structure is often excessively complicated, by electronic component, processing cost is too high, and performance is unstable.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned prior art, there is provided one kind fully relies on Mechanical course, is not required to
Want that electric elements, simple and compact for structure, echo speed are fast, occupy that space is small, service life is long, assembling and structure easy to maintenance
The automatic reciprocating fluid pressure valve device of compact.
Realizing the technical scheme of above-mentioned purpose is:A kind of automatic reciprocating fluid pressure valve device of compact type, it is characterised in that:
Including valve body, the middle part in valve body is provided with spool chamber, is slided in spool chamber and is provided with reversing valve core, reversing valve core is in spool chamber
Two stations in left and right are inside provided with, detent mechanism is additionally provided between reversing valve core and valve body, the detent mechanism is used to change
When being in two stations in left and right to valve element, reversing valve core is positioned in cylinder body;
The both sides of spool chamber are provided with the plunger shaft being arranged symmetrically, and are separately provided for promoting reversing valve core or so in plunger shaft
The piston of Switch of working position and the piston rod being connected on piston, are respectively arranged with step on the inside of plunger shaft, in plunger shaft
Back-moving spring is respectively arranged between piston and step;
The first annular groove and the second annular groove in left and right arrangement are provided with the reversing valve core, pressure oil is provided with valve body
Mouth, oil return opening, the first actuator port, the second actuator port, be provided with valve body connected with pressure oil port pressure oil inlet passage,
The first drainback passage and the second drainback passage that are connected respectively with oil return opening, the first working oil connected with the first actuator port
Road, the second work oil ducts connected with the second actuator port, connect with the rodless cavity of the first work oil ducts and right hand piston chamber
First oil transportation channel, the second oil transportation channel connected with the rodless cavity of the second work oil ducts and left hand piston chamber;
When reversing valve core is in left position, pressure oil inlet passage by the second annular groove respectively with the second work oil ducts, second defeated
Oily passage connection, the first work oil ducts are connected by first annular groove with the first drainback passage;When reversing valve core is in right position,
Pressure oil inlet passage is connected with the first work oil ducts, the first oil transportation channel respectively by first annular groove, and the second work oil ducts are led to
The second annular groove is crossed to connect with the second drainback passage.
Further, the plunger shaft of the valve body both sides is opening, and the both ends of valve body are connected by bolt seal respectively
There is bonnet.
Further, it is respectively arranged with sealing ring between the plunger shaft of the valve body both sides and respective side bonnet.
Further, the detent mechanism, the detent mechanism are respectively arranged between the both sides of reversing valve core and valve body
Positioning hole including being arranged on reversing valve core upper surface, the section of positioning hole are in hold upward isosceles trapezoid, the inwall of valve body greatly
On be provided with mounting groove, be provided with mounting groove with positioning hole coordinate locating piece, spring is provided between locating piece and bottom land;
When reversing valve core is in left position, the locating piece positioned at the detent mechanism in left side coordinates in corresponding positioning hole;When changing
When being in right position to valve element, the locating piece positioned at the detent mechanism on right side coordinates in corresponding positioning hole.
The beneficial effects of the invention are as follows:The present invention can be in the case of no other external commands control, according to oneself
Work situation about carrying out, it is automatic to change reversing valve core position, make reversing valve core automatic reciprocating.And commutation ability is stable, knot
Structure simple and compact, echo speed are fast, occupy space is small, service life is long, good sealing effect, assembling and easy to maintenance.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of detent mechanism;
Fig. 3 is that the reversing valve core of the present invention is in the structural representation of right position;
Fig. 4 is that the reversing valve core of the present invention is in the structural representation of left position.
Embodiment
As shown in figure 1, the present invention includes valve body 1, the middle part in valve body 1 is provided with spool chamber 2, and setting is slided in spool chamber
There is reversing valve core 3, the plunger shaft 5 penetrated with reversing valve core 3 being arranged symmetrically, piston are provided with the valve body 1 of the both sides of spool chamber 3
The outer end of chamber 5 is opening, and the both ends of valve body 1 are sealedly connected with bonnet 7, the plunger shaft 5 of the both sides of valve body 1 by bolt 6 respectively
Sealing ring 30 is respectively arranged between respective side bonnet 7.
Reversing valve core 3 is provided with two stations in left and right in spool chamber 2, and being separately provided for promotion in plunger shaft 5 changes
Piston 8 to the Switch of working position of valve element 3 or so and the piston rod 9 being connected on piston 8, the inner side of plunger shaft 5 is respectively arranged with
Step 10, back-moving spring 20 is respectively arranged between the piston 8 and step 10 in plunger shaft 5.
Detent mechanism 4 is respectively arranged between the both sides of reversing valve core 3 and valve body 1, detent mechanism 1 includes being arranged on commutation
The positioning hole 41 of the upper surface of valve element 3, the section of positioning hole 41 are provided with upward isosceles trapezoid is held greatly on the inwall of valve body 1
Mounting groove 42, the locating piece 43 coordinated with positioning hole 41 is provided with mounting groove 42, is provided between locating piece 43 and bottom land 43
Spring 44.
When reversing valve core 3 is in left position, the locating piece 43 positioned at the detent mechanism 4 in left side coordinates in corresponding positioning hole
In 41;When reversing valve core 3 is in right position, coordinate positioned at the locating piece 43 of the detent mechanism 4 on right side in corresponding positioning hole 41
It is interior.
The annular groove 32 of first annular groove 31 and second in left and right arrangement is provided with reversing valve core 3, is provided with valve body 1
Pressure oil port 11, oil return opening 12, the first actuator port 13, the second actuator port 14, it is provided with valve body 1 and connects with pressure oil port 11
Logical pressure oil inlet passage 15, the first drainback passage 16 connected respectively with oil return opening 12 and the second drainback passage 17, with first
First work oil ducts 18 of the connection of actuator port 13, the second work oil ducts 19 connected with the second actuator port 14 and the first work
Make the first oil transportation channel 110 and the second work oil ducts 19 and left hand piston of the rodless cavity connection of oil duct 18 and right hand piston chamber 5
Second oil transportation channel 111 of the rodless cavity connection of chamber 5;
When reversing valve core 3 is in left position, pressure oil inlet passage 15 by the second annular groove 32 respectively with the second work oil ducts 19,
Second oil transportation channel 111 is connected, and the first work oil ducts 18 are connected by first annular groove 31 with the first drainback passage 16;Work as commutation
When valve element 3 is in right position, pressure oil inlet passage 15 is led to the first work oil ducts 18, the first oil transportation respectively by first annular groove 31
Road 110 is connected, and the second work oil ducts 19 are connected by the second annular groove 32 with the second drainback passage 16.
The course of work of the present invention:
When reversing valve core 3 is in the left side station shown in Fig. 4, hydraulic oil is from pressure oil port 11 successively through excess pressure oil inlet passage
15th, the second annular groove 32 enters the second work oil ducts 19, now hydraulic pressure oil two parts, most of to be flowed from the second actuator port 14
Go out, to action object output pressure or flow, and the sub-fraction of hydraulic oil flows into left hand piston by the second oil transportation channel 111
In the rodless cavity of chamber 5, piston 8 in left hand piston chamber 5 and the displacement to the right of piston rod 9 being connected on piston 8, and band is moved
Moved to right to valve element 3, until the locating piece 43 of the detent mechanism 4 on right side coordinates in corresponding positioning hole 41, while make left side fixed
Position mechanism 4 locating piece 43 overcome the pressure of spring 44 to bounce back in positioning hole 41, now the piston 8 in left hand piston chamber 5 with
And piston rod 9 just moves to its extreme right position and do not continue to move right, now the position of valve element 33 is switched to shown in Fig. 3
Right side station.
The right side station of reversing valve core 3 as shown in Figure 3 is to the left side Switch of working position shown in Fig. 4:Hydraulic oil is from pressure oil port
11 successively through excess pressure oil inlet passage 15, first annular groove 31 enter the first work oil ducts 18, now hydraulic pressure oil two parts,
Most of to be flowed out from the first actuator port 13, to action object output pressure or flow, and the sub-fraction of hydraulic oil passes through the
One oil transportation channel 110 is flowed into the rodless cavity of right hand piston chamber 5, piston 8 in right hand piston chamber 5 and is connected on piston 8
Piston rod 9 to left dislocation, and drive reversing valve core 3 to move to left, until the locating piece 43 of left positioner mechanism 4 coordinates corresponding
In positioning hole 41, while the locating piece 43 of right positioner mechanism 4 is set to overcome the pressure of spring 44 to bounce back in positioning hole 41, now
Piston 8 and piston rod 9 in right hand piston chamber 5 just move to its extreme right position and not continued to left movement, now
The position of valve element 33 switches to the right side station shown in Fig. 4.
So the present invention changes its position of reversing valve core 3 automatically in the presence of itself, makes reversing valve core 3 automatic reciprocating,
And then the output order of valve is set to send change automatically without manual operation.