CN112128158A

CN112128158A - Multifunctional reversing pneumatic valve

Info

Publication number: CN112128158A
Application number: CN202011058402.9A
Authority: CN
Inventors: 谢学山; 段全虎; 邵波; 黄强; 邸加国
Original assignee: Tai'an Juling Exploring Equipment Co ltd
Current assignee: Tai'an Juling Exploring Equipment Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2020-12-25
Anticipated expiration: 2040-09-30
Also published as: CN112128158B

Abstract

The invention discloses a multifunctional reversing pneumatic valve, which relates to the application field of pneumatic equipment and designs a reversing pneumatic valve with simple structure and multiple functions, wherein the reversing pneumatic valve not only has the air inlet and exhaust reversing functions of a common pneumatic reversing valve, but also has additional functions of overload protection, scram protection, air-break brake control and the like, an scram protection module and an overload protection module which are matched with the reversing pneumatic valve adopt independent modular structure design, a user can select one or two functional modules to be combined with a main body of the pneumatic reversing valve for application according to the requirement, the structure is simple, the use is convenient, the application range is wide, the user does not need to respectively design or purchase the reversing pneumatic valve with one function, the cost is greatly reduced, and the utilization rate of the pneumatic reversing valve is improved.

Description

Multifunctional reversing pneumatic valve

Technical Field

The invention relates to the application field of pneumatic equipment, in particular to a multifunctional reversing pneumatic valve.

Background

Because of the excellent explosion-proof performance of pneumatic components, pneumatic control and pneumatic machinery are widely applied to various aspects of production and life. The pneumatic actuating elements such as the cylinder, the pneumatic motor and the like are important power units of the pneumatic machine, a reversing valve in an operation system of the pneumatic actuating element plays a crucial role in the aspects of the operating efficiency and the safety of the pneumatic machine, a common reversing valve only has the functions of air inlet and exhaust reversing and flow control in a certain sense, the actual operation function is poor, and the safety protection function is not provided, so that the great potential safety hazard exists, for example, the release speed under load is not easy to control, misoperation and operation blocking are easy to cause danger, the overload is not limited, and the overtime operation is realized.

In addition, along with the improvement of social safety consciousness, the requirement on the operation safety of equipment is higher and higher, the trend of function diversification is more and more obvious, the purposes of products are different, the control requirement is also different, the modularized design is carried out on the function control of the reversing valve according to different working requirements, different safety control requirements are realized through the combination of functional modules, and the applicability of the product is improved, so that the inevitable trend is realized.

At present, from the safety perspective, there are also examples of integral reversing pneumatic valves with additional overload protection function or emergency stop protection function, but for multifunctional integral reversing pneumatic valves, the more the functions are, the more complicated the structure of the air passage of the reversing valve body is, the more the processing difficulty is, the valve body blank generally adopts the casting method, the casting blank is difficult to avoid the casting defects such as sand holes, air holes and the like, the reversing pneumatic valve with general functions only has the air intake and exhaust reversing function, some air cross and air leakage inside the reversing pneumatic valve body do not have great influence on the whole function, the multifunctional reversing valve body is different, the interior has the air cross and air leakage slightly, the realization of the logic action is influenced, the whole valve body is scrapped, and the integral multifunctional reversing pneumatic valve does not have the selectivity of the additional function, the user can not select the additional function of the reversing pneumatic valve according to the needs, and the valve bodies with various functions are designed, the product cost is high, and the large-scale production is not facilitated.

Disclosure of Invention

In order to solve the technical problems, the invention provides a multifunctional reversing pneumatic valve which can realize the functions of air inlet and exhaust reversing and flow control, main air source closing, reverse exhaust throttling and the like, an additional functional air passage of an overload protection module and an emergency stop protection module is designed and reserved, a special emergency stop protection module and an overload protection module are designed, and a control interface is reserved for an air-break braking device so as to selectively add the functions of overload protection and emergency stop protection and connect and control the braking and releasing of the air-break braking device, thereby greatly improving the applicability and the use safety of products.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a multifunctional reversing pneumatic valve comprises a valve body, an air supply valve core, a reversing valve core and an operating handle, wherein the air supply valve core is arranged in an upper cavity of the valve body, a main air supply valve opening air cavity is formed between the left end of the air supply valve core and the valve body, a main air passage and a main air passage form a non-fixed sealing relation through a sealing disc at the right end of the air supply valve core, the reversing valve core is arranged in a lower cavity of the valve body, a valve sleeve is pressed into the valve body in a press-fitting mode, the air passage of the valve sleeve and the air passage of the valve body form a fixed communication relation, the reversing valve core is arranged in the valve sleeve to form a rotatable small clearance fit, the air passage of the reversing valve core and the air passage of the valve sleeve form a variable communication relation, the operating handle is arranged at one side of the valve body, the reversing is realized by changing the rotating direction of the reversing valve core through the, the valve body is internally provided with an exhaust inner air passage, an opening inner air passage and a high-pressure inner air passage, the exhaust inner air passage is communicated with an exhaust cavity of the air supply valve core, the opening inner air passage is communicated with an opening air cavity of a main air supply valve, the high-pressure inner air passage is communicated with a lower air cavity of a functional valve in the valve body, the valve body is detachably connected with an emergency stop baffle, the emergency stop baffle is provided with an exhaust hole and an external interface communicated with the opening inner air passage, and the inner side surface of the emergency stop baffle is also provided with grooves respectively communicated with the exhaust inner air passage, the exhaust hole and the opening inner air passage and the high-; the valve body is internally provided with an overload signal inner air passage, a valve body inner air passage I and a valve body inner air passage II, the overload signal inner air passage and the valve body inner air passage I are arranged at the bottom of the valve body, the two valve body inner air passages are symmetrically arranged at two sides of the overload signal inner air passage and are respectively communicated with the valve body inner air passages at the left side and the right side of the valve body, the bottom of the valve body is detachably connected with an overload baffle plate to seal the overload signal inner air passage and the valve body inner air passage I, and an external port of the overload signal inner air passage is sealed; the external interface of the emergency stop baffle communicated with the opened internal air channel is connected with a brake air pipeline and is used for connecting an air control interface of an air cut-off brake device; the shaft end of the reversing valve core penetrates through a torsional spring to form fixed connection with an operating handle through a handle connecting piece, a middle position locking device is arranged on the operating handle, the torsional spring enables the operating handle to automatically return and lock in a middle position after rotating operation, the emergency stop baffle is detached and used for being connected with a pneumatic emergency stop protection module, the overload baffle is detached and used for being connected with an overload protection module, and the emergency stop protection module and the overload protection module can be connected or selected to be connected at the same time.

The middle position locking device comprises a sliding sleeve, a handle limiting rod, a first spring and a positioning groove in a reversing valve core end cover, the sliding sleeve is sleeved outside the operating handle, the operating rod of the operating handle is arranged to be in a sliding structure, the upper portion of the operating handle is connected with the sliding sleeve through the first spring, the handle limiting rod is arranged outside the sliding sleeve and is matched with the positioning groove in the reversing valve core end cover, when the operating handle is in an initial middle position, the handle limiting rod is clamped in the positioning groove to lift the sliding sleeve outside the operating handle, the handle limiting rod leaves the positioning groove, and the operating handle pushes and pulls the reversing valve core to rotate to achieve reversing.

The air supply valve core is arranged in an upper cavity of the valve body, a sealing disc, an air supply valve push plate and a pressure spring are sequentially arranged on a shaft head at the small end of the air supply valve core, and the pressure spring is sleeved on a circular boss of the air supply valve push plate.

The lower side of the main air supply channel of the valve body is provided with a functional valve, a steel ball, a sliding plug sealing assembly, a sliding rod, a sealing plug, a small spring, a spring seat and a hole stopper are sequentially arranged in the functional valve, a cavity formed between the sliding plug sealing assembly and the sealing plug is an air cavity, and process holes in the upper portion of the valve body functional valve and the top of the main air supply channel are sealed through process screw plugs.

The valve body, the valve sleeve and the reversing valve core are provided with a plurality of reserved function air passages on the other cross section, a left-right symmetrical valve body inner air passage third is arranged in the valve body lower cavity main body, a left-right symmetrical valve sleeve air passage is arranged in the valve sleeve, a left-right symmetrical valve core air passage is arranged in the reversing valve core, the valve sleeve air passages on the left side and the right side and the valve body inner air passage third are respectively communicated with the valve body inner air passage third in a corresponding and normally open mode, the valve sleeve air passages on the left side and the right side and the valve body inner air passage third are respectively communicated with an exhaust cavity of the reversing valve core through the corresponding valve core air passages under the non-operation state when the operating handle.

The emergency stop protection module comprises an emergency stop valve body, the emergency stop valve body is composed of an emergency stop component and a reset component, an emergency stop valve hole and a reset valve hole are respectively formed in the bottom of the emergency stop valve body and used for installing the emergency stop component and the reset component, and the bottoms of the emergency stop valve hole and the reset valve hole are respectively blocked; the emergency stop component comprises an emergency stop valve core, an emergency stop valve sleeve, an emergency stop screw cap, an emergency stop cap, a backstop pad, an emergency stop pressing cap and a second spring, the emergency stop valve sleeve is arranged in an emergency stop valve hole of the emergency stop valve body, the bottom end of the emergency stop valve sleeve is closely arranged on the plug, the emergency stop screw cap is screwed at the top end of the emergency stop valve sleeve, the emergency stop pressing cap is screwed at the upper part of the emergency stop screw cap, the backstop pad is arranged at the top of a large hole of the emergency stop pressing cap, the emergency stop valve core is arranged in the emergency stop valve sleeve, the top end of the emergency stop valve core penetrates through the emergency stop screw cap and the backstop pad, the top of the emergency stop valve core is screwed with the emergency stop cap, and the second spring is sleeved; the reset assembly comprises a reset valve core, a reset valve sleeve, a reset pressing cap, a reset cap and a positioning wave, the reset valve sleeve is arranged in a reset valve hole of the emergency stop valve body, the bottom end of the reset valve sleeve is closely adjacent to the reset pressing cap arranged on the plug, the top end of the reset valve sleeve is rotatably provided with the reset pressing cap, the reset valve core is arranged in the reset valve sleeve, and the top end of the reset valve core penetrates through the reset pressing cap and is rotatably provided with the reset cap.

The emergency stop valve sleeve and the reset valve sleeve are provided with air ring grooves outside the longitudinal cross air passage holes corresponding to the emergency stop valve body, holes are formed in the periphery of the groove bottom and communicated with the grooves in the sleeve, the adjacent external air ring grooves are sealed in a segmented mode, an inner groove is formed inside the longitudinal cross air passage holes corresponding to the emergency stop valve sleeve and the reset valve sleeve, and the groove edge of the inner groove is provided with a chamfer.

The overload protection valve comprises an overload protection valve body, an overload valve cover, an overload valve rod, an overload valve top plug, a spring III and an overload valve piston, wherein the overload valve cover is fixedly arranged at the bottom of the overload protection valve body, the overload valve rod is rotatably connected with the overload valve top plug, the bottom end of the overload valve rod penetrates through the overload valve cover and is arranged in a step mounting hole of the overload valve cover, the overload valve top plug is clamped in a transverse groove in the upper surface of the overload valve cover, the overload valve top plug moves upwards or downwards when the overload valve rod rotates, the overload valve piston is arranged at the top of an upper cavity of the overload protection valve body, above the overload valve top plug and the overload valve rod, the spring III is arranged between the overload valve piston and the overload valve top plug, the bottom end of the spring III is sleeved outside the overload valve top plug, the top end of the spring III is fixed on the bottom surface of the overload valve, The overload protection valve comprises an overload valve piston lower air cavity and an overload signal air cavity, wherein a fabrication hole communicated with the overload valve piston upper air cavity is formed in one side of the overload valve piston upper air cavity on the overload protection valve body and is blocked by an inner hexagon screw.

Set up piston radial seal circle and piston end face seal circle between overload valve piston and the overload protection valve body respectively, set up valve rod seal circle between overload valve rod and the overload valve gap, set up the combination and seal up between overload valve gap and the overload protection valve body, it seals up to set up the connection when overload protection valve body is connected with supporting main part.

The reversing pneumatic valve overcomes the defects of the existing reversing pneumatic valve, and is simple in structure and diverse in function, the reversing pneumatic valve not only has the air inlet and exhaust reversing functions of a common pneumatic reversing valve, but also has additional functions of overload protection, scram protection, air cut-off brake control and the like, the scram protection module and the overload protection module which are matched with the reversing pneumatic valve are designed in an independent modular structure, a user can select one or two functional modules to be combined with a pneumatic reversing valve main body for application according to needs, the reversing pneumatic valve is simple in structure, convenient to use and wide in application range, the user does not need to design or purchase the reversing pneumatic valve with one function respectively, the cost is greatly reduced, and the utilization rate of the pneumatic reversing valve is improved; the structure of the reversing pneumatic valve operating handle is improved, the misoperation of the operating handle is prevented, and the operation safety and the operation efficiency are improved; the overload protection module is connected with the matched main body through the upper air cavity of the overload valve piston, the lower air cavity of the overload valve piston and the overload signal air cavity, so that the overload protection function can be realized, and a user can freely select whether to use the overload protection module, so that the structure of the matched main body is greatly simplified, the multipurpose of the main body is realized, and the rejection rate is reduced; the emergency stop protection module can quickly close a main air source or start other corresponding emergency control systems under the emergency situation, and simultaneously implements braking of the air-cut braking device, thereby preventing safety accidents and improving the adaptability and the use safety of products.

Drawings

FIG. 1 is a schematic front cross-sectional view of a reversing pneumatic valve of the present invention;

FIG. 2 is a rear view of the reversing pneumatic valve of the present invention;

FIG. 3 is a left side view of the reversing pneumatic valve of the present invention;

FIG. 4 is a right side view of the reversing pneumatic valve of the present invention;

FIG. 5 is a schematic view of the reversing pneumatic valve scram baffle connection of the present invention;

FIG. 6 is a schematic elevational view in cross-section taken at the left of the operating handle of the reversing pneumatic valve of the present invention;

FIG. 7 is a rear view, in cross-section, of the reversing pneumatic valve operating handle of the present invention, shown rotated to the left;

FIG. 8 is a right side elevational view in cross-section of the operating handle of the reversing pneumatic valve of the present invention;

FIG. 9 is a rear elevational view, in right-hand section, of the operating handle of the reversing pneumatic valve of the present invention;

FIG. 10 is a schematic structural diagram of an emergency stop protection module according to the present invention;

FIG. 11 is a schematic diagram of the scram protection module of the present invention in a scram state;

FIG. 12 is a schematic diagram of the emergency stop protection module in a reset state according to the present invention;

FIG. 13 is a schematic view of the reversing pneumatic valve of the present invention in combination with an emergency stop protection module;

FIG. 14 is a schematic structural diagram of an overload protection module according to the present invention;

fig. 15 is a schematic cross-sectional view of an overload protection module in combination with a reversing pneumatic valve in accordance with the present invention.

Detailed Description

The invention is described in detail below with reference to the following figures and specific embodiments:

as shown in fig. 1-9, the multifunctional reversing pneumatic valve comprises a valve body 1, an air supply valve core 2, a reversing valve core 3 and an operating handle 4, wherein the air supply valve core 2 is arranged in an upper cavity of the valve body 1, a main air supply valve opening air cavity 11 is formed between the left end of the air supply valve core 2 and the valve body 1, a main air channel 25 and a main air channel 12 form a non-fixed sealing relationship through a sealing disc 21 at the right end, the reversing valve core 3 is arranged in a lower cavity of the valve body 1, the valve sleeve 5 is pressed into the valve body 1 in a press-fitting manner, the air channel of the valve sleeve 5 and the air channel of the valve body 1 form a fixed communicating relationship, the reversing valve core 3 is arranged in the valve sleeve 5 to form a rotatable small clearance fit, the air channel of the reversing valve core 3 and the air channel of the valve sleeve 5 form a variable communicating relationship, the operating handle 4 is arranged at one, the emergency stop valve comprises a valve body 1, wherein an additional function air passage used for connecting an overload protection module and an emergency stop protection module and a control interface used for connecting an air-break braking device are arranged on the valve body 1, an exhaust inner air passage 13, an opening inner air passage 15 and a high-pressure inner air passage 16 are arranged in the valve body 1, the exhaust inner air passage 13 is communicated with an exhaust cavity 10 of an air supply valve core 2, the opening inner air passage 15 is communicated with a main air supply valve opening air cavity 11, the high-pressure inner air passage 16 is communicated with a lower air cavity 39 of a function valve in the valve body 1, an emergency stop baffle 6 is detachably connected to the valve body 1, an exhaust hole 14 is formed in the inner side surface of the emergency stop baffle 6, and grooves respectively communicated with the exhaust inner air passage 13 and the exhaust hole 14 and the; an overload signal inner air passage 17, a valve body inner air passage one 18 and a valve body inner air passage two 19 are arranged in the valve body 1, the overload signal inner air passage 17 and the valve body inner air passage one 18 are arranged at the bottom of the valve body 1, the two valve body inner air passages one 18 are symmetrically arranged at two sides of the overload signal inner air passage 17 and are respectively communicated with the valve body inner air passages two 19 at the left side and the right side of the valve body 1, the bottom of the valve body 1 is detachably connected with an overload baffle 7 to seal the overload signal inner air passage 17 and the valve body inner air passage one 18, and an external port of the overload signal inner air passage 17 is sealed; the external interface of the emergency stop baffle 6 communicated with the opening internal air passage 15 is connected with a brake air pipeline 8 for connecting an air control interface of an air-break brake device; the shaft end of the reversing valve core 3 penetrates through a torsion spring 45 to form fixed connection with an operating handle 4 through a handle connecting piece 46, a middle position locking device is arranged on the operating handle 4, the torsion spring 45 enables the operating handle 4 to automatically return and lock at the middle position after rotating operation, the emergency stop baffle 6 is detached and used for being connected with a pneumatic emergency stop protection module, the overload baffle 7 is detached and used for being connected with an overload protection module, and the emergency stop protection module and the overload protection module can be connected or selected to be connected at the same time.

As a preferable mode, in this embodiment, the middle position locking device includes a sliding sleeve 41, a handle limiting rod 42, a first spring 43, and a positioning groove 44 on the end cover of the reversing valve core, the sliding sleeve 41 is sleeved outside the operating handle 4, the operating rod of the operating handle 4 is set to be a slidable structure, and the upper portion of the operating rod is connected to the sliding sleeve 41 through the first spring 43, the handle limiting rod 42 is disposed outside the sliding sleeve 41 and is adapted to the positioning groove 44 on the end cover of the reversing valve core, when the operating handle 4 is in the initial middle position, the handle limiting rod 42 is clamped in the positioning groove 44 to lift the sliding sleeve 41 outside the operating handle 4, the handle limiting rod 42 leaves the positioning groove 44, and the operating handle 4 is pushed and pulled to rotate the reversing valve core 3 to achieve reversing. If the sliding sleeve 41 is not lifted, the operating handle assembly cannot deflect even if being touched accidentally, so that misoperation can be prevented, and the operation safety is ensured.

In a preferred mode, the deflection angle of the operating handle 4 is set to 0 to ± 45 ° in the present embodiment, and this is achieved by a mechanical structure provided on the end cap of the direction valve to limit the deflection angle of the handle, and this is not described in detail herein because the mechanical structure of this function is simple.

Preferably, in this embodiment, the air supply valve core 2 is installed in the upper cavity of the valve body 1, a sealing disc 21, an air supply valve push plate 22 and a compression spring 23 are sequentially arranged on a shaft head at the small end of the air supply valve core 2, and the compression spring 23 is sleeved on a circular boss of the air supply valve push plate 22.

Preferably, in this embodiment, a functional valve is disposed below the main gas supply channel 12 of the valve body 1, the functional valve is sequentially provided with a steel ball 31, a sliding plug sealing assembly 32, a sliding rod 35, a sealing plug 36, a small spring 37, a spring seat 33 and a hole stopper 38, a cavity formed between the sliding plug sealing assembly 32 and the sealing plug 36 is the lower gas cavity 39, and a process hole above the valve body functional valve and at the top of the main gas supply channel 12 is sealed by a process screw plug 111.

As a preferable mode, in this embodiment, a plurality of reserved function air passages are arranged on another cross section in the valve body 1, the valve sleeve 5 and the reversing valve core 3, a left-right symmetrical valve body inner air passage three 110 is arranged in the lower cavity main body of the valve body 1, a left-right symmetrical valve sleeve air passage 51 is arranged in the valve sleeve 5, a left-right symmetrical valve core air passage 310 is arranged in the reversing valve core 3, the valve sleeve air passages 51 and the valve body inner air passage three 110 on the left and right sides are respectively and normally communicated with each other, and in a non-operation state when the operating handle 4 is at a middle position, the valve sleeve air passages 51 and the valve body inner air passage three 110 on the left and right sides are respectively communicated with the exhaust cavity 311 of the reversing valve core 3 through the corresponding valve core air passages 310, and the valve body.

In this embodiment, the exhaust passage of the reversing valve element 3 is configured to be a symmetrical special-shaped structure, the forward exhaust passage is a large-wide hole structure, and the reverse exhaust passage is a small-diameter porous structure, so as to increase exhaust damping during reverse operation, effectively control the reverse operating speed under a load condition, and ensure operation safety.

As shown in fig. 10-13, the emergency stop protection module includes an emergency stop valve body 61, the emergency stop valve body 61 is configured to be composed of two components, namely, an emergency stop component and a reset component, the bottom of the emergency stop valve body 61 is respectively provided with an emergency stop valve hole 611 and a reset valve hole 612 for installing the emergency stop component and the reset component, and the bottoms of the emergency stop valve hole 611 and the reset valve hole 612 are respectively sealed by a plug 613; the scram assembly comprises a scram valve core 621, a scram valve sleeve 622, a scram nut 623, a scram cap 624, a stopping pad 625, a scram pressing cap 626 and a spring II 627, wherein the scram valve sleeve 622 is arranged in a scram valve hole 611 of the scram valve body 61, the bottom end of the scram valve sleeve 622 is closely adjacent to a plug 613, the scram nut 623 is screwed on the top end of the scram valve sleeve 622, the scram pressing cap 626 is screwed on the upper portion of the scram nut 623, the stopping pad 625 is arranged on the top of a large hole of the scram pressing cap 626, the scram valve core 621 is arranged in the scram valve sleeve 622, the top end of the scram valve core passes through the scram nut 623 and the stopping pad 625, the top of the scram cap 624 is screwed on the top portion, and the spring II 627 is sleeved on the portion, between the inner hole step; the reset assembly includes a reset valve core 631, a reset valve sleeve 632, a reset pressure cap 633, a reset cap 634 and a positioning wave element 635, the reset valve sleeve 632 is disposed in the reset valve hole 612 of the scram valve body 61, the bottom end of the reset valve sleeve 632 is closely adjacent to the plug 613, the top end of the reset valve sleeve is screwed with the reset pressure cap 633, the reset valve core 631 is disposed in the reset valve sleeve 632, and the top end of the reset valve core passes through the reset pressure cap 633 and is screwed with the reset cap 634.

Preferably, in this embodiment, the scram valve sleeve 622 and the reset valve sleeve 632 are both provided with air ring grooves outside the longitudinal cross air passage holes corresponding to the scram valve body 61, and holes are drilled on the circumference of the groove bottom to communicate with the inside of the sleeve, and the adjacent external air ring grooves are sealed in a segmented manner, and the corresponding longitudinal cross air passage holes of the scram valve sleeve 622 and the reset valve sleeve 632 are provided with internal grooves, and the edges of the internal grooves are provided with chamfers to ensure that the sealing rings are not damaged when the respective valve cores move.

As shown in fig. 14-15, the overload protection module includes an overload protection valve body 71, an overload valve cover 72, an overload valve stem 75, an overload valve top plug 78, a spring tri 711 and an overload valve piston 713, the overload valve cover 72 is fixedly disposed at the bottom of the overload protection valve body 71, the overload valve stem 75 is rotatably connected to the overload valve top plug 78, the bottom end of the overload valve stem 75 passes through the overload valve cover 72 and is disposed in a stepped mounting hole of the overload valve cover 72, the overload valve top plug 78 is clamped in a transverse groove on the upper surface of the overload valve cover 72, when the overload valve stem 75 is rotated, the overload valve top plug 78 moves up or down, the overload valve piston 713 is disposed at the top of an upper chamber of the overload protection valve body 71, above the overload valve top plug 78 and the overload valve stem 75, the spring tri 711 is disposed between the overload valve piston 713 and the overload valve top plug 78, and the bottom end of the spring tri, The top end of the overload protection valve body 71 is fixed on the bottom surface of the overload valve piston 713 and sleeved outside the overload valve rod 75, the overload protection valve body 71 is provided with an overload valve piston upper air cavity 715, an overload valve piston lower air cavity 717 and an overload signal air cavity 716, and one side of the overload valve piston upper air cavity 715 on the overload protection valve body 71 is provided with a fabrication hole communicated with the overload valve piston upper air cavity 715 and blocked by an inner hexagon screw 718.

Preferably, in this embodiment, a piston radial seal 79 and a piston end face seal 710 are respectively disposed between the overload valve piston 713 and the overload protection valve body 71, a valve rod seal 77 is disposed between the overload valve rod 75 and the overload valve cover 72, a combined seal 76 is disposed between the overload valve cover 72 and the overload protection valve body 71, and a connecting seal 712 is disposed when the overload protection valve body 71 is connected to the mating body 714.

The specific principle and the operation process of the reversing pneumatic valve are as follows:

the ball head of the operating handle 4 is held by hand to pull up the sliding sleeve 41, the operating handle 4 is pushed or pulled to drive the reversing valve core 3 to rotate, the steel ball 31 is pushed to drive the sliding plug sealing component 32, the sliding rod 35 and the sealing plug 36 to move upwards, compressed gas in the main gas supply channel 12 enters the lower gas cavity 39, then the compressed gas passes through the high-pressure inner gas channel 16 and the groove of the emergency stop baffle 6 and reaches the main gas supply valve opening gas cavity 11 through the opening inner gas channel 15, the air supply valve core 2 is pushed to move rightwards after overcoming the pressure of the compressed gas at the right end and the pressure spring 23, the sealing disc 21 is separated from the sealing surface of the valve body 1, the main gas supply valve is opened, the compressed gas in the main gas supply channel 12 enters the main gas channel 25.

The operating handle 4 is pushed or pulled on the other matching layer of the reversing valve core 3, the valve sleeve 5 and the valve body 1, one of the three gas passages 110 in the valve body is communicated with the main gas passage 25 through the valve sleeve gas passage 51, the other three gas passages 110 in the valve body is communicated with the reversing valve core exhaust cavity 9 through the other one of the valve sleeve gas passage 51 and the valve core gas passage 310, that is, the operating handle 4 is pushed or pulled, one of the three gas passages 110 in the valve body is provided with high-pressure gas, and the other gas passages are in an exhaust state, so that the related function control can be realized, and the two three gas passages 110 in the valve body can be blocked when not needed.

The operating handle 4 is loosened, under the action of the elasticity of the torsion spring 45, the handle connecting piece 46 drives the operating handle 4 and the reversing valve core 3 to return to the middle position and be locked, the steel ball 31 falls back, under the action of the elasticity of the small spring 37, the sliding rod 35 and the sealing plug 36 move downwards to block the main air supply cavity 12 from the lower air cavity 39, at the moment, compressed air in the lower air cavity 39 can push the sliding plug sealing assembly 32 to move downwards to enable the sliding plug sealing assembly 32 to be separated from the sliding rod 35, the compressed air in the lower air cavity 39 enters the exhaust cavity 311 of the reversing valve core 3 through the middle hole of the sliding plug sealing assembly 32 and the two small air holes in the pit of the reversing valve core 3 below the steel ball 31 to be decompressed, so that the main air supply valve communicated with the opening internal air passage 15 opens the air cavity 11 and air in the brake pipeline 8 to release pressure, the air brake device performs braking, the air supply valve core 2 moves back under the action of the elasticity of the compression, the main air passage 25 is isolated from the main air supply chamber 12, and air supply is stopped, and the pneumatic actuator stops operating.

This novel pneumatic valve body's of switching-over design, under the prerequisite of guaranteeing self corresponding function realization, reserved overload protection control air flue, scram protection control air flue and other logic function control air flues, make it can attach overload protection module, can attach scram protection module, also can attach overload protection and scram protection bimodulus and other logic function control module, for the expansion of safety protection function provides the condition, for the free choice of user to the product function provides convenience and possibility, and the land has improved the suitability of product.

The overload protection module on the valve body 1 and the additional function air passage of the emergency stop protection module, the control interface for connecting the air-break brake device, the related connection mode and the size are all designed according to the actual structure of the module, when a certain functional module is required to be added, the baffle plate is detached, the module is installed, and the safety protection function of the module can be realized by performing related air passage connection according to the control principle.

The scram protection module valve body and the motion valve core adopt an embedded sleeve isolation structure, specifically, the scram valve body 61, the scram valve core 621 and the reset valve core 631 are separated by a scram valve sleeve 622 and a reset valve sleeve 632, a static sealing mode that a valve sleeve outer diameter annular groove is arranged and a sealing ring is arranged in a valve body hole is adopted, sealing among all stage holes among the scram valve body 61, the scram valve sleeve 622 and the reset valve sleeve 632 is realized, the scram valve sleeve 622 and the reset valve sleeve 632 are respectively arranged at the corresponding longitudinal cross air passage hole position of the scram valve body 61, inner and outer grooves and groove periphery holes are punched to realize fixed communication of a valve body air passage and a valve core inner hole, and groove edges of the valve sleeve are chamfered When the reset valve sleeve 632 is provided with the sealing ring to move, the valve body assembly is not damaged by shearing, the good air tightness of each part of the valve body assembly is ensured, the reliability of the product is improved, the processing cost is greatly reduced, and the large-scale production and popularization are facilitated.

As shown in fig. 13, which is a schematic diagram of the connection between the emergency stop protection module and the reversing pneumatic valve, in a normal state, the emergency stop first inner air passage 6272 of the emergency stop protection module is communicated with the emergency stop second inner air passage 6271, and then is communicated with the reset first inner air passage 6365, the reset second inner air passage 6363, and the reset first external air passage 6364 (as shown in fig. 10), when an operation handle of the pneumatic valve is pushed and pulled, compressed air enters the main air supply opening air chamber 11 of the reversing pneumatic valve through the emergency stop first inner air passage 6272, the emergency stop second inner air passage 6271, the reset first inner air passage 6365, the reset second inner air passage 6363 to the reset first external air passage 6364, and enters the main valve opening air chamber 11 of the main air supply pneumatic valve, the compressed air enters the main air supply passage 12 of the reversing pneumatic valve through the main air supply passage, the air supply system of the apparatus is supplied with air through the reversing valve core 3 of the reversing pneumatic valve, and simultaneously, the air cut-off brake device of, and normal operation and control of the equipment are realized.

As shown in fig. 11, when an emergency occurs and the operation of the equipment needs to be stopped but the equipment cannot be operated in time, the emergency stop cap 624 can be pressed, the emergency stop valve core 621 moves downwards, at this time, the emergency stop inner air passage one 6272 is communicated with the emergency stop inner air passage three 6273, compressed air in the emergency stop inner air passage one 6272 enters the reset inner air passage four 6366 through the emergency stop inner air passage three 6273, so that the reset valve core 631 moves upwards, the reset valve core 635 clamps the reset valve core 631 at the upper end position, the reset outer air passage one 6364 is communicated with the atmosphere through the reset inner air passage two 6363, the reset inner air passage three 6362 and the reset outer air passage two 6361, the main air inlet valve of the reversing pneumatic valve is closed under the action of the spring force to interrupt air supply, and the air-break braking device is unloaded to perform braking, so that the.

As shown in fig. 12, after the sudden stop valve 621 bounces under the elastic force of the second spring 627, because the reset valve 631 is positioned and the wave 635 is clamped at the upper end ring groove of the reset valve housing 632, the reset external air passage one 6364 is always communicated with the atmosphere, so that the main air intake valve is always in a closed state, even if the operating handle of the reversing pneumatic valve is in an operating state at this time, the compressed air in the sudden stop internal air passage one 6272 can only enter the lower portion of the reset valve housing 632 through the sudden stop internal air passage two 6271 and the reset internal air passage one 6365, and the reset valve 631 is held at the upper end of the reset valve housing 632, and the reversing pneumatic valve is in an operating failure state, and only when the emergency situation is relieved, the reset cap 634 is pressed down forcibly, so that the reset valve 631 can perform normal operation after being reset.

The emergency stop protection module designs a smart emergency stop and reset structure according to the emergency stop reset principle, so that the module control is safer; the wave ring groove positioning mode of the reset valve core ensures that the reset operation has proper force performance and is not easy to reset due to misoperation caused by mistaken collision and the like; the realization of the control function cannot be influenced after the emergency stop valve core is automatically reset by spring force, so that the out-of-control operation of the emergency stop valve core of the original self-locking structure caused by misoperation or mechanical failure is avoided; the structure design of the emergency stop valve core and the reset valve core for limiting up and down and blocking the position of the setting valve sleeve ensures that the maximum of the communication area of the air passage is guaranteed, the transmission of functional pneumatic signals is quicker, and the functional action is more sensitive. The emergency stop protection module can also be applied to other pneumatic control systems needing emergency stop protection through methods such as other structural transition connection and the like.

In the actual installation process of the overload protection module, annular grooves for placing corresponding sealing elements are formed in the outsides of the overload valve piston 713 and the overload valve rod 75, the overload valve cover 72 and the overload protection valve body 71 are fixedly connected through a combined screw 74, and when the overload protection module is connected with a corresponding matched main body, the overload protection module is fixedly connected through a connecting screw 73. The overload valve stem 75 is mounted in a stepped hole of the overload valve cover 72, so that the overload valve stem cannot move axially, the overload valve top plug 78 is clamped in a transverse groove of the overload valve cover 72 and cannot rotate, and the overload valve top plug 78 can be driven to move upwards or downwards by rotating the overload valve stem 75 so as to adjust the pressure of the spring 711 on the overload valve piston 713, thereby adjusting the overload load within a certain range.

Referring to fig. 15, which is a schematic view of the connection between the overload protection module and the switching pneumatic valve, first, the overload piston valve upper air chamber 715 is communicated with the high pressure chamber during the operation of the load, the overload valve piston valve lower air chamber 717 is communicated with the exhaust chamber during the operation of the load, and the overload signal air chamber 716 is connected with the control air path for controlling the connection and disconnection of the main air supply line of the switching pneumatic valve.

When the operating handle of the reversing pneumatic valve is pulled to enable the motor to work under a forward load (mechanical lifting, traction and the like), an exhaust channel of the pneumatic motor is communicated with an overload valve piston lower air cavity 717 of the overload protection module, an air inlet channel of the pneumatic motor is communicated with an overload valve piston upper air cavity 715 of the overload protection module, a valve rod sealing ring 77 and a piston radial sealing ring 79 enable the piston lower air cavity to form a closed space, due to the fact that the effective area of the upper air cavity of the overload valve piston 713 is small, under the combined action of the pneumatic motor exhaust back pressure and a spring 711, a piston end face sealing ring 710 on an overload valve top plug 78 is tightly attached to the conical surface of the overload protection valve body 71, the overload valve piston upper air cavity 715 cannot be communicated with the overload signal air cavity 716, and the pneumatic motor can work normally within a. When the load of the pneumatic motor is increased, the pressure of the air inlet channel is increased due to the increase of the resistance, when the pressure born by the upper cavity of the overload valve piston 713 is larger than the sum of the exhaust back pressure of the lower cavity of the overload valve piston 713 and the force generated by the spring III 711, the overload piston 713 descends, the upper cavity 715 of the overload valve piston is communicated with the overload signal air cavity 716, a high-pressure gas signal is transmitted to a corresponding control air channel of an emergency stop protection module or other control systems, a main air inlet valve is closed or a corresponding emergency program is started, the pneumatic motor stops working, and normal operation can be performed again only after the overload situation disappears and is started and recovered, so that the pneumatic motor is controlled to work normally.

When the operating handle of the reversing pneumatic valve is pushed to enable the pneumatic motor to work reversely without load (mechanical implementation lowering, releasing and the like), an exhaust channel of the pneumatic motor is communicated with an upper air cavity 715 of the overload valve piston, an air inlet channel of the pneumatic motor is communicated with a lower air cavity 717 of the overload valve piston, the thrust of the lower air cavity 713 of the overload valve piston is larger than that of the upper air cavity 713 of the overload valve piston, the upper air cavity 715 of the overload valve piston 713 cannot be communicated with an overload signal air cavity 716 all the time, and the pneumatic motor can work normally.

The overload valve cover 72 is matched with the overload valve top plug 78 in a wedge type mode, when the square rod head of the overload valve rod 75 rotates, the overload valve top plug 78 cannot rotate in the wedge groove of the overload valve cover 72, and can move up and down through the lifting or pulling action of the overload valve rod thread to compress or release the spring III 711, so that the effect of increasing or reducing the pressure on the overload valve piston 713 is achieved, and the overload protection module has the function of adjusting overload load within a certain range.

The overload protection valve body 71, the overload valve piston 713 and the piston end face sealing ring 710 form conical surface sealing, unreliable factors such as shearing and excessive deformation of the sealing ring and displacement of the sealing ring caused by small end face plane sealing are avoided, and the service life of the sealing ring and the sealing reliability are greatly improved.

In the embodiment, the connection size of the overload protection module is designed according to the relevant connection size of the reversing pneumatic valve applied to the overload protection module, so that the overload protection module is convenient to assemble and install, and can be applied to other pneumatic control systems needing load limitation through methods such as transition connection or structure enlargement or structure reduction according to actual requirements.

When the overload protection module is not needed to be installed, channels such as the upper air cavity 715 of the overload valve piston, the overload signal air cavity 716 and the lower air cavity 717 of the overload valve piston are only needed to be closed, other functions of an operation system are not affected, the selection space of a user for product functions is greatly expanded, and the applicability of products is improved.

The emergency stop protection module and the overload protection module are simple in structure and convenient to install, and due to the pre-assembled structural design, the installation, debugging, maintenance and repair procedures of the reversing pneumatic valve functional module are simplified, the reversing pneumatic valve product is greatly convenient to produce and a user can replace and repair the service, and the reliability of the module assembling quality is guaranteed.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.

Claims

1. The utility model provides a multi-functional switching-over pneumatic valve, its characterized in that includes valve body (1), air feed case (2), switching-over case (3) and operating handle (4), air feed case (2) sets up in the epicoele of valve body (1), form main air feed valve between air feed case (2) left end and the valve body (1) and open air chamber (11), the right-hand member makes main gas duct (25) and main gas supply channel (12) form non-fixed sealed relation through sealed dish (21), switching-over case (3) sets up in the cavity of resorption of valve body (1), valve barrel (5) are impressed in valve body (1) with the pressure equipment mode, valve barrel (5) air duct and valve body (1) air duct form fixed intercommunicating relation, switching-over case (3) are packed into valve barrel (5), form rotatable little clearance fit, switching-over case (3) and valve barrel (5) air duct form variable intercommunicating relation, the operating handle (4) is arranged on one side of the valve body (1), the rotating direction of the reversing valve core (3) is changed through pushing and pulling of the operating handle (4) to realize reversing, the valve body (1) is provided with an additional function air passage for connecting an overload protection module and an emergency stop protection module and a control interface for connecting an air-break braking device, an exhaust inner air passage (13), an opening inner air passage (15) and a high-pressure inner air passage (16) are arranged in the valve body (1), the exhaust inner air passage (13) is communicated with an exhaust cavity (10) of the air supply valve core (2), the opening inner air passage (15) is communicated with an opening air cavity (11) of a main air supply valve, the high-pressure inner air passage (16) is communicated with a lower air cavity (39) of the function valve in the valve body (1), an emergency stop baffle (6) is detachably connected to the valve body (1), the emergency stop baffle (6) is provided with an exhaust hole (14) and an external interface communicated with the opening inner air, the inner side surface is also provided with grooves which are respectively communicated with the exhaust inner air passage (13) and the exhaust hole (14) and are communicated with the opening inner air passage (15) and the high-pressure inner air passage (16); the overload signal inner air passage (17), the valve body inner air passage I (18) and the valve body inner air passage II (19) are arranged in the valve body (1), the overload signal inner air passage (17) and the valve body inner air passage I (18) are arranged at the bottom of the valve body (1), the valve body inner air passages I (18) are symmetrically arranged at two sides of the overload signal inner air passage (17) and are respectively communicated with the valve body inner air passage II (19) at the left side and the right side of the valve body (1), the bottom of the valve body (1) is detachably connected with an overload baffle (7) to plug the overload signal inner air passage (17) and the valve body inner air passage I (18), and an external port of the overload signal inner air passage (17) is plugged; an external interface of the emergency stop baffle (6) communicated with the opening inner air passage (15) is connected with a brake air pipeline (8) and is used for connecting an air control interface of an air-break brake device; the shaft end of the reversing valve core (3) penetrates through a torsion spring (45) to form fixed connection with an operating handle (4) through a handle connecting piece (46), a middle position locking device is arranged on the operating handle (4), the torsion spring (45) enables the operating handle (4) to automatically return and lock in the middle position after rotating operation, the emergency stop baffle (6) is used for being connected with a pneumatic emergency stop protection module, the overload baffle (7) is used for being connected with an overload protection module, and the emergency stop protection module and the overload protection module can be simultaneously connected or selected to be connected.

2. The novel reversing pneumatic valve according to claim 1, wherein the neutral locking device comprises a sliding sleeve (41), a handle limiting rod (42), a first spring (43), and a positioning groove (44) on a reversing valve core end cover, the sliding sleeve (41) is sleeved outside the operating handle (4), the operating rod of the operating handle (4) is arranged in a slidable structure, the upper portion of the operating rod is connected with the sliding sleeve (41) through the first spring (43), the handle limiting rod (42) is arranged outside the sliding sleeve (41) and is matched with the positioning groove (44) on the reversing valve core end cover, when the operating handle (4) is in an initial neutral position, the handle limiting rod (42) is clamped in the positioning groove (44), the sliding sleeve (41) outside the operating handle (4) is lifted, and the handle limiting rod (42) leaves the positioning groove (44), the operating handle (4) is pushed and pulled to rotate the reversing valve core (3) to realize reversing.

3. The novel reversing pneumatic valve according to claim 1, wherein the air supply valve core (2) is installed in an upper cavity of the valve body (1), a sealing disc (21), an air supply valve push plate (22) and a pressure spring (23) are sequentially arranged on a shaft head at the small end of the air supply valve core (2), and the pressure spring (23) is sleeved on a circular boss of the air supply valve push plate (22).

4. The novel reversing pneumatic valve according to claim 1, wherein a functional valve is arranged below the main air supply channel (12) of the valve body (1), a steel ball (31), a sliding plug sealing assembly (32), a sliding rod (35), a sealing plug (36), a small spring (37), a spring seat (33) and a hole stopper (38) are sequentially arranged in the functional valve, a cavity formed between the sliding plug sealing assembly (32) and the sealing plug (36) is the lower air cavity (39), and a process hole above the valve body functional valve and at the top of the main air supply channel (12) is sealed by a process screw plug (111).

5. A new reversing pneumatic valve according to claim 1, characterised in that the other cross-section inside the valve body (1), valve sleeve (5) and reversing valve core (3) is provided with a plurality of pre-functional air passages, a left-right symmetrical valve body inner air channel III (110) is arranged in the lower cavity main body of the valve body (1), the valve sleeve (5) is internally provided with a valve sleeve air passage (51) which is bilaterally symmetrical, the reversing valve core (3) is internally provided with a valve core air passage (310) which is bilaterally symmetrical, the valve sleeve air passages (51) positioned at the left and right sides and a third air passage (110) in the valve body are respectively and normally communicated, and under the non-operation state when the operating handle (4) is in the middle position, the valve sleeve air passages (51) and the valve body inner air passage III (110) which are positioned at the left side and the right side are respectively communicated with an exhaust cavity (311) of the reversing valve core (3) through the corresponding valve core air passages (310), and the valve body inner air passage III (110) can be blocked when no control function is required.

6. The multifunctional reversing pneumatic valve according to claim 1, wherein the emergency stop protection module comprises an emergency stop valve body (61), the emergency stop valve body (61) is configured to be composed of an emergency stop component and a reset component, an emergency stop valve hole (611) and a reset valve hole (612) are respectively formed in the bottom of the emergency stop valve body (61) and used for installing the emergency stop component and the reset component, and the bottoms of the emergency stop valve hole (611) and the reset valve hole (612) are respectively blocked by a blocking plug (613); the emergency stop component comprises an emergency stop valve core (621), an emergency stop valve sleeve (622), an emergency stop screw cap (623), an emergency stop cover cap (624), a retaining pad (625), an emergency stop pressure cap (626) and a second spring (627), the emergency stop valve sleeve (622) is arranged in an emergency stop valve hole (611) of the emergency stop valve body (61), the bottom end of the emergency stop valve sleeve (622) is closely arranged on the plug (613), the top end of the emergency stop valve sleeve is screwed with an emergency stop screw cap (623), the upper part of the emergency stop screw cap (623) is rotatably provided with an emergency stop pressure cap (626), the top of a large hole of the emergency stop pressure cap (626) is provided with a backstop pad (625), the emergency stop valve core (621) is arranged in an emergency stop valve sleeve (622), the top of the emergency stop cap passes through the emergency stop screw cap (623) and the backstop pad (625), the emergency stop cap (624) is screwed on the top, a second spring (627) is sleeved on the part, between the inner hole step of the emergency stop nut (623) and the retaining pad (625), of the emergency stop valve core (621); the reset assembly includes reset case (631), reset valve barrel (632), resets and presses cap (633), resets and cover cap (634) and location ripples son (635), reset valve barrel (632) sets up in reset valve hole (612) of scram valve body (61), the bottom of reset valve barrel (632) is close to set up on blockking up (613), the top is adorned soon and is reset and press cap (633), reset case (631) sets up in reset valve barrel (632), and its top is passed and is reset and press cap (633) and adorn soon and reset cap (634).

7. The multifunctional reversing pneumatic valve as claimed in claim 6, wherein the scram valve sleeve (622) and the reset valve sleeve (632) are both provided with air ring grooves outside the corresponding longitudinal cross air passage holes of the scram valve body (61) and communicated with the sleeve by punching holes on the periphery of the groove bottom, the adjacent external air ring grooves are sealed in a segmented mode, the scram valve sleeve (622) and the reset valve sleeve (632) are provided with internal grooves inside the corresponding longitudinal cross air passage holes, and the edges of the internal grooves are provided with chamfers.

8. The multifunctional reversing pneumatic valve according to claim 1, wherein the overload protection module comprises an overload protection valve body (71), an overload valve cover (72), an overload valve rod (75), an overload valve top plug (78), a spring III (711) and an overload valve piston (713), the overload valve cover (72) is fixedly arranged at the bottom of the overload protection valve body (71), the overload valve rod (75) is rotatably connected with the overload valve top plug (78) and the bottom end of the overload valve rod penetrates through the overload valve cover (72) to be arranged in a stepped mounting hole of the overload valve cover (72), the overload valve top plug (78) is clamped in a transverse groove in the upper surface of the overload valve cover (72), the overload valve top plug (78) moves upwards or downwards when the overload valve rod (75) is rotated, and the overload valve piston (713) is arranged at the top of an upper cavity of the overload protection valve body (71), The overload valve comprises an overload valve top plug (78) and an overload valve rod (75), a spring III (711) is arranged between an overload valve piston (713) and the overload valve top plug (78), the bottom end of the spring III (711) is sleeved outside the overload valve top plug (78), the top end of the spring III (711) is fixed on the bottom surface of the overload valve piston (713), and the spring III (711) is sleeved outside the overload valve rod (75), an overload protection valve body (71) is provided with an overload valve piston upper air cavity (715), an overload valve piston lower air cavity (717) and an overload signal air cavity (716), and one side of the overload valve upper piston air cavity (715) on the overload protection valve body (71) is provided with a process hole communicated with the overload valve upper air cavity (715) and is blocked by an inner hexagonal screw (.

9. The multifunctional reversing pneumatic valve according to claim 8, wherein a piston radial seal ring (79) and a piston end face seal ring (710) are respectively arranged between the overload valve piston (713) and the overload protection valve body (71), a valve rod seal ring (77) is arranged between the overload valve rod (75) and the overload valve cover (72), a combined seal gasket (76) is arranged between the overload valve cover (72) and the overload protection valve body (71), and a connecting seal gasket (712) is arranged when the overload protection valve body (71) is connected with a matching main body (714).