CN115727157A - Novel reversing valve and precise pneumatic adjusting device comprising same - Google Patents
Novel reversing valve and precise pneumatic adjusting device comprising same Download PDFInfo
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- CN115727157A CN115727157A CN202211585143.4A CN202211585143A CN115727157A CN 115727157 A CN115727157 A CN 115727157A CN 202211585143 A CN202211585143 A CN 202211585143A CN 115727157 A CN115727157 A CN 115727157A
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Abstract
The invention provides a novel reversing valve and a precise pneumatic adjusting device comprising the same, wherein the novel reversing valve comprises a valve core, a shell structure and an elastic piece; the shell structure is internally provided with a first sealing cavity, a second sealing cavity and a third sealing cavity which are communicated with each other, the first sealing cavity is provided with a first gas input channel and a second gas input channel, and the third sealing cavity is provided with a plurality of gas output channels; the valve core is arranged in the shell structure and comprises an air pressure part, a connecting part and a working part, the air pressure part divides the first sealed cavity into an air source cavity and an elastic part cavity, the connecting part is connected with the second sealed cavity, and the working part extends into the third sealed cavity; the elastic piece is arranged in the elastic piece cavity, one end of the elastic piece is connected with the valve core, and the other end of the elastic piece is connected with the second shell. The precise pneumatic adjusting device comprises a novel reversing valve and a needle valve.
Description
Technical Field
The invention relates to the technical field of pneumatic control, in particular to a novel reversing valve and a precise pneumatic adjusting device comprising the same.
Background
The pneumatic reversing valve is a directional control valve with more than two flow forms and more than two air ports, is a valve for realizing the communication, the cutting-off and the reversing of compressed air, the pressure unloading and the sequential action control, and is widely applied to the field of industrial production. The existing reversing valve is generally controlled by a machine, a working opening is covered or opened by the movement of a valve core, a valve body of the reversing valve is in direct contact with a valve core relative movement part, so that the valve body and the valve core of the reversing valve are greatly abraded, the control mode can cause dangers such as heat, sparks and the like due to mechanical friction, and the conventional pneumatic reversing valve generally adopts metal parts, so that the defects of complex structure, more parts, larger volume and inapplicability to small container pipelines exist.
In the prior art, a pure pneumatic control element has inherent advantages in severe environments such as underground tunnels due to the characteristics of fire prevention, explosion prevention and the like, and simultaneously, higher requirements are provided for the control accuracy, the reliability and the like of the pneumatic control element. The element for gas circuit control in the prior art has the advantages of large volume, complex structure, incapability of accurately adjusting flow and poor performance stability. Therefore, how to achieve accurate flow control and improve performance stability is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel reversing valve and a precise pneumatic adjusting device comprising the same, wherein the novel reversing valve has the advantages of simple structure, small volume, convenience in controlling small flow and the like, can be used in severe environments such as humidity, vibration and the like, and avoids the problems of return difference, abrasion, noise, heat generation and the like caused by mechanical friction; the precise pneumatic adjusting device has the characteristics of high control precision, good reliability, compact structure and simple and convenient operation.
The invention provides a novel reversing valve, which comprises a valve core, a shell structure and an elastic piece, wherein the valve core is arranged in the shell structure; the shell structure is internally provided with a first sealed cavity, a second sealed cavity and a third sealed cavity which are mutually communicated, the first sealed cavity is provided with a first gas input channel and a second gas input channel, and the third sealed cavity is provided with a plurality of gas output channels; the valve core is arranged in the shell structure and comprises a gas pressure part, a connecting part and a working part, the gas pressure part divides the first sealed cavity into a gas source cavity and an elastic part cavity, the connecting part is connected with the second sealed cavity, the working part extends into the third sealed cavity, the gas source cavity is communicated with the first gas input channel, and the elastic part cavity is communicated with the second gas input channel; the elastic piece is arranged in the elastic piece cavity, one end of the elastic piece is connected with the valve core, and the other end of the elastic piece is connected with the second shell.
Optionally, the housing structure comprises a first housing and a second housing connected to each other; the first gas input channel comprises a first gas nozzle arranged on the first shell, and the first gas nozzle is communicated with the gas source cavity; the second gas input channel comprises a fourth gas nozzle arranged on the second shell, and the fourth gas nozzle is communicated with the elastic piece cavity.
Optionally, the gas output channel comprises a first gas output channel and a second gas output channel; the first gas output channel comprises a second gas nozzle arranged on the first shell, and the second gas nozzle is communicated with the third sealed cavity through the first working port; the second gas output channel comprises a fourth gas nozzle arranged on the second shell, and the fourth gas nozzle is communicated with the third sealed cavity through a second working port; the working part of the valve core extends to the first working port and the second working port, and swings up and down under the action of air pressure through the air pressure part of the valve core by taking the connecting part as a fulcrum, so that the first working port or the second working port is sealed.
Optionally, a groove is further formed in the second seal cavity, and a boss in clearance fit with the groove is arranged on the connecting portion of the valve core.
Optionally, the first housing and the second housing are both provided with a plastic structure; the valve core is of a structure with a built-in skeleton hard core and an outer ring wrapping a rubber layer; the elastic piece is arranged into a spring structure.
Optionally, a first cavity is formed in the first housing, and a first partition is arranged in the first cavity; the first separator comprises a first vertical separator and a first transverse separator which are connected with each other, the first vertical separator and the first transverse separator divide the first cavity into three cavities A, the first cavity is communicated with the first air nozzle and the first sealed cavity, and the second cavity is communicated with the third cavity; a second cavity is arranged on the second shell, and a second separator is arranged in the second cavity; the second separator comprises a second vertical separator and a second transverse separator which are connected with each other, and the second vertical separator and the second transverse separator divide the second cavity into three cavities B which correspond to the three cavities A one by one; the first working port is arranged on the first diaphragm plate, and the second working port is arranged on the second diaphragm plate.
Optionally, a sealing boss is arranged on the valve core, the sealing boss is arranged at the same position as the first working port and the second working port, and the sealing boss is in a circular truncated cone structure or a sealing ring structure which is matched with the first working port and the second working port; the first working port and the second working port are both arranged to be circular ring structures.
Optionally, a positioning groove is further formed in the valve element, a limiting boss is further arranged on the second shell, one end of the elastic element is sleeved on the limiting boss, and the other end of the elastic element is clamped in the positioning groove.
The invention also provides a precise pneumatic adjusting device, which comprises a needle valve and the novel reversing valve;
the needle valve comprises a base, a shaft sleeve, a needle valve core and a threaded cap;
the base is provided with a mounting hole for mounting a shaft sleeve and a needle valve core, and the shaft sleeve is sleeved on the needle valve core and then is mounted in the mounting hole;
the thread cap is arranged at one end of the needle valve core far away from the shaft sleeve, and the needle valve core is mutually connected with the base through the thread cap; and a conical structure is arranged at the position of the needle valve core close to the shaft sleeve, and the relative annular gap between the conical structure and the bottom hole of the shaft sleeve is adjusted by adjusting the relative position of the needle valve core in the mounting hole, so that the adjustment of the air flow is realized.
Optionally, a spring is further sleeved on the needle valve core, and the spring is arranged at a position where the needle valve core is used for being connected with the shaft sleeve; the shaft sleeve and the needle valve core are also provided with a second sealing structure, and the second sealing structure comprises a sealing groove arranged on the needle valve core and a sealing ring arranged in the sealing groove; and the second sealing structure is used for sealing the spring and the conical structure.
Compared with the prior art, the invention has the following beneficial effects:
(1) The novel reversing valve provided by the invention has the characteristics of simple structure, few parts, small volume and suitability for small-flow occasions by only comprising the valve core, the shell structure (comprising the first shell and the second shell) and the elastic part.
(2) The novel reversing valve further comprises a first shell and a second shell which are connected with each other to form different sealing cavities, wherein the first shell and the second shell are provided with different containing cavities which are separated by a middle rubber pad to form different sealing cavities; four corners of the two shells are connected through rivets, so that the structure is compact; and because the sealing member does not need to be arranged independently, the sealing member has the characteristic of difficult leakage.
(3) According to the novel reversing valve provided by the invention, the valve core swings by adopting air pressure, one end of the valve core swings by controlling the action of air source pressure and spring force, the middle of the valve core is clamped between the grooves of the two shells, and the other end seals the working port on the shell, so that a gas output channel is changed to realize reversing, and the novel reversing valve has the characteristic of sensitive response; and the valve core is arranged to be of a rubber structure (a hard core with a built-in framework, and a rubber layer is wrapped on the outer ring), and the first shell and the second shell are arranged to be of plastic structures, so that the valve core has the characteristics of small overall size, light weight, shock resistance, wear resistance and rust resistance.
(4) According to the precise pneumatic adjusting device provided by the invention, the novel reversing valve and the needle valve are integrated together, and the functions of throttling and opening and closing are simultaneously realized, so that the precise pneumatic adjusting device is compact in structure and suitable for places with narrow space; the opening degree of the valve opening can be adjusted by directly adjusting the knob, and the opening degree can be displayed through reading on the knob, so that the operation is convenient; the movement distance of the valve core is adjusted through threads, stability and reliability are realized, the opening degree of a valve port is controlled by adjusting the gap between the conical valve core and the inner hole of the shaft sleeve, and the flow control is accurate; the whole device is simple in structure, adopts a pure mechanical structure to realize a pneumatic adjusting function, does not depend on an electric control signal, and is not interfered by field electromagnetic interference.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic cross-sectional front view of a novel reversing valve according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the first housing and the second housing of FIG. 1 after they are connected to each other;
FIG. 3 is a schematic cross-sectional front view of a novel reversing valve according to a second embodiment of the present invention;
FIG. 4 is an axial schematic view of the first housing of FIG. 3;
FIG. 5 is an axial view of the second housing of FIG. 3;
FIG. 6 is a schematic axial view of the valve cartridge of FIG. 3;
FIG. 7 is a schematic diagram of an overall axial view of a precise pneumatic adjustment apparatus according to an embodiment of the present invention;
FIG. 8 is a schematic front cross-sectional view of FIG. 7;
FIG. 9 is a schematic bottom view of FIG. 7;
FIG. 10 is an axial schematic view of the needle valve of FIG. 7.
Wherein:
1. the novel reversing valve comprises a novel reversing valve body, 1.1, a reversing valve core, 1.1.1, a positioning groove, 1.1.2, a sealing boss, 1.2, a first shell, 1.2.1, a first air nozzle, 1.2.2, a second air nozzle, 1.2.3, a third air nozzle, 1.2.4, a first spacing body, 1.3.3, a limiting boss, 1.3.4, a second spacing body, 1.3, a second shell, 1.3.1, a fourth air nozzle, 1.3.2, a fifth air nozzle, 1.4, an elastic part, 1.5, a first sealing cavity, 1.6, a second sealing cavity, 1.7, a third sealing cavity, 1.8, a first working port, 1.9, a second working port, 1.10 and a first sealing structure;
2. the device comprises a needle valve, 2.1, a base, 2.1.1, a first air port, 2.1.2, a second air port, 2.1.3, a third air port, 2.1.4, a fourth air port, 2.1.5, a fifth air port, 2.1.6, a blocking port, 2.1.7, a limiting roller, 2.1.8, an indicating roller, 2.2, a shaft sleeve, 2.3, a needle valve core, 2.4, a threaded cap, 2.5, a knob, 2.6, a screw, 2.7, a spring, 2.8, a second sealing structure, 2.9, an air source connecting port, 2.10, an output connecting port, 2.11 and an input connecting port;
3. metal sheet, 4, screw.
Detailed Description
In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided only for the convenience and clarity of the description of the embodiments of the present invention; the numbers mentioned in the present invention are not limited to the specific numbers in the examples of the drawings; the directions or positional relationships indicated by ' front ' middle, ' rear ' left ', right ', upper ', lower ', top ', bottom ', middle ', etc. in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor should be construed as limiting the present invention.
The first embodiment is as follows:
referring to fig. 1 and 2, the present invention provides a novel directional control valve (i.e. a three-way directional control valve), the novel directional control valve 1 includes a directional control valve core 1.1, a first housing 1.2, a second housing 1.3 and an elastic member 1.4;
a first air nozzle 1.2.1, a second air nozzle 1.2.2 and a third air nozzle 1.2.3 are arranged on the first shell 1.2;
a fourth air nozzle 1.3.1 and a fifth air nozzle 1.3.2 are arranged on the second shell 1.3;
the first shell 1.2 and the second shell 1.3 are connected with each other to form a first seal cavity 1.5, a second seal cavity 1.6 and a third seal cavity 1.7 which are communicated in sequence, and a groove used for being connected with the reversing valve core 1.1 is arranged on the second seal cavity 1.6;
the first air nozzle 1.2.1 is communicated with the first sealed cavity 1.5 to form a first air input channel; the fourth air nozzle 1.3.1 is communicated with the first sealed cavity 1.5 to form a second air input channel; the second air tap 1.2.2 is communicated with the third sealed cavity 1.7 through the first working port 1.8, the third air tap 1.2.3 is communicated with the third sealed cavity 1.7, the fifth air tap 1.3.2 is communicated with the third sealed cavity 1.7 through the second working port 1.9, the third air tap 1.2.3 is a normally open gas output channel, the second air tap 1.2.2 and the first working port 1.8 form a first gas output channel, and the second working port 1.9 and the fifth air tap 1.3.2 form a second gas output channel;
the reversing valve core 1.1 comprises a pneumatic part, a connecting part and a working part which are sequentially connected with one another; the air pressure part is arranged in the first sealed cavity 1.5 and divides the first sealed cavity 1.5 into an air source cavity and an elastic part cavity which are arranged at intervals, the air source cavity is communicated with the first air nozzle 1.2.1, the elastic part cavity is communicated with the fourth air nozzle 1.3.1, and an elastic part 1.4 is arranged in the elastic part cavity; the connecting part is provided with a boss structure which is in clearance fit with the groove so as to realize the mutual connection with the second sealing cavity 1.6 and enable the working part to swing up and down by taking the connecting part as a fulcrum; the working part is arranged between the first working opening 1.8 and the second working opening 1.9.
Optionally, in order to effectively ensure a stable connection between the first casing 1.2 and the second casing 1.3, the first casing 1.2 and the second casing 1.3 are preferably connected to each other by riveting.
Optionally, in order to effectively reduce the weight of the novel reversing valve, the first casing 1.2 and the second casing 1.3 are preferably made of plastic; the reversing valve core 1.1 is preferably set to be of a structure with a built-in skeleton hard core and an outer ring wrapped by a rubber layer (namely, the reversing valve core 1.1 comprises a first layer structure and a second layer structure which are completely consistent, the first layer structure is preferably made of steel materials, and the second layer structure is preferably made of rubber materials).
Alternatively, the elastic element 1.4 is preferably provided as a spring structure.
Optionally, all be equipped with first seal structure 1.10 on first air cock 1.2.1, second air cock 1.2.2, third air cock 1.2.3, fourth air cock 1.3.1 and fifth air cock 1.3.2, first seal structure 1.10 is including setting up respectively in the seal groove on first air cock 1.2.1, second air cock 1.2.2, third air cock 1.2.3, fourth air cock 1.3.1 and the fifth air cock 1.3.2 and setting up the sealing washer in the seal groove.
Optionally, the working process of the novel reversing valve provided in this embodiment is specifically as follows:
the first air nozzle 1.2.1 and the fourth air nozzle 1.3.1 are respectively connected with an air inlet source, when the air inlet source is in an opening state with the first air nozzle 1.2.1 and in a closing state with the fourth air nozzle 1.3.1 in an initial state, when the air inlet source conveys air into an air source cavity through the first air nozzle 1.2.1, an air pressure part of the reversing valve core 1.1 is displaced downwards under the action of air pressure, so that the working part swings upwards by taking the connecting part as a fulcrum to seal the first working port 1.8 and open the second working port 1.9 simultaneously to close the second air nozzle 1.2.2 and enable the third air nozzle 1.2.3 and the fifth air nozzle 1.3.2 to be mutually communicated with the air source cavity, so that the air is output from the third air nozzle 1.2.3 and the fifth air nozzle 1.3.2;
when the reversing is realized, the air inlet source and the first air nozzle 1.2.1 are closed, meanwhile, the connection between the air inlet source and the fourth air nozzle 1.3.1 is opened, so that air enters the elastic part cavity, the air pressure part of the reversing valve core 1.1 moves upwards under the acting force of the elastic part and the acting force of the air pressure, and accordingly the working part swings downwards by taking the connecting part as a fulcrum to seal the second working port 1.9, meanwhile, the first working port 1.8 is opened, the fifth air nozzle 1.3.2 is closed, the second air nozzle 1.2.2 and the third air nozzle 1.2.3 are communicated with the air source cavity, so that the air is output from the second air nozzle 1.2.2 and the third air nozzle 1.2.3, and the reversing is realized.
Example two:
in addition to the above-described structure, referring to fig. 3 to 6, the novel directional control valve 1 may be configured as follows: the reversing valve comprises a reversing valve core 1.1, a first shell 1.2, a second shell 1.3 and an elastic piece 1.4;
a first air nozzle 1.2.1, a second air nozzle 1.2.2, a third air nozzle 1.2.3 and a first cavity for mounting a reversing valve core 1.1 are arranged on a first shell 1.2, a first spacing body 1.2.4 is arranged in the first cavity, the first spacing body 1.2.4 comprises a first vertical partition plate and a first transverse partition plate which are connected with each other, the first vertical partition plate and the first transverse partition plate are connected with each other to form a T-shaped structure so as to divide the first cavity into three cavities A, wherein the first cavity is communicated with the first air nozzle 1.2.1 and a first seal cavity 1.5, and the second cavity is communicated with the third cavity; a first working opening 1.8 which can be communicated with the second air nozzle 1.2.2 and the third air nozzle 1.2.3 at the same time is formed in the first diaphragm plate, and the first working opening 1.8 is preferably set to be of a circular structure;
a fourth air nozzle 1.3.1, a fifth air nozzle 1.3.2 and a second cavity for mounting a reversing valve core 1.1 and an elastic piece 1.4 are arranged on the second shell 1.3, and a limit boss 1.3.3 and a second spacing piece 1.3.4 are arranged in the second cavity; the second separator 1.3.4 comprises a second vertical separator and a second transverse separator which are connected with each other, the second vertical separator and the second transverse separator are connected with each other to form a T-shaped structure so as to divide the second cavity into three cavities B which are in one-to-one correspondence with the three cavities A, and a second working port 1.9 which can be simultaneously communicated with the fourth air nozzle 1.3.1 and the fifth air nozzle 1.3.2 is arranged on the second transverse separator;
after the first shell 1.2 and the second shell 1.3 are connected with each other, the first cavity and the second cavity mutually form a first sealed cavity 1.5, a second sealed cavity 1.6 and a third sealed cavity 1.7 which are sequentially communicated; the first air nozzle 1.2.1 is communicated with the first sealed cavity 1.5 to form a first air input channel; the fourth air nozzle 1.3.1 is communicated with the first sealed cavity 1.5 to form a second air input channel; the second air tap 1.2.2 is communicated with the third sealed cavity 1.7 through the first working port 1.8, the third air tap 1.2.3 is communicated with the third sealed cavity 1.7, the fifth air tap 1.3.2 is communicated with the third sealed cavity 1.7 through the second working port 1.9, the second air tap 1.2.2, the first working port 1.8 and the third air tap 1.2.3 form a first gas output channel, and the third air tap 1.2.3, the second working port 1.9 and the fifth air tap 1.3.2 form a second gas output channel;
a positioning groove 1.1.1 and a sealing boss 1.1.2 are arranged on the reversing valve core 1.1, the positioning groove 1.1.1 and the limiting boss 1.3.3 are correspondingly arranged, and the sealing boss 1.1.2, a first working port 1.8 and a second working port 1.9 are arranged at the same position; the reversing valve core 1.1 comprises a pneumatic part, a connecting part and a working part which are sequentially connected with each other; the air pressure part is arranged in the first sealed cavity 1.5 and divides the first sealed cavity 1.5 into an air source cavity and an elastic part cavity which are arranged at intervals, the air source cavity is communicated with the first air nozzle 1.2.1, the elastic part cavity is communicated with the fourth air nozzle 1.3.1, and the elastic part 1.4 is arranged in the elastic part cavity; the connecting part is provided with a boss structure which is in clearance fit with the groove so as to realize the mutual connection with the second sealing cavity 1.6 and enable the working part to swing up and down by taking the connecting part as a fulcrum; the working part is arranged between the first working port 1.8 and the second working port 1.9;
the elastic element 1.4 is preferably set to be a spring structure, one end of the spring structure is sleeved on the limiting boss 1.3.3, and the other end of the spring structure is clamped in the positioning groove 1.1.1 to prevent the spring structure from deviating. Preference is given here to: in order to enable the first working opening 1.8 to be communicated with the second air tap 1.2.2 and the third air tap 1.2.3 at the same time, the height of the first working opening 1.8 is smaller than the depth of the first cavity (namely, the upper end surface of the first working opening 1.8 is arranged between two mutually parallel end surfaces of the first cavity); similarly, in order to enable the second working opening 1.9 to communicate with the fourth air nozzle 1.3.1 and the fifth air nozzle 1.3.2 at the same time, the height of the second working opening 1.9 is smaller than the depth of the second cavity (i.e. the upper end surface of the second working opening 1.9 is arranged between two end surfaces of the second cavity which are parallel to each other).
Optionally, for making sealed boss 1.1.2 can effectively carry out sealing connection to first working opening 1.8 and/or second working opening 1.9, first working opening 1.8 and the equal preferred setting of second working opening 1.9 are the ring structure, sealed boss 1.1.2 sets up to the round platform structure or the sealed annular structure of mutually supporting with first working opening 1.8 and second working opening 1.9.
Optionally, in order to effectively reduce the weight of the novel reversing valve, the first housing 1.2 and the second housing 1.3 are both of plastic structures, and the reversing valve core 1.1 is preferably of a structure in which a built-in skeleton hard core and an outer ring are wrapped by a rubber layer; and to facilitate the preparation of the first and second housings 1.2, 1.3, the first and second cavity walls are both arranged in an inclined configuration.
Optionally, in order to effectively ensure a stable connection between the first casing 1.2 and the second casing 1.3, the first casing 1.2 and the second casing 1.3 are preferably connected to each other by riveting.
Optionally, the working process of the novel reversing valve provided in this embodiment is specifically as follows:
the first air nozzle 1.2.1 and the fourth air nozzle 1.3.1 are respectively connected with an air inlet source, when the air inlet source is in an opening state with the first air nozzle 1.2.1 and in a closing state with the fourth air nozzle 1.3.1 in an initial state, when the air inlet source conveys air into an air source cavity through the first air nozzle 1.2.1, an air pressure part of the reversing valve core 1.1 is displaced downwards under the action of air pressure, so that the working part swings upwards by taking the connecting part as a fulcrum to seal the first working port 1.8 and open the second working port 1.9 simultaneously to close the second air nozzle 1.2.2 and enable the third air nozzle 1.2.3 and the fifth air nozzle 1.3.2 to be mutually communicated with the air source cavity, so that the air is output from the third air nozzle 1.2.3 and the fifth air nozzle 1.3.2;
when the reversing is realized, the air inlet source and the first air nozzle 1.2.1 are closed, meanwhile, the connection between the air inlet source and the fourth air nozzle 1.3.1 is opened, so that air enters the elastic part cavity, the air pressure part of the reversing valve core 1.1 moves upwards under the acting force of the elastic part and the acting force of the air pressure, and accordingly the working part swings downwards by taking the connecting part as a fulcrum to seal the second working port 1.9, meanwhile, the first working port 1.8 is opened, the fifth air nozzle 1.3.2 is closed, the second air nozzle 1.2.2 and the third air nozzle 1.2.3 are communicated with the air source cavity, so that the air is output from the second air nozzle 1.2.2 and the third air nozzle 1.2.3, and the reversing is realized.
Example three:
referring to fig. 7 to 10, the present invention further provides a precise pneumatic adjustment device, which comprises a needle valve 2, a metal sheet 3 and the novel reversing valve 1;
the needle valve 2 comprises a base 2.1, a shaft sleeve 2.2 and a needle valve core 2.3;
the novel reversing valve 1 is arranged between the metal sheet 3 and the base 2.1, five air nozzles of the novel reversing valve 1 correspond to five air ports of the base 2.1, and the metal sheet 3 is fixedly connected with the base 2.1 through screws 4 so as to realize the interconnection between the novel reversing valve 1 and the needle valve 2; and the first air nozzle 1.2.1, the second air nozzle 1.2.2, the third air nozzle 1.2.3, the fourth air nozzle 1.3.1 and the fifth air nozzle 1.3.2 in the novel reversing valve 1 are respectively and correspondingly arranged in a first air port 2.1.1, a second air port 2.1.2, a third air port 2.1.3, a fourth air port 2.1.4 and a fifth air port 2.1.5 which are arranged on the base 2.1, so as to realize the air flow communication between the novel reversing valve 1 and the needle valve 2;
the base 2.1 is also provided with a mounting hole for mounting the shaft sleeve 2.2 and the needle valve core 2.3, and the shaft sleeve 2.2 is sleeved on the needle valve core 2.3, mounted in the mounting hole and fixedly connected with the base 2.1 in an adhesive manner; so that the shaft sleeve 2.2 and the base 2.1 form fixing and sealing.
A threaded cap 2.4 is arranged at one end of the needle valve core 2.3 far away from the shaft sleeve 2.2 and is mutually connected with a base 2.1 through the threaded cap 2.4; and a conical structure is further arranged at the position, close to the shaft sleeve 2.2, of the needle valve core 2.3, and the relative annular gap between the conical structure and the bottom hole of the shaft sleeve 2.2 is adjusted through adjusting the relative position of the needle valve core 2.3 in the mounting hole, so that the adjustment of the size of the air flow is realized.
Optionally, in order to facilitate adjustment of the position of the needle valve element 2.3, a knob 2.5 is further installed at one end of the threaded cap 2.4 away from the base 2.1, and an operator operates the knob 2.5 to adjust the relative gap between the needle valve element 2.3 and the shaft sleeve 2.2. Preference is given here to: in order to realize the relative locking or loosening of the knob 2.5 and the threaded cap 2.4, a screw 2.6 is also arranged on the knob 2.5; in order to facilitate the control of the adjustment amount of the relative clearance between the needle valve core 2.3 and the threaded cap 2.4 by an operator, corresponding scales are further arranged on the knob 2.5.
Optionally, in order to realize automatic reset of the needle valve element 2.3, a spring 2.7 is further sleeved on the needle valve element 2.3, the spring 2.7 is arranged at a position, used for being connected with the shaft sleeve 2.2, of the needle valve element 2.3, and meanwhile, the shaft sleeve 2.2 is used for limiting and fixing the spring 2.7.
Optionally, for realizing the relative seal between needle valve case 2.3 and axle sleeve 2.2, still be equipped with second seal structure 2.8 on axle sleeve 2.2 and needle valve case 2.3, second seal structure 2.8 is including setting up in the seal groove on needle valve case 2.3 and installing the sealing washer in the seal groove. Preference is given here to: the second sealing structure 2.8 is used for sealing the spring 2.7 and the conical structure.
Optionally, in order to limit and display the scale of the needle valve knob 2.5, an indication rod 2.1.8 is arranged on the end face of the valve seat 2.1 close to the knob 2.5 and used for indicating the scale on the knob 2.5, so as to display the opening degree of the valve port; the knob 2.5 is provided with a limiting rod 2.1.8 on the back of the valve seat 2.1, and the rotation of the limiting rod 2.1.7 is limited by installing a boss on the outer ring of the threaded cap 2.4 on the base 2.1, so that the knob 2.5 can only rotate for one circle.
Optionally, for realizing between external air supply and novel switching-over valve 1, communicate each other between external execution unit and the third air cock 1.2.3 and between external execution unit and the fifth air cock 1.3.2, still be equipped with air supply connector 2.9 in base 2.1's bottom, output connector 2.10 and input connector 2.11, first air cock 1.2.1 communicates each other with external air supply through air supply connector 2.9, third air cock 1.2.3 communicates each other through input connector 2.11, output connector 2.10 communicates each other with fifth air cock 1.3.2.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A novel reversing valve is characterized by comprising a valve core, a shell structure and an elastic piece;
the shell structure is internally provided with a first sealing cavity, a second sealing cavity and a third sealing cavity which are communicated with each other, the first sealing cavity is provided with a first gas input channel and a second gas input channel, and the third sealing cavity is provided with a plurality of gas output channels;
the valve core is arranged in the shell structure and comprises a gas pressure part, a connecting part and a working part, the gas pressure part divides the first sealed cavity into a gas source cavity and an elastic part cavity, the connecting part is connected with the second sealed cavity, the working part extends into the third sealed cavity, the gas source cavity is communicated with the first gas input channel, and the elastic part cavity is communicated with the second gas input channel;
the elastic piece is arranged in the elastic piece cavity, one end of the elastic piece is connected with the valve core, and the other end of the elastic piece is connected with the second shell.
2. The novel reversing valve of claim 1 wherein the housing structure includes first and second housings connected to one another;
the first gas input channel comprises a first gas nozzle arranged on the first shell, and the first gas nozzle is communicated with the gas source cavity;
the second gas input channel comprises a fourth gas nozzle arranged on the second shell, and the fourth gas nozzle is communicated with the elastic piece cavity.
3. The novel reversing valve of claim 1, wherein the gas output passage comprises a first gas output passage and a second gas output passage;
the first gas output channel comprises a second gas nozzle arranged on the first shell, and the second gas nozzle is communicated with the third sealed cavity through the first working port;
the second gas output channel comprises a fourth gas nozzle arranged on the second shell, and the fourth gas nozzle is communicated with the third sealed cavity through a second working port;
the working part of the valve core extends to the first working port and the second working port, and swings up and down under the action of air pressure through the air pressure part of the valve core by taking the connecting part as a fulcrum, so that the first working port or the second working port is sealed.
4. The novel reversing valve according to claim 3, characterized in that a groove is further formed in the second seal cavity, and a boss which is in clearance fit with the groove is formed on the connecting portion of the valve core.
5. The novel reversing valve of claim 2 or 4, wherein the first housing and the second housing are both provided as a plastic structure;
the valve core is of a structure with a built-in skeleton hard core and an outer ring wrapping a rubber layer;
the elastic piece is arranged into a spring structure.
6. The new reversing valve as claimed in claim 5, wherein a first cavity is provided in the first housing, the first cavity having a first spacer disposed therein; the first separator comprises a first vertical separator and a first transverse separator which are connected with each other, the first vertical separator and the first transverse separator divide the first cavity into three cavities A, the first cavity is communicated with the first air nozzle and the first sealed cavity, and the second cavity is communicated with the third cavity;
a second cavity is arranged on the second shell, and a second separator is arranged in the second cavity; the second separator comprises a second vertical separator and a second transverse separator which are connected with each other, and the second vertical separator and the second transverse separator divide the second cavity into three cavities B which correspond to the three cavities A one by one;
the first working port is arranged on the first diaphragm plate, and the second working port is arranged on the second diaphragm plate.
7. The novel reversing valve according to claim 6, wherein a sealing boss is arranged on the valve core, the sealing boss is arranged at the same position as the first working port and the second working port, and the sealing boss is arranged in a circular truncated cone structure or a sealing ring structure which is matched with the first working port and the second working port;
the first working opening and the second working opening are both arranged in a circular ring structure.
8. The novel reversing valve according to claim 7, wherein a positioning groove is further formed in the valve core, a limiting boss is further formed in the second housing, one end of the elastic member is sleeved on the limiting boss, and the other end of the elastic member is clamped in the positioning groove.
9. A precision pneumatic adjustment device, characterized by comprising a needle valve and a new reversing valve according to any one of claims 1-8;
the needle valve comprises a base, a shaft sleeve, a needle valve core and a threaded cap;
the base is provided with a mounting hole for mounting a shaft sleeve and a needle valve core, and the shaft sleeve is sleeved on the needle valve core and then is mounted in the mounting hole;
the thread cap is arranged at one end of the needle valve core far away from the shaft sleeve, and the needle valve core is mutually connected with the base through the thread cap; and a conical structure is arranged at the part of the valve core of the needle valve, which is close to the threaded cap, and the relative clearance between the conical structure and the threaded cap is adjusted by adjusting the relative position of the valve core of the needle valve in the mounting hole, so that the adjustment of the air flow is realized.
10. The precise pneumatic adjusting device of claim 9, wherein a spring is further sleeved on the needle valve core, and the spring is arranged at a position where the needle valve core is connected with the shaft sleeve;
the shaft sleeve and the needle valve core are also provided with a second sealing structure, and the second sealing structure comprises a sealing groove arranged on the needle valve core and a sealing ring arranged in the sealing groove; and the second sealing structure is arranged between the spring and the conical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211585143.4A CN115727157A (en) | 2022-12-09 | 2022-12-09 | Novel reversing valve and precise pneumatic adjusting device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211585143.4A CN115727157A (en) | 2022-12-09 | 2022-12-09 | Novel reversing valve and precise pneumatic adjusting device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115727157A true CN115727157A (en) | 2023-03-03 |
Family
ID=85301010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211585143.4A Pending CN115727157A (en) | 2022-12-09 | 2022-12-09 | Novel reversing valve and precise pneumatic adjusting device comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115727157A (en) |
-
2022
- 2022-12-09 CN CN202211585143.4A patent/CN115727157A/en active Pending
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