阅读说明：本技术 一种气动阀门*** (Pneumatic valve positioner ) 是由 郭志寿 于 2019-09-12 设计创作，主要内容包括：本发明涉及气动阀门技术领域,且公开了一种气动阀门定位器,所述波纹管的外圈上套装有套环,所述套环的外圈处固定连接有磁环,所述套环与磁环为定距排列,所述套环与磁环的数量不少于四个,且两两套环与磁环之间相互排斥。通过套环与磁环之间的配合,使得波纹管在使用过程中,由原来的自身弹性,转换为磁力弹性,通过磁环与磁环相斥的力度代替传统波纹管自身材质的弹性力度,使得波纹管的弹性系数一直保持较佳的状态,使得波纹管接收信号压力时,能瞬间做出响应,促使信号压力控制气源,减少调节信号的传递滞后的情况发生,加快阀杆的移动速度,从而提高阀门的线性度,克服阀杆的摩擦力并消除不平衡力的影响,从而保证调节阀的正确定位。(The invention relates to the technical field of pneumatic valves and discloses a pneumatic valve positioner. Through the cooperation between the lantern ring and the magnetic ring, make the bellows in the use, by original self elasticity, convert into magnetic elasticity, replace the elasticity dynamics of traditional bellows self material through the dynamics that magnetic ring and magnetic ring repel each other, make the elastic coefficient of bellows keep the state of preferred always, when making bellows received signal pressure, can make the response in the twinkling of an eye, make signal pressure control air supply, the condition that the transmission of reduction regulating signal lags takes place, accelerate the moving speed of valve rod, thereby improve the linearity of valve, overcome the frictional force of valve rod and eliminate the influence of unbalanced force, thereby guarantee the correct positioning of governing valve.)

1. A pneumatic valve positioner comprises a valve body (1), a corrugated pipe (2), a pressing block (3), a valve rod (4), a spring (5), a stroke pointer (6), a graduated scale (7), sealing filler (8), a valve core (9) and a valve seat (10), wherein the corrugated pipe (2) is fixedly communicated with an opening of the valve body (1), the pressing block (3) is installed at the bottom of the corrugated pipe (2), the valve rod (4) is installed at the bottom of the pressing block (3), the spring (5) is sleeved at the outer ring of the valve rod (4) and is fixedly connected with the bottom of the pressing block (3), the stroke pointer (6) is installed on the valve rod (4) below the spring (5), the graduated scale (7) is installed in the valve body (1), the sealing filler (8) is installed in the valve body (1), the valve core (9) is fixedly connected to the bottom end of the valve rod (4), the valve seat (10) is installed, the method is characterized in that: the corrugated pipe is characterized in that a lantern ring (11) is sleeved on the outer ring of the corrugated pipe (2), a magnetic ring (13) is fixedly connected to the outer ring of the lantern ring (11), the lantern ring (11) and the magnetic ring (13) are arranged at a fixed distance, the number of the lantern ring (11) and the number of the magnetic ring (13) are not less than four, the lantern ring (11) and the magnetic ring (13) are mutually exclusive, a first magnetic block (15) is installed on the valve rod (4), and a second magnetic block (16) located below the first magnetic block (15) is sleeved on the valve rod (4).

2. A pneumatically actuated valve positioner as set forth in claim 1, wherein: the corrugated pipe is characterized in that an adhesive layer (12) is filled in a gap between the corrugated pipe (2) and the sleeve rings (11), every two sleeve rings (11) are fixedly connected with one another by a limiting ring (14), the limiting ring (14) is arc-shaped, the limiting ring (14) is made of elastic rubber, and magnetic poles between every two magnetic rings (13) are the same and mutually exclusive.

3. A pneumatically actuated valve positioner as set forth in claim 1, wherein: the magnetic valve is characterized in that the first magnetic block (15) and the second magnetic block (16) have the same magnetic poles and are mutually repulsive, the inner ring of the second magnetic block (16) is in sliding connection with the outer ring of the valve rod (4), a magnetic yoke (17) positioned outside the first magnetic block (15) and the second magnetic block (16) is fixedly mounted on the inner wall of the valve body (1), and the length of the magnetic yoke (17) is greater than the moving length of the first magnetic block (15).

Technical Field

The invention relates to the technical field of pneumatic valves, in particular to a pneumatic valve positioner.

Background

The pneumatic valve positioner is a conversion device for converting an electrical signal into a pressure signal, controls the opening of an industrial furnace regulating valve by taking compressed air or nitrogen as a working air source, and is generally used for continuously controlling a pneumatic valve actuating mechanism in an industrial furnace temperature automatic control system.

The working principle of the existing pneumatic valve positioner is shown in fig. 4: when the signal pressure of the bellows is increased, the valve rod moves downwards to drive the spring to compress, then the valve core is driven to be close to the nozzle to block the air source, when the signal pressure is weakened, the spring bounces the valve rod to move upwards to drive the bellows to contract, the valve core leaves from the valve seat to open the air source, the bellows and the spring are easy to generate elastic hysteresis after being used for a period, and the signal pressure is continuously changed to cause the bellows and the spring to do reciprocating contraction motion all the time, so that the material inside the bellows and the spring decays to cause the elastic hysteresis between the bellows and the spring, therefore, when the bellows receives the signal pressure, the bellows leaks without output pressure and cannot timely make corresponding deformation, and the bellows is over-compressed, the welding area at the outer edge of the bellows is buckled to generate permanent deformation, the internal crystal lattice is changed to generate stress relaxation, when the bullet loss amount of the corrugated pipe exceeds 18% -20% of the initial elastic force, the whole mechanical sealing of the corrugated pipe leaks, sealing failure is caused, the phenomenon of bullet loss of the corrugated pipe is caused, pressure signals cannot be converted into air sources, meanwhile, when the valve rod is used, the spring deforms along with the injection of the air sources to generate corresponding displacement, when the valve rod rises, the spring elastic force cannot jack up the valve rod, the valve rod cannot return to the initial position, the cam cannot be driven to rotate, the corrugated pipe is blocked by the baffle when receiving the signal pressure, corresponding displacement cannot be generated, output signals cannot be converted into the air sources, and the normal use of the valve positioner is influenced.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the pneumatic valve positioner which has the advantages of durability increase of the corrugated pipe, lasting elasticity and quick response, and solves the problems in the background technology.

The invention provides the following technical scheme: a pneumatic valve positioner comprises a valve body, a corrugated pipe, a pressing block, a valve rod, a spring, a stroke pointer, a dividing ruler, sealing filler, a valve core and a valve seat, wherein the corrugated pipe is fixedly communicated with an opening of the valve body, the pressing block is installed at the bottom of the corrugated pipe, the valve rod is installed at the bottom of the pressing block, the spring is sleeved at the outer ring of the valve rod and fixedly connected with the bottom of the pressing block, the stroke pointer is installed on the valve rod positioned below the spring, the dividing ruler is installed in the valve body, the sealing filler is installed in the valve body, the valve core is fixedly connected at the bottom end of the valve rod, the valve seat is installed at the bottom of the valve body, a lantern ring is sleeved on the outer ring of the corrugated pipe, the outer ring of the lantern ring is fixedly connected with a magnetic ring, the lantern ring and the magnetic, the valve rod is sleeved with a second magnetic block positioned below the first magnetic block.

Preferably, the gap between the corrugated pipe and the lantern ring is filled with an adhesive layer, every two lantern rings are fixedly connected with a limiting ring, the limiting ring is arc-shaped, the limiting ring is made of elastic rubber, and the magnetic poles between every two magnetic rings are the same and mutually exclusive.

Preferably, the first magnetic block and the second magnetic block have the same magnetic pole and are mutually repelled, the inner ring of the second magnetic block is connected with the outer ring of the valve rod in a sliding manner, the inner wall of the valve body is fixedly provided with a magnetic yoke positioned outside the first magnetic block and the second magnetic block, and the length of the magnetic yoke is greater than the moving length of the first magnetic block.

The invention has the following beneficial effects:

1. this pneumatic valve locator, through the cooperation between the lantern ring and the magnetic ring, make the bellows in the use, by original self elasticity, convert into magnetic elasticity, the dynamics of repelling each other through magnetic ring and magnetic ring replaces the elasticity dynamics of traditional bellows self material, make the elastic coefficient of bellows keep the state of preferred always, when making bellows received signal pressure, can make the response in the twinkling of an eye, make signal pressure control air supply, the condition that the transmission of reducing the modulating signal is hysteretic takes place, accelerate the translation rate of valve rod, thereby improve the linearity of valve, overcome the frictional force of valve rod and eliminate the influence of unbalanced force, thereby guarantee the correct positioning of governing valve.

2. This pneumatic valve locator, through the cooperation between first magnetic path and the second magnetic path, replace the elasticity of traditional spring and tired, elasticity lags, make the valve rod when moving, there is spring force to convert into the magnetic path magnetic force that repels each other, make magnetic path in use, magnetic force can not dissipate, make signal pressure weaken, the valve rod can make the reaction rapidly and get back to initial position and open the air supply, make valve rod in use, the translation rate is faster, more steady, simultaneously through the effect of yoke, make the dynamics of repetiting between the magnetic path more concentrated, the quick release between the magnetic force of being convenient for, further increase locator in use's stability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a bellows;

FIG. 3 is a schematic side view of a bellows;

fig. 4 is a schematic structural view of a conventional valve positioner.

In the figure: 1. a valve body; 2. a bellows; 3. briquetting; 4. a valve stem; 5. a spring; 6. a trip pointer; 7. a graduated scale; 8. sealing and filling; 9. a valve core; 10. a valve seat; 11. a collar; 12. an adhesive layer; 13. a magnetic ring; 14. a limiting ring; 15. a first magnetic block; 16. a second magnetic block; 17. and a magnetic yoke.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a pneumatic valve positioner includes a valve body 1, a bellows 2, a press block 3, a valve rod 4, a spring 5, a stroke pointer 6, a scale 7, a sealing filler 8, a valve core 9, and a valve seat 10, the bellows 2 is fixedly communicated with an opening of the valve body 1, the press block 3 is installed at the bottom of the bellows 2, the valve rod 4 is installed at the bottom of the press block 3, the spring 5 is sleeved at an outer ring of the valve rod 4 and is fixedly connected with the bottom of the press block 3, the stroke pointer 6 is installed on the valve rod 4 located below the spring 5, the scale 7 is installed in the valve body 1, the sealing filler 8 is installed in the valve body 1, the valve core 9 is fixedly connected to the bottom of the valve rod 4, the valve seat 10 is installed at the bottom of the valve body 1, a lantern ring 11 is sleeved on the outer ring of the bellows 2, the, the problem that the corrugated pipe 2 generates elastic force lag due to the fact that magnetic rings 13 collide with each other in the contraction process of the corrugated pipe 2 to cause magnetic force attenuation inside the magnetic rings 13, the corrugated pipe 2 cannot play an elastic role, the magnetic rings 13 are fixedly connected to the outer ring of the lantern ring 11, the magnetic rings 13 can be adhered to the lantern ring 11, the distance between the lantern ring 11 can be adjusted in a user-defined mode according to requirements, when the corrugated pipe 2 needs to have strong elastic force, the distance between the lantern ring 11 and the lantern ring 11 can be reduced, the elastic force of the corrugated pipe 2 is controlled, the lantern ring 11 and the magnetic rings 13 are arranged at a fixed distance, the number of the lantern ring 11 and the number of the magnetic rings 13 are not less than four, the lantern ring 11 and the magnetic rings 13 repel each other, a first magnetic block 15 is installed on the valve rod 4, a second magnetic block 16 located below the first magnetic block 15 is, on the one hand, the repulsive force of the magnetism cannot be attenuated along with the time and the use degree, on the other hand, the responsiveness between the magnetic forces is higher and faster, the valve rod 4 is conveniently driven to move, and the corresponding speed of the positioner is increased.

The gap between the corrugated pipe 2 and the sleeve ring 11 is filled with an adhesive layer 12, every two limiting rings 14 are fixedly connected between the sleeve rings 11, each limiting ring 14 is arc-shaped, the limiting rings 14 are made of elastic rubber, magnetic poles between every two magnetic rings 13 are the same and mutually exclusive, the limiting rings 14 can increase the stability of connection between the sleeve rings 11 and the sleeve rings 11, and meanwhile, the durability of the corrugated pipe 2 in use is increased.

The first magnetic block 15 and the second magnetic block 16 have the same magnetic poles and are mutually repulsive, the inner ring of the second magnetic block 16 is slidably connected with the outer ring of the valve rod 4, the magnetic yoke 17 positioned outside the first magnetic block 15 and the second magnetic block 16 is fixedly mounted on the inner wall of the valve body 1, the length of the magnetic yoke 17 is larger than the moving length of the first magnetic block 15, and the repulsive force between the magnetic blocks replaces the spring 5, so that the magnetic force between the magnetic blocks keeps high-strength use durability in use, the valve rod 4 keeps quick response when bouncing upwards, and the valve is accurately positioned.

The working principle is that when the corrugated pipe 2 receives signal pressure, the corrugated pipe gradually expands towards the bottom, then the press block 3 is driven to move downwards, at the moment, the valve rod 4 is subjected to force brought by the press block 3 to drive the first magnetic block 15 to move downwards, then the valve rod 4 drives the valve core 9 to gradually block the valve seat 10, when the signal pressure is weakened, the corrugated pipe 2 contracts towards the direction, no limiting force exists between the two magnetic blocks, magnetic force is generated between the first magnetic block 15 and the second magnetic block 16 to repel each other, the repelling force drives the valve rod 4 to gradually return to the initial position, then the corrugated pipe 2 generates corresponding displacement through the distance between the magnetic rings 13 in the process of contraction and expansion, when the corrugated pipe 2 stretches outwards, the magnetic rings 13 repel each other to drive the corrugated pipe 2 to extend towards one side, when the corrugated pipe 2 contracts, the magnetic rings 13 are brought back by the force of the corrugated pipe 2 to, the corrugated pipe 2 is prevented from deformation by contraction and extrusion in the presence of force.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.