CN216430567U - Electromagnetic pinch valve capable of adjusting gap on line - Google Patents

Abstract

The utility model relates to a pinch valve discloses an electromagnetic pinch valve that can online adjustment clearance, including valve body, the piston main part of setting in the valve body, the piston main part includes last piston, lower piston that sets up side by side along valve body length direction, goes up the piston and can follow valve body length direction and remove, and lower piston and valve body threaded connection go up the piston and have the clearance down between the piston. The lower piston and the valve body are connected through the threads, the valve body does not need to be repeatedly disassembled during assembly and debugging, and only the lower piston needs to be rotated to adjust the gap between the lower piston and the upper piston, so that the debugging steps are simplified, and the time is saved; when the piston is not required to be put into use, the gap between the upper piston and the lower piston is enlarged, so that the pipe fitting is not compressed any more; when the pipe fitting deforms to cause leakage, the gap between the upper piston and the lower piston can be adjusted on line, and replacement or return repair is not needed.

Description

Electromagnetic pinch valve capable of adjusting gap on line

Technical Field

The utility model relates to a pinch valve especially relates to a can online adjustment clearance's electromagnetic pinch valve.

Background

At present, most of electromagnetic pinch valves on the market realize sealing by extruding pipe fittings through a piston and a valve body or roller pins arranged on the valve body, when the electromagnetic pinch valves are assembled and debugged, the piston needs to be screwed for many times to adjust a gap between the piston and the valve body or the roller pins, and the valve body needs to be screwed off from a valve shell in the process. In addition, the voltage is started after the gap is adjusted by adjusting the set screw to adjust the spring force, which wastes time and labor. And for the normally closed electromagnetic pinch valve, after the pipe fitting is installed, the pipe fitting is in a pressed state, and after long-time placement, the pipe fitting is damaged, adhesion is formed or the pipe fitting cannot be normally reset after being opened, so that the flow path is blocked. In addition, the existing electromagnetic pinch valve cannot be adjusted in time when leakage occurs, and only can be detached or returned to a factory for maintenance, so that long maintenance time is often needed.

In addition, an armature and a piston of the electromagnetic pinch valve are rigidly connected by threads, and are guided by different parts respectively, so that severe friction is generated between the piston and a valve body during movement under the condition of accumulated machining errors of a plurality of parts. Therefore, in order to enable the service life of the electromagnetic pinch valve to meet the requirement, the parts are required to have higher precision, the production cost is increased, the assembly difficulty is increased, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses equipment and debugging are inconvenient among the prior art, waste time and energy, and normally closed's electromagnetism pinch valve is after installing the pipe fitting, and the pipe fitting is in the compression state for a long time, and the pipe fitting damage condition easily appears, and the shortcoming of unable in time maintenance electromagnetism pinch valve when leaking appears in addition provides an electromagnetism pinch valve that can online adjustment clearance, simplifies the equipment debugging step, and extension pipe spare life can online adjustment clearance, need not to dismantle the valve body or return the factory.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

but electromagnetic pinch valve of online adjustment clearance, including the valve body, set up the piston main part in the valve body, the piston main part includes upper piston, the lower piston that sets up side by side along valve body length direction, and upper piston can move along valve body length direction, and lower piston and valve body threaded connection have the clearance between upper piston and the lower piston. The lower piston is in threaded connection with the valve body, and the length of the lower piston screwed into the valve body can be adjusted to change the gap between the lower piston and the upper piston, so that the gap required by sealing is obtained.

Furthermore, the device also comprises a valve shell, wherein an armature is arranged in the valve shell, and the armature is connected with the upper piston through a connecting rod. Go up the clearance between piston and the connecting rod and can make it produce when the motion and rock a little, make its guide effect of full play valve body inner wall when the motion, avoid receiving the effort of armature and make its partial pressure valve body one side, and then produce comparatively serious wearing and tearing and finally influence the valve body life-span.

Further, the connecting rod is in threaded connection with the armature.

Further, the upper piston is in clearance fit with the connecting rod.

Further, the outer surface of the upper piston is provided with a boss protruding out of the outer surface of the piston main body. The side face of the boss is in contact with the inner wall of the valve body, so that the contact area is greatly reduced.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect:

1. the valve body structure of disconnect-type is adopted, and lower piston passes through threaded connection with the valve body, and during the assembly debugging, need not pull down the valve body repeatedly, only need the lower piston of rotating, adjust the clearance between lower piston and the last piston, simplified the assembly debugging step, save time.

2. The lower piston can be screwed into the valve body after the pipe fitting (generally adopting a hose) is installed, and the gap between the upper piston and the lower piston is adjusted, so that the pipe fitting does not need to be stretched;

3. when not needing to put into use, can increase the clearance between piston and the lower piston, make the pipe fitting no longer receive the compression, avoid appearing the pipe fitting long-time pressurized and produce the adhesion phenomenon.

4. When the pipe fitting deforms to cause leakage, the gap between the upper piston and the lower piston can be adjusted on line, replacement or factory return maintenance is not needed, and cost is saved.

5. The upper piston and the armature are flexibly connected, and alignment is carried out through self guide parts during movement, so that radial interaction force generated by the upper piston and the armature is avoided, the abrasion of parts is reduced, and the service life is prolonged; the upper piston can slightly shake during movement, and the situation that parts are deviated to one side due to interaction of the upper piston and the lower piston can be effectively avoided, so that friction is generated between the push rod and the valve core or between the piston and the valve body to influence the service life of the pinch valve.

6. The machining precision requirement of parts is reduced, the production efficiency is improved, and the cost is saved; the valve body is characterized in that the part machining precision or the assembly precision is not high, for example, when the armature guide hole has a large position error with the inner hole of the valve body, because the armature is connected with the upper piston through the connecting rod, the upper piston is hung on the connecting rod, a gap exists between the armature guide hole and the inner hole of the valve body, the upper piston can generate a small displacement or shake to perform self-alignment, the radial acting force of the armature on the upper piston caused by the machining error can be avoided, namely, the action force of the armature is not deflected to one side of the valve body to aggravate abrasion or even to be clamped, the service life of a product can be effectively prolonged, and the machining precision requirement of low parts is reduced.

Drawings

Fig. 1 is a longitudinal sectional view of the present invention.

The names of the parts indicated by the numerical references in the drawings are as follows: the valve comprises a lower piston 1, a valve body 2, a needle roller 3, an upper piston 4, a connecting rod 5, an armature 6, a valve shell 7, a coil 8, a valve core 9, a set screw 10, a spring 11, a push rod 12, a snap ring 13, an anti-rotation groove 14, a boss 15 and a notch 16.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Examples

An electromagnetic pinch valve capable of adjusting a gap online is shown in fig. 1 and comprises a valve casing 7, a valve body 2 arranged at the opening end of the valve casing 7, a valve core 9 arranged in the valve casing 7, a spring 11 and a push rod 12 which are all arranged in the valve core 9, a set screw 10 for locking the spring 11 in the valve core 9, a coil 8 wound on the outer surface of the valve core 9, an armature 6 arranged on one side of the push rod 12 and a piston main body arranged in the valve body 2, wherein the piston main body comprises an upper piston 4 arranged on one side of the armature 6 and a lower piston 1 movably arranged in the valve body 2. The upper piston 4 and the lower piston 1 are arranged side by side along the length of the valve body 2. The valve body 2 has a recess 16 on the side for fitting a pipe.

The outer surface of the lower piston 1 is provided with an external thread, the valve body 2 is internally provided with an internal thread, and the lower piston 1 is in threaded connection and matching with the valve body 2. The spring 11 provides pressing force required by sealing, the coil 8 is electrified to generate attraction force on the armature 6 to provide power required by opening, after the pressing force of the spring 11 is adjusted and voltage is started, a pipe fitting is installed in the notch 16 of the valve body 2, the lower piston 1 is screwed into the valve body 2 in a threaded manner, and the gap between the upper piston 4 and the lower piston 1 is adjusted by controlling the screwing length of the lower piston 1, so that the spring 11 is matched with the lower piston to press the pipe fitting, and sealing is realized.

The armature 6 is arranged in the valve shell 7 and located on one side of the valve core 9, the armature 6 is connected with the push rod 12, the upper piston 4 is connected with the armature 6 through the connecting rod 5, the connecting rod 5 is T-shaped, the head of the connecting rod 5 is arranged in the upper piston 4, the connecting rod 5 is in clearance fit with the upper piston 4, and the tail of the connecting rod 5 is in threaded connection with the armature 6. Different from the conventional electromagnetic pinch valve piston which is rigidly connected with an armature 6 through threads, the upper piston 4 and the armature 6 are flexibly connected through a connecting rod 5, the armature 6 is guided through a push rod 12 during action, the upper piston 4 is guided through the inner wall of the valve body 2, and the flexible connection between the upper piston 4 and the armature 6 can enable the upper piston to generate slight shaking during movement, so that the upper piston can fully play a role in guiding the inner wall of the valve body 2 during movement; the valve body 2 is prevented from being deflected to one side of the valve body 2 by the acting force of the armature 6, so that the service life of the valve body 2 is finally influenced due to serious abrasion; because the upper piston can generate small displacement or shake to align automatically, the radial acting force of the armature 6 on the upper piston 4 caused by machining errors can be avoided, the friction between the upper piston 4 and the valve body 2 is reduced, and the service life is prolonged. Therefore, different from the rigid connection mode of the conventional armature 6 and the upper piston 4, which requires that each part has higher size and form and position precision, the flexible connection mode of the present application has lower requirements on the precision of the parts, especially the form and position precision, can reduce the difficulty of processing and assembling, and further saves the cost and improves the production efficiency.

Go up the piston 4 surface and have the boss 15 of protrusion piston main part surface, only the boss 15 side of protrusion piston main part surface contacts with 2 inner walls of valve body during the motion, and the area of contact significantly reduces also can effectively alleviate the wearing and tearing of part, improves life.

The use working process comprises the following steps:

the valve core 9 is installed to the valve casing 7, the coil 8 is matched with the valve core 9 and pressed into the valve casing 7, and the snap ring 13 is installed and fixed. The roller pin 3 is pressed into a hole on the valve body 2, the push rod 12 is pressed into the armature 6, the connecting rod 5 is screwed into the armature 6, the upper piston 4 is hung on the connecting rod 5, the anti-rotation groove 14 on the upper piston 4 is aligned with the roller pin 3 and is arranged in the valve body 2, the valve body 2 is screwed into the valve shell 7 and then is arranged in the spring 11, and the tightening screw 10 is screwed to adjust the pressing force of the spring 11. The pipe fitting is arranged in the gap 16 of the valve body 2, a medium is introduced into the pipe fitting and adjusted to a required pressure, the lower piston 1 is screwed into the valve body 2, the leakage condition of the medium is observed while the lower piston 1 is screwed in to determine the length of the lower piston 1 needing to be screwed in and mark the length, and therefore the gap between the lower piston 1 and the upper piston 4 is controlled, and sealing is achieved. When the electromagnetic pipe clamping valve acts, the coil 8 is electrified to generate electromagnetic force to attract the armature 6 to overcome the action of spring force, and the connecting rod 5 drives the upper piston 4 to act, so that a medium in the pipe fitting flows. When the valve needs to be closed, the coil 8 is powered off, the electromagnetic force disappears, and the spring force of the spring 11 enables the armature 6 to drive the upper piston 4 to move to reduce the gap between the armature and the lower piston 1, so that the pipe is clamped to cut off a flow path.

When the blind medium in the pipe fitting needs the electromagnetic pinch valve to be in standby for a long time, the lower piston 1 can be screwed out outwards, so that the gap between the lower piston 1 and the upper piston 4 is increased, the pressing force applied to the pipe fitting is reduced or even not compressed, the pipe fitting is prevented from being adhered due to long-time compression, and the service life of the pipeline is prolonged. When a medium is introduced into the pipe fitting and the electromagnetic pinch valve works, the lower piston 1 is screwed down, the screwing-in length is controlled according to the marked or actual sealing condition during debugging, and the screwing-in can be stopped after stable sealing is achieved. The self-locking function of the thread can ensure that the gap between the upper piston 4 and the lower piston 1 cannot be changed easily, thereby realizing stable sealing. When the pipe fitting works for a long time and the medium leaks due to deformation caused by multiple times of compression, the screwing length of the lower piston 1 can be adjusted on line to replace the pipe fitting, the electromagnetic pinch valve does not need to be taken down and adjusted, and even the electromagnetic pinch valve is replaced, so that the economic cost and the time cost are saved.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (5)

1. Electromagnetic pinch valve of clearance can online adjustment, including valve body (2), the piston main part of setting in valve body (2), its characterized in that, piston main part includes upper piston (4), lower piston (1) that set up side by side along valve body (2) length direction, and upper piston (4) can be followed valve body (2) length direction and removed, and lower piston (1) and valve body (2) threaded connection have the clearance between upper piston (4) and lower piston (1).

2. The electromagnetic pinch valve with the online adjustable gap according to claim 1, characterized by further comprising a valve housing (7), wherein an armature (6) is arranged in the valve housing (7), and the armature (6) is connected with the upper piston (4) through a connecting rod (5).

3. Electromagnetic pinch valve with an on-line gap adjustment according to claim 2, characterized in that the connecting rod (5) is screwed to the armature (6).

4. The electromagnetic pinch valve with the on-line adjustable gap according to claim 2, characterized in that the upper piston (4) is in clearance fit with the connecting rod (5).

5. The electromagnetic pinch valve with gap adjustable online according to claim 1 or 2, characterized in that the outer surface of the upper piston (4) has a boss (15) protruding the outer surface of the piston body.

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