WO2011057554A1

WO2011057554A1 - Membrane valve with medium or large caliber controlled by low moment

Info

Publication number: WO2011057554A1
Application number: PCT/CN2010/078545
Authority: WO
Inventors: 陈久挺; 陈乐威
Original assignee: Chen Jiuting; Chen Lewei
Priority date: 2009-11-12
Filing date: 2010-11-09
Publication date: 2011-05-19
Also published as: CN101706007A

Abstract

A membrane valve with a medium or large caliber controlled by a low moment has a valve body (1) and a valve cover (2). The valve body (1) is internally provided with a valve passage (11), a valve seat (12) and a valve core. A connecting cavity (13) is provided between the valve cover (2) and the valve body (1) to communicate a medium inlet passage (111) and a medium outlet passage (112). The valve core is composed of a membrane (14) and an erecting assembly (15) thereof. The membrane (14) and the erecting assembly (15) thereof are positioned between the medium inlet passage (111) and the connecting cavity (13) as well as between the medium outlet passage (112) and the connecting cavity (13) and are in contact with the valve seat (12). The end surface of the part of the membrane (14) that faces the medium inlet passage (111) is provided with several pilot holes (113). A communication passage (16) which is in communication with the connecting cavity (13) is provided on the valve body (1), a pressure relief passage (17) that is in communication with environment is provided in the communication passage (16), and a micro-switch (18) is provided between the pressure relief passage (17) and the communication passage (16). The membrane valve can control the opening and closing of a valve with a medium or large caliber and the flux adjusting thereof by a low moment.

Description

Large torque diaphragm valve for small torque control

Technical field

The invention relates to a diaphragm valve, in particular to a large-diameter diaphragm valve for small torque control.

Background technique

Currently, The opening and closing force and the opening and closing torque when the valve is opened or closed. When closing the valve, it is necessary to form a certain sealing pressure between the opening and closing parts and the sealing surface of the bearing seat, and at the same time overcome the valve stem and the packing and the valve stem. Friction and medium pressure between the thread of the nut, the end of the stem and other frictional parts, and therefore must exert a certain opening and closing force and opening and closing torque, the maximum value is the initial moment of closing or the initial opening Instantaneous. Lead to high torque actuators (motors, cylinders, handwheels, etc.) to control valve opening or closing and flow regulation, increasing production costs (materials and energy) and reducing production efficiency .

technical problem

In order to overcome the existing medium and large diameter valves, it is not possible to open the valve with a small torque. Insufficient, the present invention provides a large-diameter diaphragm valve for small torque control, in which the large-diameter diaphragm valve can not only open and close a large-diameter valve with a small torque control Flow regulation, and easy to use intelligent control, manual control, electric control, electromagnetic control, pneumatic control, hydraulic control.

Technical solution

To achieve the above object, the present invention provides the following technical solutions: A small-diameter control medium-diameter diaphragm valve includes a valve body and a valve cover, wherein the valve body is provided with a valve passage, a valve seat and a valve core, and the valve passage comprises a medium inlet passage and a medium outlet passage. A connecting chamber is provided between the valve cover and the valve body for guiding the medium inlet passage and the medium outflow passage, wherein the valve core is a erecting component of the diaphragm and the diaphragm, and the diaphragm and the erecting component thereof are placed on the medium. The inlet passage and the medium outflow passage are connected with the connecting chamber and are in contact with the valve seat, and the diaphragm faces the end surface of the medium entering the passage portion with a plurality of pilot holes, and the valve body is provided with the connecting cavity a flow guiding channel, wherein the flow guiding channel is provided with a pressure relief channel that is connected to the outside, and a micro switch that forms a pressure relief channel and the flow guiding channel is turned on or off between the pressure releasing channel and the guiding channel; The pressure relief channel and the flow guiding channel are connected to form a pressure relief of the connecting cavity, and the diaphragm and the erecting component thereof move toward the connecting cavity, and the connecting cavity communicates with the medium inlet channel and the medium outflow channel to form a medium inlet channel and a medium outflow channel. The discharge passage and the flow guiding passage are closed, and the diaphragm closes the connecting chamber to form a closing of the medium inlet passage and the medium outflow passage. .

Beneficial effect

According to the above technical solution, the valve cannot be opened if the pressure in the connecting chamber is not removed, regardless of the valve having a large diameter; instead, the micro switch is rotated to make the pressure reducing channel and the conduction channel conduct, The pressure in the connecting chamber can be removed, the operation is convenient, the structure is simple, and the labor is saved, the labor is not required, the manpower and material resources are saved, the production cost is reduced, and the opening and closing speed is fast, and the working efficiency is improved.

among them, The diaphragm includes a connecting sealing surface and a pressure receiving surface, and the connecting sealing surface of the diaphragm is pressed between the valve cover and the valve body, and the cross section of the pressure receiving surface of the diaphragm is flat, the The erecting assembly includes a spring that is in contact with the pressure receiving surface of the diaphragm in the connecting cavity, a movable bracket that is moved toward the diaphragm, and a bracket that is opposite to the diaphragm at one end of the movable bracket. The bracket is provided with a plurality of through holes. The valve seat is a connecting seat between the medium inlet passage and the connecting chamber, wherein the micro switch is a knob exposed outside the valve body, and the knob extends to one end between the pressure reducing passage and the flow guiding passage. Seal. The above arrangement enhances the sealing and supportability of the diaphragm, so that the diaphragm is fixed to prevent the diaphragm from being twisted and broken.

The present invention is further configured such that the spring is a conical spring, including a large end and a small end, the large end of which is in contact with the diaphragm, and the small end is in contact with the valve cover.

By adopting the above technical solution, the conical spring is used to make the pressure of the spring against the one end of the diaphragm slightly larger, the pressure of the spring is strengthened, the sealing property of the diaphragm is improved, and the pressure is evenly distributed.

The present invention is further configured to: the micro switch is controlled by a driving mechanism, and the display operation is performed by a signal transmission between the driving mechanism and the background display mechanism.

By adopting the above scheme, the micro-motion small torque switch can be intelligently controlled, and the operation is convenient and simple.

Wherein, the driving mechanism is a micro-motor solenoid valve, and the background display mechanism is a display screen and a background processor connected to the micro-motor solenoid valve. The use of micro-motor solenoid valve control is more common, and the applicability is strong; the display can enable the operator to observe whether the valve is open or closed.

The present invention is further described below in conjunction with the accompanying drawings:

DRAWINGS

1 is a schematic view showing a closed state according to Embodiment 1 of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

3 is a schematic diagram of an open state according to Embodiment 1 of the present invention;

Figure 4 is a cross-sectional view taken along line B-B of Figure 2;

Figure 5 is a top plan view of the bracket in the first embodiment of the present invention;

6 is a schematic diagram of a closed state according to Embodiment 2 of the present invention;

Figure 7 is an enlarged view of a portion I of Figure 6;

Figure 8 is a cross-sectional view taken along line C-C of Figure 6;

FIG. 9 is a schematic diagram of an open state according to Embodiment 2 of the present invention; FIG.

Fig. 10 is a sectional view taken along line D-D of Fig. 9;

BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 1 and FIG. 6 , the present invention is a small-diameter control large-diameter diaphragm valve including a valve body 1 and a valve cover 2, wherein the valve body 1 is provided with a valve channel 11 and a valve seat 12 and The valve body 11 includes a medium inlet passage 111 and a medium outflow passage 112. The valve cover 2 and the valve body 1 are provided with a connection chamber for the medium inlet passage 111 and the medium outlet passage 112 to be electrically connected. 13. The spool is a mounting assembly 15 for the diaphragm 14 and the diaphragm 14. The diaphragm 14 and its mounting assembly 15 are disposed between the medium inlet passage 111 and the medium outflow passage 112 and the connecting chamber 13 and are in contact with the valve seat 12. A plurality of pilot holes 113 are defined in the end surface of the diaphragm 14 facing the portion of the medium inlet passage 111. The valve body 11 is provided with a flow guiding passage 16 that is electrically connected to the connecting chamber 13. The guiding channel 16 is provided with the outside world. A pressure-removing passage 17 is provided, and a micro-switch 18 is formed between the pressure-relieving passage 17 and the flow guiding passage 16 to form a pressure-reducing passage 17 and a flow guiding passage 16 to be turned on or off, and the pressure-reducing passage 17 and the guide The flow channel 16 is electrically connected to form a pressure relief of the connection chamber 13, and the diaphragm 14 and its erecting assembly 15 are moved toward the connection chamber 13, and the connection chamber 13 and the medium enter. The passage 111 and the medium outflow passage 112 communicate to form a conduction between the medium inlet passage 111 and the medium outflow passage 112, and the pressure relief passage 17 With the flow guiding channel 16 closed, the diaphragm 14 closes the connecting chamber 13 and constitutes the closing of the medium inlet passage 111 and the medium outflow passage 112. This setting makes Regardless of the valve having a large diameter, if the pressure in the connection chamber 13 is not removed, the valve cannot be opened; otherwise, the micro switch 18 is simply rotated to make the pressure relief passage 17 and the conduction passage 16 conduct. The pressure in the connecting chamber 13 is removed, the operation is convenient, labor-saving, no need to consume a large amount of manpower, saving manpower and material resources, reducing production cost; and opening and closing speed is fast, and the production efficiency is improved. The diaphragm 14 includes a connecting sealing surface 141 and a pressure receiving surface 142. The connecting sealing surface 141 of the diaphragm 14 is pressed between the valve cover 2 and the valve body 1, and the valve cover 2 and the valve body 1 are sealed. The connection ensures the sealing performance of the diaphragm 14 and prevents the pressure from being unloaded and affecting the normality of the valve body. Turn it on or off. The micro switch 18 is a knob exposed outside the valve body 1. The knob extends to one end between the pressure relief passage 17 and the flow guiding passage 16 to be provided with a gasket 181, and the gasket 181 of the micro switch 18 will discharge the pressure passage 17 After the valve 16 is blocked, the valve body 1 is closed. On the contrary, when the gasket 181 is disengaged from the pressure relief passage 17 and the flow guiding passage 16, the valve body 1 can be opened, and the sealing and control manner is simple and operation. Convenient, it can be implemented with a little jog.

As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5, in the first embodiment of the present invention, the pressure receiving surface 142 of the diaphragm 14 has a flat cross section, and the erecting assembly 15 includes a connection. A spring 151 in the cavity 13 that is in contact with the pressure receiving surface 142 of the diaphragm 14 and a movable bracket 152 and the diaphragm 14 that are in contact with the diaphragm 14 are disposed opposite to the bracket 153 at one end of the movable bracket. A plurality of through holes 1531, a bracket 153 and a movable bracket 152 are respectively provided for fixing the diaphragm 14, preventing deformation or distortion thereof from affecting normal opening or closing of the valve, and the through hole 1531 of the bracket 153 is arranged for The medium abuts the diaphragm 14, and the valve seat 12 is a connecting seat between the medium inlet passage 111 and the connecting chamber 13.

As shown in FIG. 6, FIG. 7, FIG. 8, FIG. 9, FIG. 10, in the second embodiment of the present invention, the cross section of the pressure receiving surface 142 of the diaphragm 14 is convexly disposed toward the connecting cavity 13, and the mounting assembly 15 includes a spring 151 in the connecting cavity 13 that is in contact with the pressure receiving surface 142 of the diaphragm 14, and an arcuate movable bracket 154 that moves in contact with the diaphragm 14. The diaphragm 14 is composed of two pieces, and the two diaphragms 14 are sandwiched between The hard steel plate 155 is provided. The arrangement strengthens the pressure of the diaphragm 14, prevents the diaphragm 14 from being crushed by pressure, and extends the service life of the diaphragm 14. The valve seat 12 is the medium outflow passage 112 and the connection chamber 13. The connection between the rooms.

In

Embodiments

1 and 2 of the present invention, depending on the flow direction of the medium, the diaphragm 14 can be supported by brackets of different shapes.

In the first and second embodiments of the present invention, the spring 151 used between the diaphragm 14 and the valve cover 2 is a conical spring, and includes a large end 1511 and a small end 1512. The large end 1511 is in contact with the diaphragm 14, and the small end is 1512 is in contact with the bonnet 2. The use of the conical spring causes the spring 151 to slightly pressurize the one end of the diaphragm 14, which reinforces the pressing force of the spring 151 and improves the sealing of the diaphragm 14. Of course, it should be noted that it is also feasible to use a common spring with a columnar cross section.

The micro switch 18 is controlled by the drive mechanism 3, the drive mechanism 3 and the background display mechanism 4 The operation is displayed by signal transmission. In the implementation of the present invention, the drive mechanism 3 is micro-electric The machine solenoid valve, the background display mechanism 4 is a display screen and a background processor connected to the micro motor solenoid valve. Of course, it should be noted that the micro switch 18 can also be controlled by manual, pneumatic or hydraulic control, and is feasible.

Embodiments of the invention

Industrial applicability

Sequence table free content

Claims

A small-diameter control medium-diameter diaphragm valve includes a valve body and a valve cover, wherein the valve body is provided with a valve passage, a valve seat and a valve core, and the valve passage comprises a medium inlet passage and a medium outlet passage. The utility model is characterized in that: a connecting chamber is provided between the valve cover and the valve body for conducting the medium inlet passage and the medium outflow passage, wherein the valve core is a erecting component of the diaphragm and the diaphragm, and the diaphragm and the erection thereof The component is disposed between the medium inlet passage and the medium outflow passage and the connecting chamber, and is in contact with the valve seat, and the diaphragm faces the end surface of the medium entering the passage portion with a plurality of pilot holes, and the valve body is provided with the connecting cavity guide a flow guiding channel, wherein the flow guiding channel is provided with a pressure relief channel that is connected to the outside, and a micro switch that forms a pressure relief channel and the flow guiding channel is turned on or off between the pressure releasing channel and the guiding channel; The pressure relief channel and the flow guiding channel are connected to form a pressure relief of the connecting cavity, and the diaphragm and the erecting component thereof move toward the connecting cavity, and the connecting cavity communicates with the medium inlet channel and the medium outflow channel to form a medium inlet channel and a medium outflow. The conduction of the channel, The pressure relief channel and the flow guiding channel are closed, and the diaphragm closes the connecting cavity to form a closing of the medium inlet channel and the medium outflow channel.
The small-diameter control medium-diameter diaphragm valve according to claim 1, wherein the diaphragm comprises a connecting sealing surface and a pressure receiving surface, and the connecting sealing surface of the diaphragm is pressed on the valve cover and the valve body. The cross-section of the pressure receiving surface of the diaphragm is flat, and the erecting assembly includes a spring that is in contact with the pressure receiving surface of the diaphragm in the connecting cavity, and a movable bracket and film that is moved and moved with the diaphragm. The piece is opposite to the bracket at one end of the movable bracket, and the bracket is uniformly provided with a plurality of through holes, the valve seat is a connecting seat between the medium inlet passage and the connecting cavity, and the micro switch is exposed outside the valve body a knob extending to one end between the pressure relief passage and the flow guiding passage is provided with a gasket.
The small-diameter control medium-diameter diaphragm valve according to claim 1, wherein the diaphragm comprises a connecting sealing surface and a pressure receiving surface, and the connecting sealing surface of the diaphragm is pressed on the valve cover and the valve body. The cross-section of the pressure receiving surface of the diaphragm is disposed toward the connecting cavity, and the erecting assembly includes a spring in the connecting cavity that is in contact with the pressure receiving surface of the diaphragm, and an arcuate movable bracket that moves in contact with the diaphragm. The diaphragm is composed of two pieces, and a hard steel plate is interposed between the two diaphragms. The valve seat is a connecting seat between the medium outflow passage and the connecting cavity, and the micro switch is exposed a knob outside the valve body, the knob extending to one end between the pressure relief passage and the flow guiding passage is provided with a gasket.
The small-diameter control medium-diameter diaphragm valve according to claim 2 or 3, wherein the spring is a conical spring, and includes a large end and a small end, the big end of which is in contact with the diaphragm, and the small end is The bonnet is in contact.
The small-diameter control medium-diameter diaphragm valve according to claim 1 or 2 or 3, wherein the micro-switch is controlled by a driving mechanism, and the driving mechanism and the background display mechanism perform a signal transmission display operation.
The small-diameter control medium-diameter diaphragm valve according to claim 5, wherein the driving mechanism is a micro-motor solenoid valve, and the background display mechanism is a display screen and a background processor connected to the micro-motor solenoid valve.