CN211117902U - Pneumatic film actuating mechanism with adjustable spring range - Google Patents

Abstract

The utility model provides a pneumatic film actuating mechanism that spring scope can be adjusted. Pneumatic film actuating mechanism that spring scope can be adjusted, including lower membrane lid, last membrane lid and valve body, through bolt fixedly connected with diaphragm between the bottom of going up the membrane lid and the top of lower membrane lid, the bottom fixedly connected with limiting plate of diaphragm, the bottom of limiting plate is rotated and is connected with the locating part. The utility model provides a pneumatic film actuating mechanism that spring scope can be adjusted rotates through the locating part with actuating mechanism below for thereby spring among the actuating mechanism is forced upwards to compress and has reached when not having compressed air to act on, the purpose of the extension tension increase of spring, thereby the power that is used for sealing that makes the valve receive can strengthen, thereby reduced the leakage quantity of valve, when effectual reduction let out leakage quantity reach the certain degree, the valve can't satisfy the customer requirement, need reprocess the phenomenon to the valve.

Description

Pneumatic film actuating mechanism with adjustable spring range

Technical Field

The utility model relates to a pneumatic film actuating mechanism field especially relates to a pneumatic film actuating mechanism that spring scope can be adjusted.

Background

The pneumatic film actuating mechanism is a common pneumatic actuating mechanism used on a regulating valve, and consists of an upper film cover, a lower film cover, a spring, a tray, a limiting plate, a push rod and other parts. When compressed air is introduced into the actuating mechanism, the diaphragm of the actuating mechanism pushes the push rod to move upwards, so that the distance between the valve core and the valve seat of the valve is changed, and the flow of a medium passing through the valve is changed.

The pneumatic membrane actuating mechanism in the prior art is in a medium scouring and corrosion environment for a long time due to the fact that the regulating valve is located in the medium scouring and corrosion environment, the sealing surface of the valve core and the valve seat of the valve becomes rough under the long-term medium action, and therefore after the valve is used for a certain time, the leakage amount between the valve core and the valve seat is increased, when the leakage amount reaches a certain degree, the valve cannot meet the customer requirements, and the valve needs to be repaired.

Therefore, it is necessary to provide a pneumatic membrane actuator with adjustable spring range to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pneumatic film actuating mechanism that spring scope can be adjusted has solved the pneumatic film actuating mechanism among the prior art because the governing valve is in the medium for a long time and erodees, corrodes for the problem that leakage quantity increases between case and the disk seat.

For solving the technical problem, the utility model provides a pair of pneumatic film actuating mechanism that spring range can be adjusted, including lower membrane lid, upper membrane lid and valve body, through bolt fixedly connected with diaphragm between the bottom of upper membrane lid and the top of lower membrane lid, the bottom fixedly connected with limiting plate of diaphragm, the bottom of limiting plate is rotated and is connected with the locating part, the bottom fixedly connected with support of lower membrane lid, the bottom of locating part and the top threaded connection of support, the bottom of locating part runs through the support and extends to the outside of support, the surface cover of locating part is equipped with the split nut, the top of split nut and the top fixed connection of support inner wall.

Preferably, the inside of locating part is provided with the push rod, the bottom of push rod runs through the locating part and extends to the outside of locating part, the push rod is located the outside bottom fixedly connected with butt joint piece of locating part, the equal first pointer of fixedly connected with in both sides of locating part surface bottom, it has the second pointer to run through one side of butt joint piece, the bottom fixedly connected with valve rod of butt joint piece, the bottom of valve rod runs through support and valve body in proper order and extends to the inside of valve body, the valve rod is located the inside bottom fixedly connected with case of valve body.

Preferably, the top of the valve body is fixedly connected with an upper cover through a bolt, and the top of the upper cover penetrates through the support and extends into the support.

Preferably, the top of the upper cover positioned in the support is fixedly connected with a gland through a bolt, and two sides of the bottom of the gland are fixedly connected with the bottom of the inner wall of the support through bolts.

Preferably, the top of the diaphragm is fixedly connected with a limiting frame through a bolt, and a spring is fixedly connected between the top of the diaphragm and the top of the upper diaphragm cover.

Preferably, one side of the inner wall of the bracket is fixedly connected with a first dial and a second dial from top to bottom in sequence.

Preferably, the surface of locating part is provided with the sealing washer, the air inlet has been seted up in proper order of lower membrane lid bottom.

Compared with the prior art, the utility model provides a pneumatic membrane actuating mechanism that spring scope can be adjusted has following beneficial effect:

the utility model provides a pneumatic membrane actuating mechanism with adjustable spring range, when the pressure of compressed air is reduced, the bullet in the actuating mechanism stretches downwards, at the moment, the diaphragm, the tray and the push rod of the actuating mechanism also move downwards under the action of spring force, thereby driving the valve rod, the valve core and the like of the valve to move downwards, through rotating the limiting part below the actuating mechanism, after the limiting part is adjusted, the limiting part is locked by adjusting the tightening nut, thereby avoiding the swinging of the limiting part during use, leading the spring in the actuating mechanism to be forced to compress upwards, thereby achieving the purpose that when no compressed air acts, the stretching tension of the spring is increased, further leading the sealing force borne by the valve to be increased, further reducing the leakage of the valve, effectively reducing the leakage amount to reach a certain degree, the valve can not meet the customer requirements and needs to be repaired.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a pneumatic membrane actuator with adjustable spring range according to the present invention;

fig. 2 is a schematic structural view of the stent shown in fig. 1.

Reference numbers in the figures: 1. the device comprises a support, 2, a push rod, 3, a limiting piece, 4, a split nut, 5, a sealing ring, 6, an air inlet, 7, a limiting plate, 8, a lower membrane cover, 9, a membrane, 10, an upper membrane cover, 11, a spring, 12, a butt joint block, 13, a first pointer, 14, a second pointer, 15, a gland, 16, an upper cover, 17, a valve body, 18, a valve core, 19, a first dial, 20, a second dial, 21, a valve rod, 22 and a limiting frame.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a preferred embodiment of a pneumatic membrane actuator with adjustable spring range according to the present invention; fig. 2 is a schematic structural view of the stent shown in fig. 1. The pneumatic thin film actuator with adjustable spring range comprises a lower thin film cover 8, an upper thin film cover 10 and a valve body 17, wherein a diaphragm 9 is fixedly connected between the bottom of the upper thin film cover 10 and the top of the lower thin film cover 8 through a bolt, a limiting plate 7 is fixedly connected to the bottom of the diaphragm 9, a limiting part 3 is rotatably connected to the bottom of the limiting plate 7, a support 1 is fixedly connected to the bottom of the lower thin film cover 8, the bottom end of the limiting part 3 is in threaded connection with the top of the support 1, the bottom of the limiting part 3 penetrates through the support 1 and extends to the outside of the support 1, a butt-clamp nut 4 is sleeved on the surface of the limiting part 3, the top end of the butt-clamp nut 4 is fixedly connected with the top of the inner wall of the support 1, the limiting part 3 is screwed on the support 1 through threaded connection, a very long thread is arranged on the limiting part 3 for rotating the limiting, so as to rotate the limiting piece 3, and the limiting piece 3 below the actuating mechanism is rotated, so that the spring 11 in the actuating mechanism is forced to be compressed upwards, and the purpose of increasing the stretching force of the spring 11 when no compressed air acts is achieved.

The inside of locating part 3 is provided with push rod 2, the bottom of push rod 2 runs through locating part 3 and extends to the outside of locating part 3, push rod 2 is located the outside bottom fixedly connected with butt joint piece 12 of locating part 3, the equal first pointer 13 of fixedly connected with in both sides of the 3 surperficial bottoms of locating part, it has second pointer 14 to run through one side of butt joint piece 12, the bottom fixedly connected with valve rod 21 of butt joint piece 12, support 1 and valve body 17 and the inside that extends to valve body 17 are run through in proper order to the bottom of valve rod 21, valve rod 21 is located the inside bottom fixedly connected with case 18 of valve body 17, under the effect of spring 11 power, also downstream together, thereby drive the valve rod 21 of valve, also downstream such as case 18.

The top of valve body 17 is passed through bolt fixedly connected with upper cover 16, and the top of upper cover 16 runs through support 1 and extends to the inside of support 1, and the inside valve cage of having seted up of valve body 17 to the inside valve seat ring that is provided with of valve cage.

The top that the upper cover 16 is located support 1 inside is through bolt fixedly connected with gland 15, and the both sides of gland 15 bottom are all through the bottom fixed connection of bolt and support 1 inner wall, can make valve body 17 and support 1 fixed more firm through gland 15.

Bolt fixedly connected with spacing frame 22 is passed through at the top of diaphragm 9, fixedly connected with spring 11 between the top of diaphragm 9 and the top of last membrane lid 10, and a plurality of spring 11 of fixedly connected with between the top of diaphragm 9 and the top of last membrane lid 10 can effectually avoid excessive to spring 11 through setting up spacing frame 22, leads to spring 11 to damage.

A first dial 19 and a second dial 20 are fixedly connected to one side of the inner wall of the bracket 1 from top to bottom in sequence, the rising height of the stopper 3 can be indicated by the cooperation of the first pointer 13 and the first dial 19, and the rising height of the push rod 2 can be indicated by the cooperation of the second pointer 14 and the second dial 20.

The surface of locating part 3 is provided with sealing washer 5, the air inlet 6 has been seted up in proper order to lower diaphragm cover 8 bottom, and compressed air passes through air inlet 6, is full of the cavity between diaphragm 9 and the lower diaphragm cover 8, and when compressed air pressure's continuous increase can avoid outside air influence diaphragm 9 and the atmospheric pressure balance in the cavity between the lower diaphragm cover 8 through sealing washer 5.

The utility model provides a pneumatic film actuating mechanism that spring scope can be adjusted's theory of operation as follows:

when compressed air passes through the air inlet 6 and fills the cavity between the diaphragm 9 and the lower diaphragm cover 8, along with the continuous increase of the compressed air pressure, the diaphragm 9 and the tray move upwards under the action of the compressed air, so that the compression spring 11 moves upwards, the push rod 2 of the actuating mechanism is driven to move upwards, parts such as the valve rod 21, the valve core 18 and the like of the valve connected with the push rod 2 also move upwards, when the pressure of the compressed air is reduced, the elastic piece 11 in the actuating mechanism stretches downwards, at the moment, the diaphragm 9, the tray and the push rod 2 of the actuating mechanism also move downwards together under the action of the spring 11 force, so that the valve rod 21, the valve core 18 and the like of the valve are driven to move downwards, and the limiting piece 3 below the actuating mechanism rotates, so that the spring 11 in the actuating mechanism is forced to compress upwards.

Compared with the prior art, the utility model provides a pneumatic membrane actuating mechanism that spring scope can be adjusted has following beneficial effect:

when the pressure of the compressed air is reduced, the springs 11 in the actuator are stretched downwards, and at this time the diaphragm 9, the tray and the push rod 2 of the actuator, under the action of the force of the spring 11, the valve rod 21 and the valve core 18 of the valve are driven to move downwards together, by rotating the limiting piece 3 below the actuating mechanism, the spring 11 in the actuating mechanism is forced to be compressed upwards, so that the aim of increasing the stretching force of the spring 11 when no compressed air acts is achieved, thereby increasing the sealing force applied to the valve, reducing the leakage of the valve, effectively reducing the phenomena that the valve can not meet the requirements of customers and needs to be repaired when the leakage reaches a certain degree, after the limiting part 3 is adjusted, the limiting part 3 is locked by adjusting the butt-clamping nut 4, so that the limiting part 3 is prevented from shaking in use.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a pneumatic diaphragm actuating mechanism that spring scope can be adjusted, includes lower diaphragm cover (8), upper diaphragm cover (10) and valve body (17), its characterized in that: go up between the bottom of membrane lid (10) and the top of membrane lid (8) down through bolt fixedly connected with diaphragm (9), the bottom fixedly connected with limiting plate (7) of diaphragm (9), the bottom of limiting plate (7) is rotated and is connected with locating part (3), the bottom fixedly connected with support (1) of membrane lid (8) down, the bottom of locating part (3) and the top threaded connection of support (1), the bottom of locating part (3) runs through the outside that support (1) just extended to support (1), the surface cover of locating part (3) is equipped with to split nut (4), the top of split nut (4) and the top fixed connection of support (1) inner wall.

2. The spring-range adjustable pneumatic diaphragm actuator of claim 1, a push rod (2) is arranged inside the limiting piece (3), the bottom of the push rod (2) penetrates through the limiting piece (3) and extends to the outside of the limiting piece (3), the bottom end of the push rod (2) positioned outside the limiting piece (3) is fixedly connected with a butt-joint block (12), two sides of the bottom of the surface of the limiting piece (3) are fixedly connected with first pointers (13), a second pointer (14) penetrates through one side of the butt joint block (12), a valve rod (21) is fixedly connected to the bottom of the butt joint block (12), the bottom end of the valve rod (21) penetrates through the support (1) and the valve body (17) in sequence and extends into the valve body (17), the bottom end of the valve rod (21) in the valve body (17) is fixedly connected with a valve core (18).

3. The pneumatic diaphragm actuator with adjustable spring range according to claim 2, wherein an upper cover (16) is fixedly connected to the top of the valve body (17) through a bolt, and the top of the upper cover (16) penetrates through the bracket (1) and extends to the inside of the bracket (1).

4. The pneumatic membrane actuator with adjustable spring range according to claim 3, characterized in that the top of the upper cover (16) inside the support (1) is fixedly connected with a gland (15) through bolts, and both sides of the bottom of the gland (15) are fixedly connected with the bottom of the inner wall of the support (1) through bolts.

5. The pneumatic diaphragm actuator with adjustable spring range according to claim 1, wherein a limiting frame (22) is fixedly connected to the top of the diaphragm (9) through a bolt, and a spring (11) is fixedly connected between the top of the diaphragm (9) and the top of the upper diaphragm cover (10).

6. Pneumatic membrane actuator with adjustable spring range according to claim 1, characterized in that a first scale (19) and a second scale (20) are fixedly connected to one side of the inner wall of the bracket (1) from top to bottom in sequence.

7. The pneumatic diaphragm actuator with adjustable spring range according to claim 1, wherein the surface of the limiting member (3) is provided with a sealing ring (5), and the bottom of the lower diaphragm cover (8) is sequentially provided with an air inlet (6).

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