CN216813063U

CN216813063U - Electric proportional valve

Info

Publication number: CN216813063U
Application number: CN202123072643.1U
Authority: CN
Inventors: 尹国洪; 李海平; 樊衍; 郑美娟
Original assignee: Shenzhen Jiamai Automation Co ltd
Current assignee: Shenzhen Jiamai Automation Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-06-24
Anticipated expiration: 2031-12-08

Abstract

The application discloses an electric proportional valve, which comprises a valve body part and a control part; the valve body part comprises a main valve body, a bottom cover and a middle valve body; the bottom cover is arranged at the bottom end of the main valve body, the middle valve body is arranged at the top end of the main valve body, and the top end of the middle valve body is provided with a pilot seat; the control part comprises a mounting seat, a control circuit board and a control box, the control circuit board is arranged at the top end of the mounting seat, and the control box is covered outside the control circuit board; at least two sets of clamping components are arranged between the mounting seat and the pilot seat, each clamping component comprises a clamping block and an elastic clamping plate, the clamping block is arranged on the side wall of the pilot seat in a protruding mode, the elastic clamping plates are fixedly arranged at the bottom end of the mounting seat, a clamping groove is formed in the position, close to the end portion, of each elastic clamping plate, and when the clamping blocks are matched with the clamping grooves, the bottom end of the mounting seat is abutted to the top end of the pilot seat. This application links into an organic whole with valve body portion and control part through the joint subassembly, can dismantle valve body portion or control part alone to the convenience is maintained electric proportional valve.

Description

Electric proportional valve

Technical Field

The application relates to the technical field of valves, in particular to an electric proportional valve.

Background

The electric proportional valve is a main device in a pneumatic industrial automation system, and can realize the control of gas pressure and flow according to the magnitude of an electric signal. The electric proportional valve can realize continuous and stepless regulation of air pressure, can realize remote control and program control, and is particularly suitable for occasions requiring continuous or stepless regulation of the air pressure.

Chinese utility model patent with publication number CN212690999U in the related art discloses an electric proportional valve, which comprises a main valve body, a bottom cover, a middle valve body, a pilot seat and a control box, wherein the bottom cover is arranged at the bottom end of the main valve body, and the middle valve body is arranged at the top end of the main valve body. The main valve body is provided with an air inlet and an air outlet which are communicated through an air inlet valve port; a first valve core is arranged between the main valve body and the bottom cover, a first spring is arranged between the first valve core and the bottom cover, and the first valve core is driven by the first spring to plug the air inlet valve port; an exhaust cavity is formed between the middle valve body and the main valve body, the exhaust cavity is communicated with the air outlet through an exhaust valve port, a second valve core is arranged in the exhaust cavity, a second spring is arranged between the second valve core and the middle valve body, and the second valve core is driven by the second spring to block the exhaust valve port; the guide seat is positioned at the top end of the middle valve body, a diaphragm is arranged between the middle valve body and the guide seat in a pressing mode, an upper cavity is formed between the diaphragm and the guide seat, a lower cavity is formed between the diaphragm and the middle valve body, a valve rod is fixed on the diaphragm, a check ring is clamped in the middle of the valve rod, and a third spring for driving the check ring to abut against the second valve core is arranged between the diaphragm and the middle valve body; the control box covers the top of the guide seat, a control circuit board, an electromagnetic valve and a display panel are arranged in the control box, a pressure sensor used for monitoring the output air pressure at the air outlet is arranged on the control circuit board, the electromagnetic valve comprises an air inlet electromagnetic valve and an air outlet electromagnetic valve, and the air pressure of the upper cavity is controlled through the air inlet electromagnetic valve and the air outlet electromagnetic valve.

When the valve is used, the air inlet valve port is kept closed under the driving of the first spring, the air outlet valve port is kept open under the driving of the third spring, the air inlet electromagnetic valve is in an open state, the air outlet electromagnetic valve is in a closed state, the upper cavity can be gradually filled with air, so that the first valve core is pushed downwards to move, the air inlet valve port is opened, the air outlet valve port is closed, and then the air flows out from the air outlet. Meanwhile, the pressure sensor can detect the air pressure at the air outlet, the air pressure detected by the sensor is fed back to the control circuit board, and whether the air pressure is a set value or not is judged; when the detected air pressure is larger than a set value, the exhaust electromagnetic valve is opened and drives the upper cavity to exhaust, so that the valve rod moves upwards, the opening size of the air inlet valve port is reduced, and the air pressure of the air outlet is reduced; when the detected air pressure is smaller than the set value, the air inlet electromagnetic valve is opened to drive the upper cavity to be inflated, and the valve rod moves downwards, so that the opening size of the air inlet valve port is increased, and the air pressure of the air outlet is increased along with the opening size.

After the electric proportional valve is used for a long time, parts such as a sealing ring and the like in the valve body can be aged, so that the electric proportional valve needs to be detached and replaced. In view of the above-mentioned related art, the inventor considers that the structure of the control part is complex, and in the above-mentioned technology, the main valve body, the intermediate valve body and the pilot seat are locked and fixed into a whole by bolts, and the components of the control part are directly mounted on the pilot seat.

SUMMERY OF THE UTILITY MODEL

In order to facilitate maintenance of the electric proportional valve, the application provides the electric proportional valve.

The application provides an electric proportional valve adopts following technical scheme:

an electric proportional valve comprises a valve body part and a control part;

the valve body part comprises a main valve body, a bottom cover and a middle valve body; the bottom cover is arranged at the bottom end of the main valve body, the middle valve body is arranged at the top end of the main valve body, and a pilot seat is arranged at the top end of the middle valve body;

the control part comprises a mounting seat, a control circuit board and a control box, the control circuit board is arranged at the top end of the mounting seat, and the control box is covered outside the control circuit board;

be provided with at least two sets of joint subassemblies between mount pad and the guide seat, the joint subassembly includes fixture block and elasticity joint board, the fixture block arch sets up in the lateral wall of guide seat, elasticity joint board is fixed to be set up in the bottom of mount pad, the draw-in groove that is used for supplying fixture block card to go into is offered to the position that elasticity joint board is close to the end, when fixture block and draw-in groove cooperate, the bottom of mount pad and the top looks butt of guide seat.

Through adopting above-mentioned technical scheme, valve body portion links into an organic whole through the joint subassembly with control part, when the inside spare part of valve body portion or control part need be dismantled and change, breaks away from the fixture block through ordering about elastic clamping board, can unblock the subassembly, can become two independent whole with valve body portion and control part split to can dismantle valve body portion or control part alone, can reduce the dismouting degree of difficulty of electric proportional valve, and then the convenience is maintained electric proportional valve.

Optionally, a positioning slot for inserting the elastic clamping plate is formed in the side wall of the guide seat, the clamping block is arranged on the side wall of the positioning slot, and when the clamping block is clamped into the clamping slot, the elastic clamping plate is completely accommodated in the positioning slot.

Through adopting above-mentioned technical scheme, positioning slot can guide the inside that the elasticity joint board inserted positioning slot to the convenience links together valve body portion and control part, and simultaneously, positioning slot can carry on spacingly to the elasticity joint board, thereby can lift the joint strength between valve body portion and the control part, promotes the stability of electric proportional valve in the use.

Optionally, the fixture block is provided with a guide inclined surface for guiding the elastic clamping plate to be completely inserted into the positioning slot.

Through adopting above-mentioned technical scheme, the in-process that the elasticity joint board inserted the positioning slot, the direction inclined plane can guide elasticity joint board to produce elastic deformation and pass through the fixture block to make things convenient for the fixture block card to go into the inside of draw-in groove.

Optionally, a special-shaped sealing ring is arranged between the mounting seat and the pilot seat.

Through adopting above-mentioned technical scheme, the leakproofness of gas circuit between mount pad and the guide's seat can be promoted to the special-shaped sealing washer to prevent that gas from revealing from the clearance between mount pad and the guide's seat, promote the accuracy of electric proportional valve.

Optionally, the guide seat is provided with an unlocking assembly for driving the elastic clamping plate to be separated from the clamping block.

Through adopting above-mentioned technical scheme, when needing to dismantle valve body portion and control part, order about elastic clamping board through the unblock subassembly and take place elastic deformation and break away from the fixture block, can remove the location of elastic clamping board to the convenience is dismantled electric proportional valve.

Optionally, the mounting groove has been seted up to the lateral wall of guide seat, the unblock subassembly sets up in the inside of mounting groove, the unblock subassembly includes first push rod, second push rod and drive gear, first push rod and second push rod meshing transmission are in drive gear's both sides, and when promoting first push rod to the inside of mounting groove, the second push rod can order about the elasticity joint board and break away from the fixture block.

Through adopting above-mentioned technical scheme, when promoting first push rod to the inside direction of mounting groove, first push rod drive gear rotates, drives the opposite direction removal of second push rod along first push rod simultaneously to can promote elasticity joint board and break away from the fixture block.

Optionally, the side wall of the mounting groove is provided with a guide groove, the side walls of the first push rod and the second push rod are provided with guide blocks, and the guide blocks are arranged inside the guide groove in a sliding manner.

Through adopting above-mentioned technical scheme, the guide block cooperates with the guide way, can guide first push rod and second push rod to carry out linear movement to promote the stability of first push rod and the second push rod in-process that slides.

Optionally, an elastic element for driving the first push rod to slide away from the mounting groove is arranged on the guide seat.

Through adopting above-mentioned technical scheme, the elastic component can prevent that first push rod from sliding to the inside of mounting groove to prevent that the second push rod from supporting and pressing elasticity joint board, and then promote the stability of electric proportional valve in the use.

Optionally, a rubber sealing ring is arranged between the control box and the mounting seat.

Through adopting above-mentioned technical scheme, rubber seal can keep the inside leakproofness of control box to can prevent steam entering, promote the life of control portion.

In summary, the present application includes at least one of the following advantages:

1. through the arrangement of the clamping assembly, the valve body part and the control part are connected into a whole through the clamping assembly, when the positioning of the clamping assembly is released, the valve body part and the control part can be separated, and the valve body part or the control part can be independently disassembled and assembled, so that the installation difficulty of the electric proportional valve can be reduced, and the maintenance of the electric proportional valve is facilitated;

2. through the setting of unblock subassembly, the location of joint subassembly can conveniently be relieved to the unblock subassembly to conveniently maintain electric proportional valve.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is an exploded view of the present embodiment showing the contour seal;

FIG. 3 is a schematic cross-sectional view of the present embodiment showing the transmission gear;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

fig. 5 is an enlarged schematic view at B in fig. 3.

Description of the reference numerals: 1. a valve body portion; 11. a main valve body; 12. an intermediate valve body; 13. a bottom cover; 14. a pilot base; 141. positioning the slot; 142. mounting grooves; 143. a guide groove; 144. a placement groove; 145. positioning a groove; 2. a control unit; 21. a mounting seat; 211. a ring groove; 22. a control circuit board; 23. a control box; 3. a clamping assembly; 31. a clamping block; 311. a guide slope; 32. an elastic clamping and connecting plate; 321. a card slot; 4. a special-shaped sealing ring; 5. an unlocking assembly; 51. a first push rod; 52. a second push rod; 53. a transmission gear; 54. a guide block; 6. a compression spring; 7. a rubber seal ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses an electric proportional valve. Referring to fig. 1 and 2, the electric proportional valve has a rectangular shape as a whole, and includes a valve body portion 1 and a control portion 2. The valve body part 1 comprises a main valve body 11, an intermediate valve body 12 and a bottom cover 13, wherein the bottom cover 13 is fixedly arranged at the bottom end of the main valve body 11, and the intermediate valve body 12 is arranged at the top end of the main valve body 11; the top end of the middle valve body 12 is provided with a pilot seat 14, and the pilot seat 14, the main valve body 11 and the middle valve body 12 are connected into a whole through bolts.

Referring to fig. 3 and 4, the control section 2 includes a mount 21, a control circuit board 22, and a control box 23; the control circuit board 22 is fixedly arranged at the top end of the mounting base 21, and the control box 23 is covered outside the control circuit board 22; the upper end face of the mounting seat 21 is provided with a ring groove 211, the inside of the ring groove 211 is provided with a rubber sealing ring 7 in a clamping manner, and the top end of the rubber sealing ring 7 is abutted against the bottom end of the control box 23, so that the control box 23 is kept in a sealing state.

Referring to fig. 1 and 3, at least two sets of clamping assemblies 3 are arranged between the mounting seat 21 and the pilot seat 14, the clamping assemblies 3 in this embodiment are provided with four sets, the four sets of clamping assemblies 3 are respectively arranged on four side walls of the electric proportional valve, and the valve body 1 and the control part 2 are connected into a whole through the clamping assemblies 3.

Referring to fig. 2 and 5, the side wall of the guide seat 14 is provided with a rectangular positioning slot 141, and the positioning slot 141 is arranged in the vertical direction and the top end of the positioning slot 141 penetrates through. The clamping assembly 3 includes a clamping block 31 and an elastic clamping plate 32, the elastic clamping plate 32 is integrally formed at the bottom end of the mounting seat 21, the elastic clamping plate 32 in this embodiment is made of an aluminum alloy material, and the size of the elastic clamping plate 32 is the same as that of the positioning slot 141, when the elastic clamping plate 32 is completely inserted into the positioning slot 141, the bottom end of the mounting seat 21 abuts against the top end of the pilot seat 14, and in other embodiments, the elastic clamping plate 32 may be made of an elastic material such as plastic; the elastic clamping plate 32 is provided with a clamping groove 321 with a rectangular cross section in a penetrating manner, and the clamping groove 321 is closed and is located at a position, close to the bottom end, of the elastic clamping plate 32; the latch 31 is integrally formed on the sidewall of the positioning slot 141, and when the elastic latch plate 32 is completely inserted into the positioning slot 141, the latch 31 is engaged with the engaging slot 321.

The top end of the clamping block 31 is provided with a guide inclined surface 311, the guide inclined surface 311 inclines upwards and faces one side away from the guide seat 14, and when the elastic clamping plate 32 is inserted into the positioning slot 141, the bottom end of the elastic clamping plate 32 abuts against the guide inclined surface 311, so that the elastic clamping plate 32 can be guided to elastically deform in the direction away from the guide seat 14, and the elastic clamping plate 32 can be conveniently and completely inserted into the positioning slot 141; when the elastic engaging plate 32 is completely inserted into the positioning slot 141, the elastic engaging plate 32 can be reset, so that the latch 31 is engaged with the inside of the engaging slot 321.

Referring to fig. 2 and 3, a placing groove 144 is formed in the upper end surface of the pilot base 14, a special-shaped sealing ring 4 is installed in the placing groove 144, the special-shaped sealing ring 4 is made of a rubber material, and when the fixture block 31 is in clamping fit with the clamping groove 321, the special-shaped sealing ring 4 is abutted against the lower end surface of the mounting base 21, so that the sealing performance of the air circuit connection between the mounting base 21 and the pilot base 14 can be ensured.

Referring to fig. 3 and 5, the side wall of the pilot seat 14 is provided with a mounting groove 142 with a rectangular cross section, the mounting groove 142 is located at the bottom end of the positioning slot 141, an unlocking assembly 5 for driving the elastic clamping plate 32 to be separated from the clamping block 31 is arranged inside the mounting groove 142, and the positioning between the mounting seat 21 and the pilot seat 14 is released by controlling the unlocking assembly 5, so that the electric proportional valve is conveniently maintained.

The unlocking assembly 5 comprises a first push rod 51, a second push rod 52 and a transmission gear 53, wherein the transmission gear 53 is rotatably arranged inside the mounting groove 142, and the first push rod 51 and the second push rod 52 are respectively meshed and driven on two sides of the transmission gear 53; the first push rod 51 and the second push rod 52 are integrally provided with a guide block 54, the guide block 54 in the embodiment is a dovetail block, two opposite side walls of the installation groove 142 are both provided with a guide groove 143, and the guide block 54 is slidably arranged in the guide groove 143 so as to guide the movement of the first push rod 51 and the second push rod 52; when the first push rod 51 is pushed towards the inside of the mounting groove 142, the second push rod 52 can extend out of the mounting groove 142 and press against the elastic clamping plate 32 in a direction away from the mounting groove 142, so that the elastic clamping plate 32 is elastically deformed to separate from the clamping block 31.

The guide seat 14 is provided with an elastic member for driving the first push rod 51 to slide in a direction away from the mounting groove 142, and the elastic member in this embodiment is a compression spring 6; a positioning groove 145 is formed in the side wall of the mounting groove 142 away from the notch, one end of the compression spring 6 is inserted into the positioning groove 145, and the other end of the compression spring extends out of the mounting groove 142 and abuts against the end of the first push rod 51; in the natural state of the compression spring 6, the outer end surface of the first push rod 51 is flush with the side wall of the guide seat 14, and the inner end surface of the second push rod 52 is abutted against the groove wall of the mounting groove 142, so that the first push rod 51 can be prevented from sliding away from the mounting groove 142.

The implementation principle of an electric proportional valve of the embodiment of the application is as follows:

when the electric proportional valve needs to be maintained, the first push rod 51 is pressed inside the mounting groove 142, the transmission gear 53 can be driven to rotate, the second push rod 52 is driven to slide in the direction away from the mounting groove 142, the elastic clamping plate 32 is abutted and pressed, the elastic clamping plate 32 is separated from the clamping block 31, the mounting seat 21 and the pilot seat 14 are unlocked, and the valve body portion 1 and the control portion 2 can be detached, so that the electric proportional valve can be maintained.

When the electric proportional valve is installed, the bottom end of the elastic clamping plate 32 can abut against the guide inclined surface 311 by inserting the elastic clamping plate 32 into the positioning slot 141, so that the elastic clamping plate 32 is driven to elastically deform in a direction away from the guide seat 14; when the elastic engaging plate 32 is completely inserted into the positioning slot 141, the elastic engaging plate 32 can be reset, so that the engaging block 31 is engaged with the inside of the engaging groove 321, thereby connecting the valve body portion 1 and the control portion 2 into a whole.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An electrical proportional valve characterized by: comprises a valve body part (1) and a control part (2);

the valve body part (1) comprises a main valve body (11), a bottom cover (13) and a middle valve body (12); the bottom cover (13) is arranged at the bottom end of the main valve body (11), the middle valve body (12) is arranged at the top end of the main valve body (11), and the top end of the middle valve body (12) is provided with a pilot seat (14);

the control part (2) comprises a mounting seat (21), a control circuit board (22) and a control box (23), the control circuit board (22) is arranged at the top end of the mounting seat (21), and the control box (23) is covered outside the control circuit board (22);

be provided with at least two sets of joint subassemblies (3) between mount pad (21) and guide seat (14), joint subassembly (3) are including fixture block (31) and elasticity joint board (32), fixture block (31) arch sets up in the lateral wall of guide seat (14), elasticity joint board (32) are fixed to be set up in the bottom of mount pad (21), draw-in groove (321) that are used for supplying fixture block (31) card to go into are offered to the position that elasticity joint board (32) are close to the tip, when fixture block (31) and draw-in groove (321) cooperate, the bottom of mount pad (21) and the top looks butt of guide seat (14).

2. An electrical proportioning valve according to claim 1 wherein: the lateral wall of guide seat (14) is seted up and is used for supplying elasticity joint board (32) male location slot (141), fixture block (31) set up in the lateral wall of location slot (141), when fixture block (31) card is gone into the inside of draw-in groove (321), elasticity joint board (32) are accomodate in the inside of location slot (141) completely.

3. An electrical proportioning valve according to claim 2 wherein: the clamping block (31) is provided with a guide inclined surface (311) for guiding the elastic clamping plate (32) to be completely inserted into the positioning slot (141).

4. An electrical proportioning valve according to claim 1 wherein: and a special-shaped sealing ring (4) is arranged between the mounting seat (21) and the guide seat (14).

5. An electrical proportioning valve according to claim 1 wherein: the guide seat (14) is provided with an unlocking assembly (5) for driving the elastic clamping plate (32) to be separated from the clamping block (31).

6. An electrical proportioning valve according to claim 5 wherein: the side wall of the pilot seat (14) is provided with a mounting groove (142), the unlocking assembly (5) is arranged inside the mounting groove (142), the unlocking assembly (5) comprises a first push rod (51), a second push rod (52) and a transmission gear (53), the first push rod (51) and the second push rod (52) are meshed and transmitted to two sides of the transmission gear (53), and when the first push rod (51) is pushed to the inside of the mounting groove (142), the second push rod (52) can drive the elastic clamping plate (32) to be separated from the clamping block (31).

7. An electric proportional valve according to claim 6, wherein: the side wall of the mounting groove (142) is provided with a guide groove (143), the side walls of the first push rod (51) and the second push rod (52) are provided with guide blocks (54), and the guide blocks (54) are arranged inside the guide groove (143) in a sliding mode.

8. An electrical proportioning valve according to claim 7 wherein: the guide seat (14) is provided with an elastic piece used for driving the first push rod (51) to slide towards the direction far away from the installation groove (142).

9. An electrical proportioning valve according to claim 1 wherein: and a rubber sealing ring (7) is arranged between the control box (23) and the mounting seat (21).