CN111911655A - A stop type electric valve - Google Patents

Abstract

The invention discloses a stop-type electric valve, which belongs to the technical field of refrigeration electric valves. The present invention aims at the problems of complex structure and poor connection position accuracy that the existing electric valve is driven by a decelerating stepping motor. In the present invention, the valve shell is integrally formed by casting, and the welding seam is less, which is beneficial to ensure the air tightness of the product, the assembly process is simple, and the quality of the product is easily guaranteed. The valve shell is cast and molded, with strong pressure resistance and more stable dimensions under high pressure. The valve housing is provided with protrusions matching the stop parts, which can provide the installation strength of the stop parts, limit the rotation angle of the ultimate planetary gear carrier, and the stop strength is high, which greatly improves the stop reliability of the planetary gear system.

Description

A stop type electric valve

technical field

The invention belongs to the technical field of refrigeration electric valves, and particularly relates to a stop-type electric valve.

Background technique

R32 refrigerant multi-connection has realized the organic combination of the two advantages, which perfectly fits the two development trends of environmental protection and energy saving in the air-conditioning industry. However, the R32 refrigerant has weak flammability, and the multi-connection amplifies the defect of the weak flammability of the R32 refrigerant. For example, if there is a leak in a room, since the total amount of refrigerant in the multi-connection is far greater than the amount of refrigerant in the single unit, once a leak occurs, the consequences of the multi-connection are far greater than that of the single unit. Therefore, the multi-line needs to implement the function of cutting off the refrigerant leakage immediately after detecting the refrigerant leakage. In multi-connection, in order to reduce the power load of the main control board, reduce the heating and energy saving of the main control board, etc., the shut-off valve is required to have the characteristics of low power, and the electric ball valve with a deceleration stepper motor is undoubtedly the most ideal product.

Patent publication number CN 110725997 A discloses a stop-type electric valve. The electric valve includes a control part, a casing part, a gear reduction mechanism, and a valve body part. The control part includes a cover body and a rotor part. The gear reduction mechanism includes a gear ring and an output gear rack. Including a protruding portion, the valve body part includes a valve stem, a valve stem kit, the valve stem kit includes a cylindrical portion and an extension portion, the extension portion includes an inner end portion and an outer end portion, and the protruding portion can abut with the inner end portion to limit the output gear In the circumferential rotation stroke of the frame, the outer end is placed in the concave portion to limit the circumferential rotation of the gear ring, and the valve stem can rotate relative to the cylindrical portion in the circumferential direction. The present invention limits the circumferential rotation of the gear ring on the one hand, and limits the circumferential rotation stroke of the output gear carrier on the other hand by setting the valve stem set. Although the electric valve is driven by a deceleration stepping motor, the electric valve has the characteristics of large flow capacity, high sealing performance and low power consumption, which meets the relevant requirements of the shut-off valve. However, its structure is complex, the connection position accuracy of the shell parts and valve body parts is relatively poor, and the position accuracy of the fixed gear ring is also relatively poor, which makes it difficult to ensure the position accuracy of the output shaft and the gear system, and in severe cases, the product is stuck.

SUMMARY OF THE INVENTION

Aiming at the problems of complex structure and poor connection position accuracy of the existing electric valve driven by a deceleration stepping motor, the present invention aims to provide an electric valve with relatively simple structure and assembly procedure, and good accuracy and stability.

To this end, the present invention adopts the following technical solutions: a stop-type electric valve, comprising a valve core, a valve housing, a rotor part and a planetary gear system, the rotor part and the planetary gear system are drive-connected, and the valve core is installed on the In the valve casing of the valve core, the planetary gear system is connected with the valve core, and the rotation of the valve core is driven by the rotor part to realize the opening and closing of the valve port of the valve core. The two sides of the valve core through hole are respectively connected to the inlet and outlet pipes. It is characterized in that a circular installation groove for installing the planetary gear system is formed on the top of the valve housing, and a plurality of pairs of oppositely arranged protrusions are integrally formed in the circular installation groove. A stop member limited by the protrusion is provided.

As a supplement and improvement to the above technical solutions, the present invention also includes the following technical features.

The planetary gear system includes a gear ring and an output gear carrier, the gear ring is fixedly arranged in the circular installation groove, the inner side of the gear ring is provided with a tooth portion, and the output gear carrier is It is arranged in the gear ring, the output gear carrier planetary gear is matched with the tooth part of the gear ring, the stop part is arranged under the gear ring, and the circumferential direction of the stop part has a protrusion extending into the protrusion. There is an extension between the stopper parts, thereby restricting the circumferential rotation of the stopper parts. Because the protrusions are integrally formed with the bottom of the shell, most of the torsion force the stopper parts bear is borne by the protrusions. The cooperation between the stopper parts and the protrusions can greatly improve the stop The reliability of the moving part is improved; the top of the stop part is provided with at least two fan-shaped protrusions that protrude upward, and the bottom of the output gear rack extends downward to form limit protrusions located between the fan-shaped protrusions When the upper limit protrusion of the gear rack meets the fan-shaped protrusion, the output gear rack stops rotating.

The extension part is welded and fixed to the groove bottom of the circular installation groove.

The fan-shaped protrusions limit the rotation range of the output gear rack to 90°.

The planetary gear system is connected with the valve core through the output shaft passing through the central hole of the stop member, the output shaft and the output gear carrier are integrally formed, and the valve core is provided with There is a special-shaped hole for connecting the output shaft, and the bottom of the output shaft is a special-shaped part matched with the special-shaped hole. The output shaft and the output gear carrier are integrally formed, which can reduce the clearance between the output shaft and the output gear carrier, improve the output accuracy of the planetary gear system, thereby improving the quality of the product, and can also eliminate the collision between the two during transmission, further Eliminate product running noise. Since the special-shaped structure of the special-shaped part on the output shaft is matched with the special-shaped hole on the valve core, the valve core through hole and the valve core special-shaped hole are also directionally related, so the special-shaped structure on the output shaft and the valve core through hole also form a direction correlation. In order to ensure the consistency of the pulse (referred to as the valve opening pulse) required by the valve core from fully closed to flow, it is necessary to improve the consistency of the direction association between the special-shaped structure of the output shaft and the limit protrusion of the output gear frame. The output shaft and the output gear frame are integrally formed, which makes it easier to ensure the consistency of the direction correlation between the special-shaped structure of the output shaft and the limit protrusion on the output gear frame, thereby making it easier to ensure the consistency of the valve opening pulse of the product.

The valve shell is composed of two cylindrical parts whose center lines are perpendicular to each other, the vertical cylindrical part is arranged at the middle position of the outer part of the lateral cylindrical part through the neck, and the through hole for piercing the output shaft is arranged in the middle position. The neck, the through hole and the valve shell are integrally cast, so that the subsequent machining accuracy can be easily guaranteed, the horizontal cylindrical part forms the valve core accommodating cavity for installing the Circular mounting slot.

The through hole used to wear the output shaft is fitted with the output shaft and the stop part from the inside to the outside, and a positioning seat is arranged on the outer periphery of the lower side of the output shaft. The top of the positioning seat is provided with a positioning seat. It cooperates and abuts with the stop member, so as to realize the movable axial limit of the output shaft. By coaxially installing the output shaft and the stop member, the positional accuracy between the two is ensured, the positional accuracy between the planetary gear system and the output shaft is improved, and the rotation reliability of the planetary gear system is provided.

The planetary gear system is encapsulated by the valve casing, and the bottom of the valve casing is fixed with the top of the circular installation groove; the rotor part is arranged above the gear reduction mechanism, and the rotor part is wrapped and installed by a sleeve, so The sleeve is fixed on the valve housing.

The number of the protrusions is two pairs, and the four protrusions are evenly distributed and arranged in the circular installation groove.

The present invention can achieve the following beneficial effects: 1. By integrally casting the valve shell, the present invention has fewer welds, which is beneficial to ensure the air tightness of the product, the assembly process is simple, and the product quality is easily guaranteed. The valve shell is cast and molded, with strong pressure resistance and more stable dimensions under high pressure. The valve housing is provided with protrusions matching the stop parts, which can provide the installation strength of the stop parts, limit the rotation angle of the ultimate planetary gear carrier, and the stop strength is high, which greatly improves the stop reliability of the planetary gear system. 2. The present invention installs the gear ring through the installation station with a certain axial length of the circular installation groove, and the positioning length is long, which is convenient to ensure the coaxiality of the fixed gear ring. 3. In the present invention, a limited positioning mechanism is arranged on the output shaft to ensure that even if there is an unbalanced force in the gear accommodating cavity and the valve core accommodating cavity, the force will not be transmitted to the planetary gear system. 4. The output shaft and the planetary gear carrier of the present invention are integrally arranged, which reduces the contact and collision between the output shaft and the gear carrier, and reduces the running noise of the product. At the same time, the integrated setting of the two is beneficial to improve its ability to transmit torque and improve the reliability of the product. The output shaft and the gear frame are integrally formed, which makes it easier to ensure the consistency of the direction association between the special-shaped structure of the output shaft and the limit protrusion, so that the consistency of the valve opening pulse of the product is easier to ensure.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of a stop member of the present invention.

FIG. 3 is a schematic structural diagram of the stop-fitting part of the output gear carrier of the present invention.

FIG. 4 is a schematic diagram of the matching structure of the output gear carrier of the present invention and the fan-shaped protrusion of the stop member.

FIG. 5 is a schematic structural diagram of the valve housing of the present invention.

FIG. 6 is a schematic diagram of the internal structure of the valve housing of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1 to 6, the present invention includes a valve core 1, a valve housing 4, a rotor part 9 and a planetary gear system, the rotor part 9 and the planetary gear system are drive-connected, the valve core 1 is installed in the valve housing 4, and the planetary gear The system is connected with the valve core 1 by transmission, and the rotation of the valve core 1 is driven by the rotor part 9 to realize the opening and closing of the valve port of the valve core 1. A circular installation groove 41 for installing the planetary gear system is formed on the top. The circular installation groove 41 is integrally formed with two pairs of four projections 42 that are oppositely arranged. The planetary gear system is provided with a stopper that is limited by the projections. moving part 5. The planetary gear system includes a gear ring 6 and an output gear carrier 7. The gear ring 6 is welded and fixed in the circular mounting groove 41. The inner side of the gear ring 6 is provided with a tooth portion, and the output gear carrier 7 is arranged in the gear ring 6. The planetary gears of the gear carrier 7 are matched with the teeth of the gear ring 6. The stopper part 5 is arranged below the gear ring 6. The stopper part 5 has an extension part extending between the protrusions 42 in the circumferential direction. The groove bottom of the installation groove is welded and fixed, so as to limit the circumferential rotation of the stop part. Because the protrusion is integrally formed with the bottom of the shell, the torsion force of the stop part is mostly borne by the protrusion. The reliability of the stop part is greatly improved; the top of the stop part 5 is provided with at least two fan-shaped protrusions 51 that protrude upward, and the bottom of the output gear rack 7 extends downward to form limit protrusions located between the fan-shaped protrusions From 71, the limit protrusion can rotate between the fan-shaped protrusions, and when the upper limit protrusion of the gear rack touches the fan-shaped protrusion, the output gear rack stops rotating. The extension portion is welded and fixed to the groove bottom of the circular installation groove 41 . The fan-shaped protrusion 51 limits the rotation range of the output gear carrier to 90°.

Preferably, the planetary gear system is connected to the valve core 1 through the output shaft 11 passing through the central hole of the stop member 5 , the output shaft 11 and the output gear carrier 7 are integrally formed, and the valve core 1 is provided with a special-shaped hole for connecting the output shaft 11 , the bottom of the output shaft 11 is a special-shaped part 112 matched with the special-shaped hole. The output shaft and the output gear carrier are integrally formed, which can reduce the clearance between the output shaft and the output gear carrier, improve the output accuracy of the planetary gear system, thereby improving the quality of the product, and can also eliminate the collision between the two during transmission, further Eliminate product running noise. Since the special-shaped structure of the special-shaped part on the output shaft is matched with the special-shaped hole on the valve core, the valve core through hole and the valve core special-shaped hole are also directionally related, so the special-shaped structure on the output shaft and the valve core through hole also form a direction correlation. In order to ensure the consistency of the pulse required by the valve core from fully closed to the flow of the valve, it is necessary to improve the consistency of the direction correlation between the special-shaped structure of the output shaft and the limit protrusion of the output gear frame. The output shaft and the output gear frame are integrally formed, which makes it easier to ensure the consistency of the direction correlation between the special-shaped structure of the output shaft and the limit protrusion on the output gear frame, thereby making it easier to ensure the consistency of the valve opening pulse of the product.

Further, the valve housing 4 is composed of two cylindrical parts whose center lines are perpendicular to each other. The neck, the through hole and the valve shell are integrally cast, so that the subsequent machining accuracy is relatively easy to ensure, the horizontal cylindrical part forms the valve core accommodating cavity 43 for installing the valve core, and the top of the vertical cylindrical part forms a circular installation groove 41.

Further, the output shaft 11 and the stop member 5 are inserted through the through hole for inserting the output shaft 11 from the inside to the outside, and a positioning seat 111 is provided on the lower outer periphery of the output shaft 11. The components 5 are matched and abutted, so as to realize the movable axial limit of the output shaft. By coaxially installing the output shaft and the stop member, the positional accuracy between the two is ensured, the positional accuracy between the planetary gear system and the output shaft is improved, and the rotation reliability of the planetary gear system is provided.

Further, the planetary gear system is encapsulated by the valve housing 8, and the bottom of the valve housing 8 is fixed with the top of the circular mounting groove 41; the rotor part 9 is arranged above the gear reduction mechanism, and the rotor part 9 is wrapped and installed by the sleeve 10. The tube 10 is fixed to the valve housing 8 .

Claims (9)

1. A stop-type electric valve, comprising a valve core (1), a valve housing (4), a rotor part (9) and a planetary gear system, and the rotor part (9) and the planetary gear system are drive-connected, the valve core (1) Installed in the valve casing (4), the planetary gear system is connected with the valve core (1) in a transmission, and the valve core (1) is driven by the rotor component (9) to rotate to realize the valve core (1). When the valve port is opened and closed, the two sides of the through hole of the valve core are respectively connected to the inlet pipe (2) and the outlet pipe (3), which are characterized in that: A circular installation groove (41) for installing the planetary gear system is formed on the top of the valve housing (4), and a plurality of pairs of oppositely arranged protrusions are integrally formed in the circular installation groove (41). (42), the planetary gear system is provided with a stop member (5) limited by the protrusion. 2. A stop-type electric valve according to claim 1, characterized in that: the planetary gear system comprises a gear ring (6) and an output gear carrier (7), and the gear ring (6) is fixed It is arranged in the circular installation groove (41), the inner surface of the gear ring (6) is provided with a tooth portion, the output gear carrier (7) is arranged in the gear ring (6), and the output gear The planetary gear of the carrier (7) is matched with the tooth portion of the gear ring (6). The stop member (5) is arranged below the gear ring (6). The top of the stop member (5) is provided with at least two fan-shaped protrusions (51) that protrude upward, and the output gear frame (7) ), the bottom of which extends downward and is formed on the limiting protrusions (71) located between the fan-shaped protrusions. 3. A stop-type electric valve according to claim 2, characterized in that: the extension part is fixed by welding with the groove bottom of the circular installation groove (41). 4 . The stop-type electric valve according to claim 3 , wherein the fan-shaped protrusion ( 51 ) limits the rotation range of the output gear rack to 90°. 5 . 5 . A stop type electric valve according to claim 4 , wherein the planetary gear system passes through the central hole of the stop member ( 5 ) through the output shaft ( 11 ) and the The valve core (1) is connected, the output shaft (11) is integrally formed with the output gear frame (7), and the valve core (1) is provided with a special-shaped hole for connecting the output shaft (11). , the bottom of the output shaft (11) is a special-shaped part (112) matched with the special-shaped hole. 6. A stop-type electric valve according to claim 5, characterized in that: the valve shell (4) is composed of two cylindrical parts whose center lines are perpendicular, and the vertical cylindrical parts pass through the neck (4). 44) It is arranged at the middle position of the outer side of the transverse cylindrical member, and the through hole for inserting the output shaft (11) is arranged in the neck portion, and the through hole is integrally cast with the valve shell, and the transverse The cylindrical part forms a valve core accommodating cavity (43) for installing the valve core, and the top of the vertical cylindrical part forms the circular installation groove (41). 7. A stop-type electric valve according to claim 6, characterized in that: the output shaft (11) is threaded through the through hole for piercing the output shaft (11) from the inside to the outside. and the stop member (5), a positioning seat (111) is provided on the lower outer peripheral portion of the output shaft (11), and the top of the positioning seat (111) is in contact with the stop member (5). Cooperate against. 8. A stop-type electric valve according to claim 7, characterized in that: the planetary gear system is encapsulated by a valve casing (8), and the bottom of the valve casing (8) is connected to the circular mounting groove The top of (41) is fitted and fixed; the rotor part (9) is arranged above the gear reduction mechanism, the rotor part (9) is wrapped and installed by a sleeve (10), and the sleeve (10) is fixed to the on the valve housing (8). 9. A stop-type electric valve according to claim 8, characterized in that: the number of the protrusions (42) is two pairs, and the four protrusions are evenly distributed around the circumference and arranged in the circular installation groove (41) Inside.

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