A ball valve

Abstract

The utility model discloses a kind of bullet formula electric ball valve, belong to control valve technical field. Mainly including ball valve body mechanism, control driving mechanism connecting piece;The drive assembly of control driving mechanism includes the spring seat of being provided with first spring base, second spring base, public spring base, public spring base is used to fix public spring, first spring base is used to fix first spring, second spring base is used to fix second spring;Motor is driven end gear through gear set, end gear is fixed with blocking column;Blocking column does circumferential reciprocating motion under the drive of end gear, and alternately extrudes first spring and second spring;End gear is fixedly connected with gear fixed shaft, end gear rotates by the driving of gear fixed shaft below, key shaft is connected with the sealing ball by key connection mode. The utility model structure design simplifies compact, manufacture easily, stable operation, strong anti-interference ability, strong reliability, long service life.

Description

Technical Field

[0001] This utility model relates to an electric ball valve, and more specifically, to a spring-loaded electric ball valve with a simplified and compact structure, easy manufacturing, stable operation, strong anti-interference ability, high reliability, and long service life. Background Technology

[0002] An electric ball valve is a valve device that uses an electric actuator to drive the ball to rotate, thereby opening and closing the valve. It is widely used in industrial automation and fluid control systems.

[0003] Chinese patent publication number CN113833895A discloses an electric ball valve, specifically outlining the following technical solution: It includes a drive unit, a control unit, a transmission component, a valve core ball, and a valve body. The valve core ball is housed within the inner cavity formed by the valve body and has an internal channel. The control unit controls the operation of the drive unit, which transmits output torque to the transmission component. The valve body is provided with at least two flow channels for communication with the outside. The transmission component drives the valve core ball to move, and the flow channels are connected through the internal channel of the valve core ball. The drive unit includes a rotor assembly, which may or may not be connected to one of the flow channels, or may selectively connect or not connect to it. The rotor assembly includes a rotor and a connecting bracket, the rotor and the connecting bracket being integral. The drive unit also includes an isolation sleeve, at least a portion of which is located on the outer periphery of the rotor. The electric ball valve also includes a detection magnetic ring, a shaft, and a first bearing. The detection magnetic ring is sleeved on the outer periphery of the shaft and is limited or fixedly connected to the shaft. The shaft is connected to the transmission component. The detection magnetic ring is located inside the connecting bracket, and the first bearing is located outside the connecting bracket. The transmission component includes a planetary gear assembly, a fixed gear ring, and an output shaft. At least a portion of the fixed gear ring is located in the transmission component receiving portion. The sun gear and the planetary gear assembly are at least a portion located within the fixed gear ring. The fixed gear ring is fixedly or limitedly connected to the connecting seat. The sun gear is drively connected to the planetary gear assembly. The planetary gear assembly is meshed with the fixed gear ring. The planetary gear assembly is connected to the output shaft. The rotor drives the sun gear and the planetary gear assembly to rotate, thereby causing the output shaft to rotate.

[0004] Therefore, it is evident that the traditional electric ball valve has a complex and large structural design, requiring magnetic coupling components such as rotor assemblies and isolation sleeves to achieve dynamic sealing, resulting in high material costs and a complex manufacturing process. Furthermore, magnetic coupling transmission relies on a magnetic field to transmit torque through the isolation sleeve, and its transmission efficiency and operating torque have physical limits. When dealing with high-pressure, high-viscosity, or easily crystallizing media, it is prone to "slippage" (i.e., the rotor rotates while the sealing ball does not), causing the valve to fail to open and close properly, resulting in relatively weak reliability.

[0005] For example, Chinese patent publication number CN213808955U discloses an electric ball valve, specifically disclosing the following technical solution: a valve body assembly, the valve body assembly having a valve cavity; a valve core assembly, the valve core assembly including a valve core movably disposed within the valve cavity; a drive mechanism, the drive mechanism including a drive component and a transmission component, the drive component being connected to the valve core via the transmission component, the drive component being used to drive the transmission component to move, thereby causing the valve core to switch between an open valve position and a closed valve position, the transmission component having a trigger component; and an electronic control board, the electronic control board being electrically connected to the drive mechanism, the electronic control board having a resistance circuit cooperating with the trigger component; when the valve core rotates to the open valve position or the closed valve position, the electronic control board controls the drive component to stop driving according to the received resistance signal. The trigger element includes a first conductive spring and a second conductive spring. The resistance circuit includes a first resistance circuit and a second resistance circuit. The first conductive spring is in contact with the first resistance circuit, and the second conductive spring is in contact with the second resistance circuit. The valve body assembly includes a valve seat and a valve body. The valve body is connected to the valve seat. The valve cavity is located in the valve body. The valve seat has a receiving cavity. The valve seat has a mounting plate on the same side corresponding to the valve cavity and the receiving cavity. The driving element is housed in the receiving cavity. The driving end of the driving element protrudes through the mounting plate. The valve core assembly also includes a valve stem. One end of the valve stem is connected to the valve core, and the other end protrudes through the mounting plate. The transmission assembly is located on the mounting plate. The driving end of the driving element is connected to the valve stem through the transmission assembly. This conventional electric ball valve detects the valve core position by sliding the conductive spring on a fixed resistance circuit. The first and second conductive springs need to maintain physical contact and sliding friction with the first and second resistance circuits at all times.

[0006] First, this type of fixed-resistance circuit is highly susceptible to poor contact or resistance fluctuations due to arc erosion, surface oxidation, and debris or contamination from wear during long-term use. Consequently, the resistance signal received by the control board may be unstable and inaccurate, leading to misjudgments in the control logic, resulting in malfunctions such as premature valve stoppage before the valve core is in position or overload jamming. Its reliability is also relatively poor. Second, the sliding friction mechanical structure inevitably suffers continuous wear; the pressure of the spring gradually weakens, and the coating of the resistance circuit wears through, causing the entire position detection function to fail, resulting in significant shortcomings in lifespan and durability. Furthermore, the structural design of this solution is relatively complex, and the manufacturing process is also relatively difficult. Utility Model Content

[0007] The purpose of this utility model is to address the shortcomings of existing technologies by providing a spring-loaded electric ball valve with a simplified and compact structural design, easy manufacturing, stable operation, strong anti-interference ability, high reliability, and long service life.

[0008] This utility model is achieved through the following technical solution: A spring-loaded electric ball valve includes a ball valve body mechanism, a control and drive mechanism, and a connector connecting the ball valve body mechanism and the control and drive mechanism. The ball valve body mechanism includes a valve body with a flow channel, and a sealing ball with a ball valve through hole is placed inside the valve body. The control and drive mechanism includes a drive assembly housed in a drive housing. The drive assembly drives the sealing ball through a key shaft that is sealed to the inner wall of the valve body connection section. The drive assembly includes a lower fixed plate fixedly connected to the bottom pressure plate of the drive housing, and a spring seat with a first spring base, a second spring base, and a common spring base is fixedly connected to the lower fixed plate. The common spring base is used to fix and install a common spring with two fixed contacts; the first spring base is used to fix and install a first spring, the first spring is positioned opposite to and spaced apart from one of the fixed contacts, and the first spring is electrically connected to the PCBA board; the second spring base is used to fix and install a second spring, the second spring is positioned opposite to and spaced apart from the other fixed contact, and the second spring is also electrically connected to the PCBA board. The upper part of the spring holder is covered by an upper fixing plate fixedly connected to it; a gear set is installed in the accommodating space formed by the lower fixing plate, the spring holder, and the upper fixing plate. A motor fixedly supported on the upper fixing plate drives the end gear through the gear set. A stop post is fixedly provided on the end gear; the stop post performs circumferential reciprocating motion under the drive of the end gear, and alternately squeezes the first spring and the second spring; the end gear is fixedly connected to the gear fixing shaft, and the end gear drives the key shaft below to rotate through the gear fixing shaft. The key shaft is connected to the sealing ball through a key connection.

[0009] Preferably, the common spring is arc-shaped, with its two ends folded outward to form the fixed contact point.

[0010] Preferably, the PCBA board is an external circuit board; a common spring is electrically connected to the PCBA board via a first wire, a first spring is electrically connected to the PCBA board via a second wire, and a second spring is electrically connected to the PCBA board via a third wire.

[0011] Preferably, the end gear is supported by a bushing fixed to the lower fixed plate, and the inner ring of the bushing is in clearance fit with the gear fixing shaft.

[0012] Preferably, the key shaft body has multiple spaced annular grooves along the axial direction, and each annular groove contains a sealing ring; wherein the upper surface of the sealing ring at the top is in contact with the top surface of the inner wall of the connector.

[0013] Preferably, the connector and the valve body connection section are fixedly connected by an internal and external threaded connection; the upper end of the connector is fixedly connected to the bottom pressure plate by welding.

[0014] Preferably, a wear-resistant sealing ring that mates with the sealing ball is provided around the inner wall of the channel opening of the flow channel.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention employs a stroke control mechanism based on mechanical on / off contacts as the position signal generator. Structurally, this invention significantly simplifies the electric ball valve drive assembly, making it more compact and effectively saving installation space. It is also easier to manufacture, significantly reducing product manufacturing costs. In terms of performance, this invention is less susceptible to environmental interference, provides stable on / off signals, and has strong anti-interference capabilities, fundamentally eliminating the "slippage" risk of traditional magnetic coupling drives.

[0016] The spring and the fixed contact of this invention only make brief physical contact at the moment of triggering, and are in a separated state for most of the time. This "instant contact" mode makes mechanical wear and electrical loss extremely low, thereby ensuring the high reliability, durability and long service life of the product. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model from the front view.

[0019] Figure 3 This is a cross-sectional view of the structure of this utility model.

[0020] Figure 4 This is a utility model Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 This is a schematic diagram of the structure of the common spring, the first spring, and the second spring of this utility model.

[0022] Figure 6 This is a utility model Figure 5 Schematic diagram of three-dimensional structure.

[0023] In the diagram: 1. Ball valve body mechanism; 11. Valve body; 111. Flow passage; 112. Valve body connecting section; 113. Wear-resistant sealing ring; 12. Sealing ball; 121. Ball valve through hole; 2. Control drive mechanism; 21. Drive housing; 211. Bottom pressure plate; 22. Drive assembly; 221. Lower fixed plate; 222. Spring holder; 2221. First spring base; 2222. Second spring base; 2223. Common spring base; 223. Upper fixed plate; 2241. Gear set; 2242. End gear; 2243. Gear fixed shaft; 2244. Stop post; 225. Motor; 226. Common spring; 2261. Fixed contact; 2271. First spring; 2272. Second spring; 228. Bushing; 23. Key shaft; 231. Sealing ring; 232. Key shaft body; 3. Connectors. Detailed Implementation

[0024] To enable readers to better understand the design intent of this utility model, the technical solution described below is further described in conjunction with embodiments. It should be noted that directional terms that may appear in the following paragraphs, including but not limited to "up," "down," "left," "right," "front," and "back," are based on the visual orientation shown in the accompanying drawings and should not be considered as limitations on the scope of protection or technical solution of this utility model. Their purpose is solely to facilitate a better understanding of the technical solution described in this utility model by those skilled in the art.

[0025] In this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Example 1

[0027] like Figures 1 to 6A spring-loaded electric ball valve includes a ball valve body mechanism 1, a control drive mechanism 2, and a connecting member 3 connecting the ball valve body mechanism 1 and the control drive mechanism 2. The ball valve body mechanism 1 includes a valve body 11 with a flow channel 111, and a sealing ball 12 with a ball valve through-hole 121 is housed within the valve body 11. The control drive mechanism 2 includes a drive assembly 22 housed within a drive housing 21, which drives the sealing ball 12 via a key shaft 23 that is sealed to the inner wall of the valve body connecting section 112. The drive assembly 22 includes a lower fixing plate 221 fixedly connected to a bottom pressure plate 211 of the drive housing 21, and a spring seat 222, which is provided with a first spring seat 2221, a second spring seat 2222, and a common spring seat 2223, is fixedly connected to the lower fixing plate 221. In this embodiment, the spring holder 222 is made of engineering plastic and is integrally molded using injection molding. Its structure includes a first spring base 2221, a second spring base 2222, and a common spring base 2223. The common spring base 2223 is used to fix a common spring 226 with two fixed contacts 2261. The common spring 226 is fixed within the common spring base 2223 using an insert injection molding process. The first spring base 2221 is used to fix a first spring 2271, which is also fixed within the first spring base 2221 using an insert injection molding process. The first spring 2271 is positioned opposite to and spaced apart from one of the fixed contacts 2261, and is electrically connected to the PCBA board. The second spring base 2222 is used to fix the second spring 2272. The second spring 2272 is also fixed in the second spring base 2222 by insert injection molding process. The second spring 2272 is positioned opposite to and spaced apart from the other fixed contact 2261. The second spring 2272 is also electrically connected to the PCBA board. In this embodiment, the upper part of the spring plate seat 222 is covered by an upper fixing plate 223 fixedly connected to it; a gear set 2241 is installed in the accommodating space formed by the lower fixing plate 221, the spring plate seat 222, and the upper fixing plate 223. The motor 225, which is fixedly supported on the upper fixing plate 223, drives the end gear 2242 through the gear set 2241. A stop post 2244 is fixedly provided on the end gear 2242. The stop post 2244 performs circumferential reciprocating motion under the drive of the end gear 2242 and alternately squeezes the first spring plate 2271 and the second spring plate 2272. The end gear 2242 is fixedly connected to the gear fixing shaft 2243. The end gear 2242 drives the key shaft 23 below to rotate through the gear fixing shaft 2243. The key shaft 23 is connected to the sealing ball 12 through a key connection.

[0028] Assuming that the valve body 11 has two flow channels 111, one inlet and one outlet, there are two extreme positions in this embodiment. When the ball valve through hole 121 of the sealing ball 12 is completely coaxial with the flow channel 111, the electric ball valve is in the "fully open" extreme position; when the non-through hole surface of the sealing ball 12 completely blocks the flow channel 111, the electric ball valve is in the "fully closed" extreme position.

[0029] The operation process in this embodiment is as follows: After receiving the start signal, the motor 225 starts to rotate, and drives the end gear 2242 to rotate through the gear set 2241 connected to it. The stop post 2244 fixed on the end gear 2242 then moves circumferentially.

[0030] When the motor 225 rotates in the first direction, the stop post 2244 rotates with the end gear 2242, and its trajectory gradually approaches and eventually presses against the first spring piece 2271. Under the pressure of the stop post 2244, the first spring piece 2271 undergoes elastic deformation until it contacts one of the fixed contacts 2261. At this time, the first spring piece 2271 and the common spring piece 226 form an electrical circuit. After detecting the electrical signal generated by this circuit, the PCBA board immediately controls the motor 225 to be de-energized. At this point, the electric ball valve in this embodiment reaches its first limit position.

[0031] When motor 225 rotates in the second reverse direction, opposite to the first direction, the stop post 2244 rotates in the opposite direction with the end gear 2242. Its trajectory gradually approaches and compresses the second spring 2272. Under compression, the second spring 2272 undergoes elastic deformation until it contacts another fixed contact 2261, thus forming an electrical circuit with the common spring 226. After detecting the electrical signal generated by this circuit, the PCBA board controls the motor 225 to be de-energized. At this time, the electric ball valve reaches the second limit position. In this way, the valve opening and closing functions are realized.

[0032] This embodiment uses a stroke control mechanism based on mechanical on / off contacts as the position signal generator. Structurally, this invention significantly simplifies the electric ball valve drive assembly, making it more compact and effectively saving installation space. It is also easier to manufacture, significantly reducing product manufacturing costs. In terms of performance, this invention is less susceptible to environmental interference, provides stable on / off signals, and has strong anti-interference capabilities, fundamentally eliminating the "slippage" risk of traditional magnetic coupling drives. In this embodiment, the spring and fixed contact only have brief physical contact at the moment of triggering, remaining separated for the vast majority of the time. This "instantaneous contact" mode results in extremely low mechanical wear and electrical losses, thus ensuring high reliability, durability, and a long service life for the product.

[0033] Example 2

[0034] Based on Embodiment 1, this embodiment continues to describe in detail the technical features involved therein and the functions and roles of these technical features in this utility model, so as to help those skilled in the art to fully understand the technical solution of this utility model and reproduce it.

[0035] like Figure 5 , Figure 6 As shown, in this embodiment, the common spring 226 is arc-shaped, with its two ends folded outward to form fixed contacts 2261. In addition to the insert injection molding fixing method, in this embodiment, the common spring 226 can also be fixed in the common spring base 2223 by snap-fit. Similarly, the first spring 2271 and the second spring 2272 can be fixed in the first spring base 2221 and the second spring base 2222 respectively by snap-fit.

[0036] In this embodiment, the PCBA board is an external circuit board. The common spring contact 226 is electrically connected to the PCBA board via wire one, the first spring contact 2271 is electrically connected to the PCBA board via wire two, and the second spring contact 2272 is electrically connected to the PCBA board via wire three.

[0037] In this embodiment, the end gear 2242 is supported by a bushing 228 fixed to the lower fixed plate 221, and the inner ring of the bushing 228 is clearance-fitted with the gear fixing shaft 2243. The structural design of the bushing 228 makes the drive assembly 22 run more stably and accurately.

[0038] like Figure 3 , Figure 4 As shown, the key shaft body 232 of the key shaft 23 has multiple spaced annular grooves along the axial direction, and each annular groove accommodates a sealing ring 231. The sealing ring 231 is compressed and deformed within the annular groove, thereby forming a sealing effect. The multiple sealing rings 231 design can achieve a good sealing effect. The upper surface of the sealing ring 231 at the top is in contact with the top surface of the inner wall of the connector 3, thus further improving the sealing performance of the product. The O-ring is made of a wear-resistant and chemically resistant elastic material, such as hydrogenated nitrile rubber (HNBR), fluororubber (FKM), or ethylene propylene diene monomer (EPDM).

[0039] In this embodiment, the connector 3 and the valve body connecting section 112 are fixedly connected by an internal and external thread connection; the upper end of the connector 3 is fixedly connected to the bottom pressure plate 211 by welding.

[0040] In this embodiment, a wear-resistant sealing ring 113 that mates with the sealing ball 12 is provided around the inner wall of the channel opening of the flow channel 111. The wear-resistant sealing ring 113 is made of a material with a low coefficient of friction, wear resistance, and chemical corrosion resistance, such as polytetrafluoroethylene, polyoxymethylene (POM), or ultra-high molecular weight polyethylene (UHMWPE) and other engineering plastics.

[0041] In summary, this is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made in accordance with the shape, structure, features and spirit of the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A spring-loaded electric ball valve, comprising a ball valve body mechanism (1), a control drive mechanism (2), and a connector (3) connecting the ball valve body mechanism (1) and the control drive mechanism (2); the ball valve body mechanism (1) comprises a valve body (11) having a flow channel (111), and a sealing ball (12) with a ball valve through hole (121) is disposed within the valve body (11); the control drive mechanism (2) comprises a drive assembly (22) housed within a drive housing (21), the drive assembly (22) driving the sealing ball (12) via a key shaft (23) that is sealed to the inner wall of the valve body connecting section (112), characterized in that: The drive assembly (22) includes a lower fixing plate (221) fixedly connected to the bottom pressure plate (211) of the drive housing (21), and a spring seat (222) provided with a first spring seat (2221), a second spring seat (2222), and a common spring seat (2223) fixedly connected to the lower fixing plate (221); The common spring base (2223) is used to fix and install a common spring (226) with two fixed contacts (2261); the first spring base (2221) is used to fix and install a first spring (2271), the first spring (2271) is positioned opposite to and spaced apart from one of the fixed contacts (2261), and the first spring (2271) is electrically connected to the PCBA board; the second spring base (2222) is used to fix and install a second spring (2272), the second spring (2272) is positioned opposite to and spaced apart from the other fixed contact (2261), and the second spring (2272) is also electrically connected to the PCBA board; The upper part of the spring plate seat (222) is covered by an upper fixing plate (223) fixedly connected to it; a gear set (2241) is installed in the accommodating space formed by the lower fixing plate (221), the spring plate seat (222), and the upper fixing plate (223). The motor (225) fixedly supported on the upper fixing plate (223) drives the end gear (2242) through the gear set (2241). A stop post (2244) is fixedly provided on the end gear (2242). The stop post (2244) performs circumferential reciprocating motion under the drive of the end gear (2242) and alternately squeezes the first spring plate (2271) and the second spring plate (2272). The end gear (2242) is fixedly connected to the gear fixing shaft (2243). The end gear (2242) drives the key shaft (23) below to rotate through the gear fixing shaft (2243). The key shaft (23) is connected to the sealing ball (12) through a key connection.

2. The spring-loaded electric ball valve according to claim 1, characterized in that: The common spring (226) is arc-shaped, with its two ends folded outward to form the fixed contact (2261).

3. The spring-loaded electric ball valve according to claim 1, characterized in that: The PCBA board is an external circuit board; the common spring (226) is electrically connected to the PCBA board via wire one, the first spring (2271) is electrically connected to the PCBA board via wire two, and the second spring (2272) is electrically connected to the PCBA board via wire three.

4. The spring-loaded electric ball valve according to claim 1, characterized in that: The end gear (2242) is supported by a bushing (228) fixed to the lower fixed plate (221), and the inner ring of the bushing (228) is clearance-fitted with the gear fixing shaft (2243).

5. A spring-loaded electric ball valve according to claim 1, characterized in that: The key shaft body (232) of the key shaft (23) has multiple spaced annular grooves along the axial direction, and each annular groove contains a sealing ring (231); wherein the upper surface of the sealing ring (231) at the top is in contact with the top surface of the inner wall of the connector (3).

6. A spring-loaded electric ball valve according to claim 5, characterized in that: The connector (3) is fixedly connected to the valve body connection section (112) by means of internal and external thread; the upper end of the connector (3) is fixedly connected to the bottom pressure plate (211) by means of welding.

7. A spring-loaded electric ball valve according to claim 1, characterized in that: A wear-resistant sealing ring (113) that mates with the sealing ball (12) is provided around the inner wall of the channel opening of the flow channel (111).

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