Valve structure, gate valve and electronic expansion valve

Abstract

The utility model relates to the technical field of valves, in particular to a valve structure, a gate valve and an electronic expansion valve. The valve structure comprises a valve body assembly, a rotor assembly, a valve rod and a valve element assembly, the rotor assembly is provided with a driving hole, one end of the valve rod penetrates through the driving hole and is connected with the rotor assembly, the other end of the valve rod is connected with the valve element assembly, and the rotor assembly can drive the valve rod to rotate and drive the valve element assembly to move in the axial direction. Wherein a locking groove is formed in the inner wall of the driving hole, a containing hole is formed in the valve rod, a locking assembly is movably installed in the containing hole, and the locking assembly can be clamped into the locking groove, so that the rotor assembly can drive the valve rod to rotate through the locking assembly. The valve structure has a fully-closed state, in the fully-closed state, the valve element assembly cuts off communication between the first circulation opening and the second circulation opening, and the locking assembly can relieve clamping connection with the locking groove. According to the valve structure, the gate valve and the electronic expansion valve, the problem that an internal thread structure and an external thread structure are blocked due to an existing axial stopping mode is solved.

Description

Valve structure, gate valve and electronic expansion valve Technical Field

[0001] This application relates to the field of valve technology, and in particular to a valve structure, a gate valve, and an electronic expansion valve. Background Technology

[0002] Air conditioning systems often incorporate valve structures to control fluid flow and meet various operational requirements. The valve stem and related components are connected by a threaded drive, and the rotor drives the valve stem to rotate, which in turn moves the valve core axially.

[0003] In related technologies, some valve structures use axial stops to limit the valve core after it moves to a predetermined position. However, after the valve core is stopped axially, the rotor will still drive the valve stem to continue rotating. This can easily lead to increased friction between the internal and external threads, causing the structure to jam and resulting in damage to the valve structure. Summary of the Invention

[0004] Therefore, it is necessary to provide a valve structure, gate valve, and electronic expansion valve to solve the problem that existing axial stop methods can cause the internal and external thread structures to jam.

[0005] This application provides a valve structure including a valve body assembly, a rotor assembly, a valve stem, and a valve core assembly. The rotor assembly, valve stem, and valve core assembly are all installed within the valve body assembly. The rotor assembly has a drive hole, one end of the valve stem passes through the drive hole and is connected to the rotor assembly, and the other end is connected to the valve core assembly. The rotor assembly can drive the valve stem to rotate and move the valve core assembly axially. The inner wall of the drive hole has a locking groove, and the valve stem has a receiving hole. A locking assembly is movably installed in the receiving hole, and the locking assembly can engage with the locking groove, allowing the rotor assembly to drive the valve stem to rotate synchronously via the locking assembly. The valve structure has a fully closed state, and in this fully closed state, the locking assembly can disengage from the locking groove, allowing the rotor assembly and valve stem to rotate relative to each other.

[0006] In one embodiment, the locking assembly includes an elastic element and a locking element, one end of the elastic element being connected to the locking element to apply a force to the locking element toward moving towards the locking groove.

[0007] In one embodiment, the locking groove is configured as a toothed groove, and the side wall of the locking member on the toothed groove along the valve opening direction of the valve structure is defined as the first side wall, and the side wall of the locking member on the toothed groove along the valve closing direction of the valve structure is defined as the second side wall; the inclination angle of the first side wall is Q1, and the inclination angle of the second side wall is Q2, wherein Q1 > Q2.

[0008] In one embodiment, the locking groove is configured as a toothed groove. The side wall of the locking member on the toothed groove along the valve opening direction of the valve structure is defined as the first side wall, and the side wall of the locking member on the toothed groove along the valve closing direction of the valve structure is defined as the second side wall. The circumferential resistance experienced by the valve stem in the fully closed state is defined as F1, the circumferential resistance exerted on the locking member by the first side wall when rotating in the valve opening direction is defined as F2, the circumferential resistance exerted on the locking member by the second side wall when rotating in the valve closing direction is defined as F3, and the circumferential resistance experienced by the valve stem during the valve opening or closing process is defined as F4. Wherein, F1≥F3, F2>F4, F3>F4.

[0009] In one embodiment, the locking element is spherically shaped.

[0010] In one embodiment, the valve body assembly has an abutment portion located at the end of the valve core assembly away from the valve stem, and in the fully closed state, the end of the valve core assembly away from the valve stem abuts against the abutment portion.

[0011] In one embodiment, the valve body assembly has a flow cavity, the inner wall of which protrudes toward its own axis to form the abutment portion; or, the abutment portion includes an elastic element and a gasket, one end of the elastic element is connected to the valve body assembly, and the other end is connected to the gasket, and in the fully closed state, the valve core assembly abuts against the gasket and compresses the elastic element.

[0012] In one embodiment, the valve core assembly includes a valve head and a nut sleeve, the nut sleeve being disposed at one end of the valve head, and the end of the valve stem away from the rotor assembly being inserted into the nut sleeve and threadedly connected to the nut sleeve.

[0013] In one embodiment, the valve body assembly has a limiting hole, and the end of the nut sleeve away from the valve head is movably inserted into the limiting hole; wherein, the outer side wall of the nut sleeve is provided with a first anti-rotation part, and the inner wall of the limiting hole is provided with a second anti-rotation part, the first anti-rotation part and the second anti-rotation part are connected to prevent the nut sleeve from rotating relative to the limiting hole.

[0014] In one embodiment, both the first anti-rotation portion and the second anti-rotation portion are configured as anti-rotation surfaces.

[0015] In one embodiment, the valve structure further includes a rotary bearing mounted within the valve body assembly, with the outer ring of the rotary bearing connected to the valve body assembly and the inner ring of the rotary bearing connected to the valve stem, such that the rotary bearing can prevent axial movement of the valve stem relative to the valve body assembly.

[0016] In one embodiment, the valve stem has a protruding portion on its outer periphery, and the valve structure also includes a mating portion. The protruding portion and the mating portion are respectively disposed at opposite ends of the rotating bearing along its own axial direction, and the mating portion is sleeved and connected to the valve stem so that the protruding portion and the mating portion can cooperate to clamp the inner ring of the rotating bearing.

[0017] In one embodiment, the valve body assembly has a flow cavity, a first flow port, and a second flow port; the first flow port and the second flow port are spaced apart axially in the valve body assembly, and in the fully closed state, the valve core assembly is blocked in one of the first flow port and the second flow port, and the other of the first flow port and the second flow port is in communication with the flow cavity.

[0018] In one embodiment, the portions of the flow cavity located on opposite sides of the valve core assembly along the axial direction are defined as a first cavity and a second cavity, respectively. A balance channel is provided on the valve core assembly, and the two ends of the balance channel are respectively connected to the first cavity and the second cavity.

[0019] This application also provides a gate valve, which includes a valve body assembly, a rotor assembly, a valve stem, and a valve core assembly. The rotor assembly, the valve stem, and the valve core assembly are all installed within the valve body assembly. The rotor assembly has a drive hole, one end of the valve stem passes through the drive hole and is connected to the rotor assembly, and the other end is connected to the valve core assembly. The rotor assembly can drive the valve stem to rotate and cause the valve core assembly to move axially. The inner wall of the drive hole is provided with a locking groove, and the valve stem has a receiving hole. A locking assembly is movably installed in the receiving hole, and the locking assembly can engage with the locking groove so that the rotor assembly can drive the valve stem to rotate synchronously through the locking assembly. The gate valve has a fully closed state, and in the fully closed state, the locking assembly can disengage from the locking groove so that the rotor assembly and the valve stem can rotate relative to each other.

[0020] This application also provides an electronic expansion valve, which includes a valve body assembly, a rotor assembly, a valve stem, and a valve core assembly. The rotor assembly, the valve stem, and the valve core assembly are all installed within the valve body assembly. The rotor assembly has a drive hole, one end of the valve stem passes through the drive hole and is connected to the rotor assembly, and the other end is connected to the valve core assembly. The rotor assembly can drive the valve stem to rotate and move the valve core assembly axially. The inner wall of the drive hole is provided with a locking groove, and the valve stem has a receiving hole. A locking assembly is movably installed in the receiving hole, and the locking assembly can engage with the locking groove so that the rotor assembly can drive the valve stem to rotate synchronously through the locking assembly. The gate valve has a fully closed state, and in the fully closed state, the locking assembly can disengage from the locking groove so that the rotor assembly and the valve stem can rotate relative to each other.

[0021] Compared with existing technologies, the valve structure, gate valve, and electronic expansion valve provided in this application, during the valve closing process, allow the locking component mounted on the valve stem to engage with the locking groove. This enables the rotor assembly to rotate, driving the valve stem to rotate via the locking component, thus allowing the valve core assembly to move axially. When the valve structure is fully closed, the locking component disengages from the locking groove, causing the rotor assembly to idle without driving the valve stem to continue rotating. This maintains a relatively stable valve stem, effectively preventing the axial stop that increases friction between the valve stem and the corresponding threaded joint, leading to jamming, as is common in traditional structures. This improves the service life of the valve structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a cross-sectional view of a gate valve according to an embodiment of this application;

[0024] Figure 2 is a cross-sectional view of a gate valve according to another embodiment of this application;

[0025] Figure 3 is a schematic diagram of the rotor assembly and valve stem assembly according to an embodiment of this application;

[0026] Figure 4 is a schematic diagram of the cooperation between the rotor assembly and the valve stem during valve opening according to an embodiment of this application;

[0027] Figure 5 is a schematic diagram of the rotor assembly and valve stem in the fully closed state according to an embodiment of this application;

[0028] Figure 6 is a schematic diagram of the structure of a limiting sleeve according to an embodiment of this application;

[0029] Figure 7 is a schematic diagram of the structure of a nut sleeve according to an embodiment of this application;

[0030] Figure 8 is a cross-sectional view of a gate valve according to an embodiment of this application;

[0031] Figure 9 is a cross-sectional view of a gate valve according to an embodiment of this application;

[0032] Figure 10 is a cross-sectional view of an electronic expansion valve according to an embodiment of this application.

[0033] The symbols in the diagram represent the following meanings:

[0034] 100. Valve structure; 10. Valve body assembly; 101. Flow chamber; 1011. First chamber; 1012. Second chamber; 102. First flow port; 103. Second flow port; 104. Limiting hole; 11. Valve seat; 111. First limiting part; 112. Main body; 113. Connecting sleeve; 1131. Connecting boss; 12. Limiting sleeve; 121. Second anti-rotation part; 122. Second limiting part; 13. Bearing seat; 14. First connecting pipe; 141. First connecting part; 142. First transition part; 15. Second connecting pipe; 151. Second connecting part; 152. Second transition part; 16. 161. Abutment part; 162. Elastic element; 20. Gasket; 20. Valve stem; 201. Receiving hole; 21. Locking assembly; 211. Elastic element; 212. Locking element; 22. Rotary bearing; 23. Protrusion; 24. Fitting part; 30. Valve core assembly; 301. Balance channel; 31. Valve head; 311. First seal; 312. Second seal; 32. Nut sleeve; 321. First anti-rotation part; 40. Rotor assembly; 401. Drive hole; 402. Locking groove; 4021. First side wall; 4022. Second side wall; 50. Guide sleeve; 60. Valve port; 70. Nut seat. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0040] Please refer to Figures 1-10. This application provides a valve structure 100, which can be a gate valve as shown in Figure 1 or an electronic expansion valve as shown in Figure 10. For ease of explanation, this application specifically uses a gate valve as an example for the description of valve structure 100. Valve structure 100 includes a valve body assembly 10, a rotor assembly 40, a valve stem 20, and a valve core assembly 30. The rotor assembly 40, valve stem 20, and valve core assembly 30 are all installed within the valve body assembly 10. Specifically, the valve body assembly 10 has a flow cavity 101 and a first flow port 102 and a second flow port 103 communicating with the flow cavity 101. The valve core assembly 30 is movably installed within the flow cavity 101.

[0041] The valve structure 100 has a fully open state and a fully closed state. When the valve structure 100 is in the fully open state, the first flow port 102 and the second flow port 103 can be connected through the flow cavity 101. When the valve structure 100 is in the fully closed state, the valve core assembly 30 can reduce or block the flow of fluid between the first flow port 102 and the second flow port 103. The valve structure 100 also includes a first connecting pipe 14 and a second connecting pipe 15. The first connecting pipe 14 is inserted into the first flow port 102 and communicates with the flow cavity 101, and the second connecting pipe 15 is inserted into the second flow port 103 and communicates with the flow cavity 101.

[0042] Furthermore, the rotor assembly 40 has a drive hole 401. One end of the valve stem 20 passes through the drive hole 401 and is connected to the rotor assembly 40, while the other end is connected to the valve core assembly 30. The rotor assembly 40 can drive the valve stem 20 to rotate and cause the valve core assembly 30 to move axially. Here, the valve stem 20 and the valve core assembly 30 can be threaded together to convert the circumferential rotation of the valve stem 20 into the axial movement of the valve core assembly 30. The inner wall of the drive hole 401 is provided with a locking groove 402, and the valve stem 20 has a receiving hole 201. A locking component 21 is movably installed in the receiving hole 201, and the locking component 21 can be engaged with the locking groove 402 so that the rotor assembly 40 can drive the valve stem 20 to rotate synchronously through the locking component 21. In the fully closed state, the locking component 21 can disengage from the locking groove 402, so that the rotor assembly 40 and the valve stem 20 can rotate relative to each other.

[0043] Understandably, during the valve closing process of valve structure 100, the locking component 21 installed on valve stem 20 can engage with locking groove 402. Therefore, when rotor assembly 40 rotates, it can drive valve stem 20 to rotate via locking component 21, thereby allowing valve core assembly 30 to move axially. When valve structure 100 is in the fully closed state, locking component 21 can disengage from locking groove 402, causing rotor assembly 40 to idle without driving valve stem 20 to continue rotating. Thus, valve stem 20 can maintain a relatively stable state, effectively avoiding the situation in traditional structures where axial blocking increases the friction between the valve stem 20 and the corresponding threaded mating structure, leading to structural jamming. This improves the service life of valve structure 100.

[0044] That is, the valve structure 100, such as the gate valve or electronic expansion valve in this application, can realize the free rotation of the rotor assembly 40 through the locking component 21, thereby preventing jamming. Its specific structure can be appropriately changed.

[0045] Typically, the rotor assembly 40 can drive the valve stem 20 to rotate clockwise to close the valve, and drive the valve stem 20 to rotate counterclockwise to open the valve. Of course, it can be reasonably configured according to actual needs, and no further restrictions are imposed here.

[0046] In one embodiment, as shown in FIG3, the locking assembly 21 includes an elastic member 211 and a locking member 212. One end of the elastic member 211 is connected to the locking member 212 to apply a force to the locking member 212 toward moving towards the locking groove 402. Thus, the locking assembly 21 has a simple structure, which can reduce costs, and the locking assembly 21 can be automatically moved by cooperating with the locking groove 402.

[0047] In one embodiment, the locking member 212 is spherically shaped, which facilitates the engagement of the locking member 212 with the first sidewall 4021 and the second sidewall 4022. For example, the locking member 212 can be made of steel ball, which has a simple structure and is also less expensive.

[0048] In one embodiment, as shown in Figures 3-5, the locking groove 402 is configured as a toothed groove, and the side wall of the toothed groove that applies force to the locking member 212 along the valve opening direction of the valve structure 100 is defined as the first side wall 4021, and the side wall of the toothed groove that applies force to the locking member 212 along the valve closing direction of the valve structure 100 is defined as the second side wall 4022. Here, this embodiment is described using clockwise as the valve closing direction and counterclockwise as the valve opening direction as an example, wherein Figures 3-5 are all top views.

[0049] To achieve automatic movement of the locking assembly 21 driven by the locking groove 402, in a specific embodiment of this application, the inclination angle of the first sidewall 4021 is Q1, and the inclination angle of the second sidewall 4022 is Q2, where Q1 > Q2. It is easy to understand that the force required for the locking assembly 21 to release from the locking groove 402 is constant; that is, the force required for the locking member 212 to overcome the elastic force of the elastic member 211 and press into the receiving hole 201 is constant. In this embodiment, the locking groove 402 is toothed. The force applied to the locking member 212 by the sidewalls along which the rotor assembly 40 rotates when the valve is open and closed differs. Therefore, by reasonably setting the inclination angles of the first sidewall 4021 and the second sidewall 4022, the rotor assembly 40 can be made to idle in the fully closed state, and can rotate smoothly to achieve valve opening and closing.

[0050] It should be noted that a plane perpendicular to the axis of valve stem 20 is defined as the projection plane. Here, the inclination angle of the first side wall 4021 and the second side wall 4022 can be regarded as the angle formed by a straight line perpendicular to the axis of the receiving hole 201 and located in the projection plane intersecting the first side wall 4021 and the second side wall 4022 respectively.

[0051] In another embodiment, the circumferential resistance experienced by the valve stem 20 in the fully closed state is defined as F1, the circumferential resistance exerted on the locking member 212 by the first sidewall 4021 when rotating in the valve opening direction is defined as F2, the circumferential resistance exerted on the locking member 212 by the second sidewall 4022 when rotating in the valve closing direction is defined as F3, and the circumferential resistance experienced by the valve stem 20 during the valve opening or closing process is defined as F4, wherein F1≥F3, F2>F4, and F3>F4.

[0052] It should be noted that the circumferential resistance F2 exerted on the locking member 212 by the first sidewall 4021 when rotating in the valve-opening direction is the driving force that drives the locking member 212 and valve stem 20 to move during the rotation of the rotor assembly 40 in the valve-opening direction. Similarly, the circumferential resistance F3 exerted on the locking member 212 by the second sidewall 4022 when rotating in the valve-closing direction is the driving force that drives the locking member 212 and valve stem 20 to move during the rotation of the rotor assembly 40 in the valve-closing direction. Furthermore, as shown in Figures 4 and 5, the force exerted by the elastic member 211 on the locking member 212 can be defined as F, the angle between the direction of the force exerted by the elastic member 211 on the locking member 212 and the direction of the second sidewall 4022 is Q, the rolling friction coefficient of the locking member 212 is μ, and the radius of the locking member 212 is r. Where F2 = F × cos(Q) × cos(90° - Q), and F3 = μ × F × r. In addition, the circumferential resistance F4 experienced by the valve stem 20 during the opening or closing process is the force exerted on the valve stem 20 by the inner wall of the flow cavity 101 through the valve core assembly 30.

[0053] It is understandable that when the valve stem 20 drives the valve core assembly 30 to move axially via the thread, the force between the valve core assembly 30 and the valve body assembly 10 is transformed into a circumferential frictional force between the valve stem 20 and the valve core assembly 30. This frictional force is the resistance that the rotor assembly 40 needs to overcome to drive the valve stem 20 to rotate. In this embodiment, the magnitude of this frictional force varies depending on the state of the valve core assembly 30. Here, the circumferential frictional force experienced by the valve stem 20 in the fully closed state can be set to be greater than the circumferential frictional force experienced by the valve stem 20 during the opening or closing process, i.e., F1 > F4, thereby achieving a change in the force.

[0054] Based on this, during the valve closing process, F3 can be set to be greater than F4, thereby ensuring that the driving force F3 of the rotor assembly 40 can overcome the resistance F4 of the valve stem 20 when the valve is closed, and ensuring that the valve stem 20 and the valve core assembly 30 can smoothly carry out threaded transmission. When the valve core assembly 30 moves to the fully closed position, the resistance to the continued axial movement of the valve core assembly 30 is increased, thereby increasing the friction between the valve stem 20 and the valve core assembly 30, making F1≥F3. At this time, the driving force F3 of the rotor assembly 40 cannot overcome the resistance F1 of the valve stem 20 to drive the valve stem 20 to rotate. Since the rotor assembly 40 will continue to rotate for a period of time, while the valve stem 20 will not rotate, the force exerted by the rotor assembly 40 and the valve stem 20 as a whole on the valve core assembly 30 will be transformed into the force between the rotor assembly 40 and the valve stem 20. This causes the force to be applied to the locking member 212, so that the locking member 212 can overcome the elastic force of the elastic member 211 and enter the receiving hole 201, thereby realizing the idling of the rotor assembly 40 in the fully closed state. When the rotor assembly 40 rotates from the fully closed state toward the valve opening direction, by setting F2 > F4, that is, the driving force F2 of the rotor assembly 40 when opening the valve can overcome the resistance F4 of the valve stem 20. Therefore, there is no tendency for the rotor assembly 40 and the valve stem 20 to rotate relative to each other, ensuring that the valve stem 20 and the valve core assembly 30 can smoothly carry out threaded transmission and realize valve opening.

[0055] To achieve an axial lower stop when the valve core assembly 30 is fully closed and increase the resistance to continued axial movement of the valve core assembly 30 in the fully closed state, in one embodiment, an abutment portion 16 is provided within the valve body assembly 10. The abutment portion 16 is located at the end of the valve core assembly 30 away from the valve stem 20, and in the fully closed state, the end of the valve core assembly 30 away from the valve stem 20 abuts against the abutment portion 16. Thus, by providing the abutment portion 16 to restrict the continued movement of the valve core assembly 30 in the valve-closing direction, the abutment portion 16 can provide a counter-pressure to the valve core assembly 30 and the valve stem 20. This is converted into circumferential friction between the valve core assembly 30 and the valve stem 20, thereby realizing the change in force between the valve core assembly 30 and the valve stem 20 during the valve-closing process and in the fully closed state.

[0056] Specifically, in one embodiment, as shown in FIG1, the inner wall of the flow cavity 101 protrudes towards its own axis to form an abutment portion 16. That is, in this embodiment, the abutment portion 16 has a boss structure. When the valve core assembly 30 moves to abut against the abutment portion 16, the resistance encountered by the valve core assembly 30 to continue moving is almost infinite. The valve stem 20 cannot continue to drive the valve core assembly 30 to move, so that the valve stem 20 and the rotor assembly 40 can be idling through the locking member 212.

[0057] In another embodiment, as shown in FIG2, the abutment portion 16 includes an elastic element 161 and a gasket 162. One end of the elastic element 161 is connected to the valve body assembly 10, and the other end is connected to the gasket 162. In the fully closed state, the valve core assembly 30 abuts against the gasket 162 and compresses the elastic element 161. Thus, when the valve core assembly 30 just moves to abut against the abutment portion 16, the locking member 212 does not compress the elastic element 211. At this time, the rotor assembly 40 can drive the valve stem 20 to continue rotating. As the rotor assembly 40 continues to rotate in the valve-closing direction, until the circumferential force exerted by the elastic element 161 on the valve stem 20 through the gasket 162 and the valve core assembly 30 reaches a balance with the driving force of the rotor assembly 40, the valve core assembly 30 can no longer move downward. During this period, the locking member 212 gradually compresses the elastic element 211 and enters the receiving hole 201, so that the valve stem 20 and the rotor assembly 40 can idle.

[0058] It should be noted that the valve structure 100 of this application can have flow or no flow when fully closed. For example, after the valve core assembly 30 and the abutment part 16 abut, no flow passes between the first flow port 102 and the second flow port 103. In this case, the valve structure 100 can be a gate valve or an electronic expansion valve. Of course, after the valve core assembly 30 and the abutment part 16 abut, a certain flow can also pass between the first flow port 102 and the second flow port 103. In this case, after the valve core assembly 30 and the abutment part 16 abut, a flow gap (flow groove, etc.) can be provided between the valve core assembly 30 and the valve body assembly 10 to allow a certain flow to pass, so that this structure can be used in the electronic expansion valve shown in FIG10.

[0059] Specifically, when the valve structure 100 is an electronic expansion valve, as shown in Figure 10, the electronic expansion valve may further include a valve port 60 and a nut seat 70. The valve stem 20 of the electronic expansion valve can be threadedly engaged with the nut seat 70 fixed on the valve body assembly 10, and then connected to the valve core assembly 30, rather than being directly threadedly engaged with the valve core assembly 30. The valve core assembly 30 controls the flow rate of fluid passing through the valve port 60 by moving axially. Based on this, when the electronic expansion valve is fully closed and there is no flow, the valve core assembly 30 can abut against the valve port 60, that is, the valve port 60 forms the aforementioned abutment portion 16. When the electronic expansion valve is fully closed and there is flow, the valve core assembly 30 can abut against the valve port 60, and by providing a flow gap (flow groove, etc.) on the valve port 60 or the valve core assembly 30, a certain amount of fluid can pass through when fully closed. Furthermore, the electronic expansion valve may also include a guide sleeve 50, through which the valve core assembly 30 passes and is guided. The valve core assembly 30 can abut against the guide sleeve 50, so that there is a gap between the end of the valve core assembly 30 and the valve port 60, that is, the guide sleeve 50 forms the aforementioned abutment portion 16, thereby realizing the passage of a certain amount of fluid when fully closed.

[0060] In one embodiment, as shown in Figures 1, 8, and 9, the first flow port 102 and the second flow port 103 are spaced apart axially in the valve body assembly 10. In the fully closed state, the valve core assembly 30 is blocked by one of the first flow port 102 and the second flow port 103, while the other of the first flow port 102 and the second flow port 103 is connected to the flow cavity 101. By spaced apart, when the valve core assembly 30 closes one of the flow ports, the entire flow channel can be cut off. At the same time, the other flow port can remain connected to the flow cavity 101. This helps to maintain the internal balance of the valve structure 100 in the closed state.

[0061] Specifically, in a traditional straight-through structure, when the valve structure 100 is closed, to ensure a seal, the fluid pressure at the flow ports on both sides of the valve core assembly 30 is different. The high-pressure side will push the valve core assembly 30 to the low-pressure side, resulting in increased friction between the valve core assembly 30 and the inner wall of the flow cavity 101, thus increasing the difficulty of opening the valve core assembly 30. In this application, however, during the axial movement of the valve core assembly 30, the outer wall of the valve core assembly 30 and the inner wall of the flow cavity 101 are in a movable sealing fit. Therefore, the valve core assembly 30 will divide the flow cavity 101 into two relatively independent cavities. Furthermore, since the two flow ports are offset axially, in the fully closed state, that is, when the valve structure 100 closes one flow port, the other can still maintain communication with one of the two cavities. Here, the portions of the flow chamber 101 located axially on opposite sides of the valve core assembly 30 can be defined as the first chamber 1011 and the second chamber 1012. In this case, pressure balance between the first chamber 1011 and the second chamber 1012 on both sides of the valve core assembly 30 can be achieved simply by machining the valve core assembly 30, without affecting the sealing effect of the valve core assembly 30 and the inner wall of the flow chamber 101. For example, a balance channel 301 is provided on the valve core assembly 30, with its two ends connected to the first chamber 1011 and the second chamber 1012 respectively. That is, in the fully closed state, the valve core assembly 30 is blocked by one of the first flow port 102 and the second flow port 103, while the other of the first flow port 102 and the second flow port 103 is connected to the balance channel 301. This achieves pressure balance between the first chamber 1011 and the second chamber 1012 in the fully closed state of the valve structure 100, thereby greatly reducing the difficulty of opening the valve when the valve core assembly 30 moves axially.

[0062] For ease of explanation, this application defines the cavity closer to the valve stem 20 in the two cavities formed by dividing the flow cavity 101 as the first cavity 1011, and the cavity farther from the valve stem 20 as the second cavity 1012. That is, the first cavity 1011 is located on the side of the second cavity 1012 closer to the valve stem 20. Similarly, the flow port closer to the valve stem 20 in the two flow ports is defined as the first flow port 102, and the flow port farther from the valve stem 20 is defined as the second flow port 103. That is, the first flow port 102 is located on the side of the second flow port 103 closer to the valve stem 20.

[0063] Furthermore, the valve structure 100 also includes a first sealing element 311 and a second sealing element 312. In the fully closed state, the first sealing element 311 and the second sealing element 312 are respectively disposed at both ends of the first flow port 102 or the second flow port 103 along the axial direction of the flow cavity 101. The first sealing element 311 and the second sealing element 312 are respectively sealed and cooperated with the inner wall of the flow cavity 101 and the outer wall of the valve core assembly 30, so that the valve core assembly 30 can be blocked in one of the first flow port 102 and the second flow port 103.

[0064] Understandably, with this configuration, the first seal 311 and the second seal 312 can completely cut off the flow path between the first flow port 102 and the second flow port 103 in the fully closed state. That is, the first cavity 1011 and the second cavity 1012, which are connected due to internal balance, will not be connected to the blocked first flow port 102 or the second flow port 103, thereby preventing internal leakage of the valve structure 100 when it is closed.

[0065] Furthermore, the first seal 311 and the second seal 312 are arranged in parallel, that is, the first seal 311 and the second seal 312 can be two parallel sealing rings, which have a simple structure and are easy to install. Here, the first seal 311 and the second seal 312 can both be installed on the outer wall of the valve core assembly 30, or they can both be installed on the inner wall of the flow cavity 101.

[0066] Similarly, for ease of explanation, the seal that is axially closer to the valve stem 20 can be defined as the first seal 311, and the seal that is farther away from the valve stem 20 can be defined as the second seal 312. That is, the first seal 311 is located on the side of the second seal 312 that is closer to the valve stem 20.

[0067] In one embodiment, as shown in Figures 1, 7, 8, and 9, the valve core assembly 30 includes a valve head 31 and a nut sleeve 32. The nut sleeve 32 is disposed at one end of the valve head 31. Here, the valve head 31 and the nut sleeve 32 can be an integral or separate structure. The end of the valve stem 20 away from the rotor assembly 40 is inserted into the nut sleeve 32 and threadedly connected to the nut sleeve 32, so that the valve stem 20 can drive the valve core assembly 30 to move axially. Furthermore, when the valve head 31 and the nut sleeve 32 are separately disposed, it is easier to process the valve head 31 and the nut sleeve 32, and the processing difficulty can be reduced.

[0068] Specifically, in this embodiment, the balance channel 301, the first seal 311 and the second seal 312 can all be disposed on the valve head 31. That is, the valve head 31 divides the flow chamber 101 to form the first chamber 1011 and the second chamber 1012 located at both ends of the valve head 31.

[0069] Furthermore, as shown in Figures 1, 7, 8, and 9, the valve body assembly 10 is also provided with a limiting hole 104 communicating with the flow cavity 101. The end of the nut sleeve 32 away from the valve head 31 is movably inserted into the limiting hole 104. The valve stem 20 passes through the limiting hole 104 and is threadedly connected to the nut sleeve 32, which is used to drive the valve core assembly 30 to move axially to control the opening and closing of the valve structure 100. Among them, the outer wall of the nut sleeve 32 is provided with a first anti-rotation part 321, and the inner wall of the limiting hole 104 is provided with a second anti-rotation part 121. The first anti-rotation part 321 and the second anti-rotation part 121 are connected to prevent the nut sleeve 32 from rotating relative to the limiting hole 104.

[0070] Understandably, the cooperation of the first anti-rotation part 321 and the second anti-rotation part 121 can prevent the nut sleeve 32 and the limiting hole 104 from rotating, ensuring that the nut sleeve 32 can only move axially during valve opening and closing, and will not rotate circumferentially. This effectively prevents the valve core assembly 30 from rotating, thereby reducing friction between the valve core assembly 30 and the inner wall of the flow cavity 101. This not only reduces friction and wear, extending the service life of components, but also reduces friction noise, thus improving the user experience of the valve structure 100.

[0071] Specifically, both the first anti-rotation part 321 and the second anti-rotation part 121 can be configured with anti-rotation surfaces. Here, the anti-rotation surfaces can adopt a planar structure for better anti-rotation effect, or they can be set as curved surfaces or other structures with a certain curvature. Of course, in other embodiments, the first anti-rotation part 321 and the second anti-rotation part 121 can also adopt the form of protrusions and grooves, etc., which are not limited here.

[0072] Furthermore, there are multiple first anti-rotation portions 321, which are spaced apart on the outer side wall of the nut sleeve 32. The number of second anti-rotation portions 121 corresponds one-to-one with the number of first anti-rotation portions 321. This further prevents circumferential rotation of the nut sleeve 32 and ensures the stability of the valve core assembly 30's axial movement.

[0073] In this embodiment, there are two first anti-rotation parts 321, and the two first anti-rotation parts 321 are provided on the opposite side walls of the nut sleeve 32 along its own radial direction. Of course, in other embodiments, the first anti-rotation parts 321 can also be set to three, four, etc., as long as they can achieve the same effect.

[0074] To facilitate the machining of the limiting hole 104, in one embodiment, as shown in Figures 1, 8, and 9, the valve body assembly 10 includes a valve seat 11 and a limiting sleeve 12, with the limiting sleeve 12 disposed at one end of the valve seat 11 and fixedly connected to it. The limiting hole 104 is formed in the limiting sleeve 12. Thus, by separating the valve seat 11 and the limiting sleeve 12, the limiting sleeve 12 can be machined individually, thereby improving the machining accuracy of the limiting sleeve 12 and reducing the machining difficulty. Alternatively, the valve seat 11 and the limiting sleeve 12 can also be an integral structure.

[0075] Furthermore, as shown in Figures 1 and 6, the valve seat 11 is provided with a first limiting part 111, and the limiting sleeve 12 is provided with a second limiting part 122. The first limiting part 111 and the second limiting part 122 are connected in cooperation to prevent the limiting sleeve 12 from rotating relative to the valve seat 11. In this way, the resistance to the rotation of the limiting sleeve 12 relative to the valve seat 11 can be increased, achieving the anti-rotation effect between the valve seat 11 and the limiting sleeve 12, and further ensuring that the limiting sleeve 12 can apply sufficient force to the nut sleeve 32, ensuring that the nut sleeve 32 and the limiting sleeve 12 will not rotate together when moving along the limiting hole 104, thereby improving the reliability of the overall structure.

[0076] Specifically, one of the first limiting part 111 and the second limiting part 122 is configured as a limiting protrusion, and the other is configured as a limiting groove. The limiting protrusion is inserted into the limiting groove to prevent the limiting sleeve 12 from rotating relative to the valve seat 11. In this way, the circumferential anti-rotation effect of the valve seat 11 on the limiting sleeve 12 can be guaranteed. Furthermore, as shown in Figures 1, 8, and 9, the valve seat 11 includes a main body 112 and a connecting sleeve 113. The connecting sleeve 113 is disposed at one end of the main body 112 and is fixedly connected to the main body 112. A connecting boss 1131 is formed by protrusion on the inner wall of the connecting sleeve 113, and one end of the limiting sleeve 12 passes through and is installed on the connecting boss 1131. The first limiting part 111 is disposed on the inner wall of the connecting boss 1131, and the second limiting part 122 is disposed on the outer wall of the limiting sleeve 12.

[0077] In one embodiment, the nut sleeve 32 and / or the limiting sleeve 12 are configured as plastic material parts. The plastic material has a high surface finish and low friction, which can reduce the frictional resistance between the nut sleeve 32 and the limiting sleeve 12.

[0078] Since in this embodiment, the valve stem 20 drives the valve core assembly 30 to move, and the axial movement of the valve core assembly 30 achieves the valve opening and closing functions, in order to improve the reliability of the cooperation between the valve stem 20 and the valve core assembly 30, the axial position of the valve stem 20 relative to the valve body assembly 10 can be kept constant. Based on this, in one embodiment, the valve structure 100 also includes a rotary bearing 22, which is installed inside the valve body assembly 10. The outer ring of the rotary bearing 22 is connected to the valve body assembly 10, and the inner ring of the rotary bearing 22 is connected to the valve stem 20, so that the rotary bearing 22 can prevent the valve stem 20 from moving axially relative to the valve body assembly 10. It is easy to understand that the valve stem 20 achieves both connection with the valve body assembly 10 and axial limitation through the rotary bearing 22, and also reduces the resistance when the valve stem 20 rotates circumferentially, resulting in higher reliability. Furthermore, the valve stem 20 can only rotate circumferentially through the rotating bearing 22, while remaining stationary axially. The nut sleeve 32 is kept circumferentially stationary through the limiting sleeve 12. Therefore, the nut sleeve 32 can only move axially under the threaded drive of the valve stem 20.

[0079] To further reduce the probability of axial movement of the valve stem 20, a protrusion 23 is formed on the outer periphery of the valve stem 20. The valve structure 100 also includes a mating part 24. The protrusion 23 and the mating part 24 are respectively located at opposite ends of the rotating bearing 22 along its own axial direction, and the mating part 24 is sleeved and connected to the valve stem 20 so that the protrusion 23 and the mating part 24 can cooperate to clamp the inner ring of the rotating bearing 22. In this way, through the connection between the mating part 24 and the valve stem 20, and in conjunction with the protrusion 23 formed on the valve stem 20, the strength of the connection between the valve stem 20 and the rotating bearing 22 can be effectively improved, preventing the valve stem 20 from moving axially, and making the overall structure more reliable.

[0080] Specifically, the valve body assembly 10 also includes a bearing seat 13, which is sleeved on the outer periphery of the limiting sleeve 12 and connected to both the valve seat 11 and the limiting sleeve 12 to prevent the limiting sleeve 12 from moving axially relative to the valve seat 11. Optionally, the bearing seat 13 can be connected to a connecting sleeve 113 on the valve seat 11, and its end and / or internal stepped holes cooperate with the connecting boss 1131 on the connecting sleeve 113 to achieve axial limiting of the limiting sleeve 12. A rotary bearing 22 is installed inside the bearing seat 13, with its outer ring fixedly connected to the bearing seat 13 and its inner ring connected to the valve stem 20, so that the rotary bearing 22 can prevent the valve stem 20 from moving axially. This facilitates the installation of the rotary bearing 22.

[0081] In one embodiment, as shown in Figures 8 and 9, the end of the first connecting pipe 14 away from the valve body assembly 10 is coaxially arranged with the end of the second connecting pipe 15 away from the valve body assembly 10.

[0082] It is understandable that after the first connecting pipe 14 and the second connecting pipe 15 are connected to the valve body assembly 10, the ends of both connected to the external pipeline can be located on the same straight line. This facilitates the determination of the installation position of the valve structure 100, improves the installation efficiency of the valve structure 100, and reduces the installation difficulty. For example, when the first flow port 102 and the second flow port 103 are spaced apart axially, during the installation process, it is only necessary to adjust the installation angle of the valve body assembly 10 appropriately so that the connecting pipes on both sides can be flush with the system pipeline to achieve installation.

[0083] In one embodiment, as shown in FIG8, the first connecting pipe 14 is configured as a straight pipe, and the axis of the first connecting pipe 14 is set at an angle to the axis of the valve body assembly 10. Similarly, the second connecting pipe 15 is also configured as a straight pipe, and the axis of the second connecting pipe 15 is set at an angle to the axis of the valve body assembly 10. Thus, the structures of the first connecting pipe 14 and the second connecting pipe 15 are simple and easy to manufacture.

[0084] In another embodiment, as shown in FIG9, the first connecting pipe 14 includes a first connecting portion 141 and a first adapter portion 142. One end of the first adapter portion 142 is connected to the valve body assembly 10. The first connecting portion 141 is located at the end of the first adapter portion 142 away from the valve body assembly 10, and the first connecting portion 141 and the first adapter portion 142 are directly or indirectly connected, wherein there is a bend between the first adapter portion 142 and the first connecting portion 141. Meanwhile, the second connecting pipe 15 includes a second connecting portion 151 and a second adapter portion 152. One end of the second adapter portion 152 is connected to the valve body assembly 10. The second connecting portion 151 is located at the end of the second adapter portion 152 away from the valve body assembly 10, and the second connecting portion 151 and the second adapter portion 152 are directly or indirectly connected, wherein there is a bend between the second adapter portion 152 and the second connecting portion 151. Thus, the arrangement of the first connecting pipe 14 and the second connecting pipe 15 is more flexible, and the included angles between the first adapter 142 and the first connecting pipe 141, and between the second adapter 152 and the second connecting pipe 151, can be adjusted according to actual needs to facilitate the processing of the first flow port 102 and the second flow port 103. The bends between the first connecting pipe 141 and the first adapter 142, and between the second connecting pipe 151 and the second adapter 152, can be set to one or more, and can be reasonably set according to actual needs.

[0085] Specifically, in this embodiment, the first connecting part 141 and the second connecting part 151 are used to connect to the system pipeline, and the first connecting part 141 and the second connecting part 151 are located on the same axis. This facilitates the connection of the first connecting part 141 and the second connecting part 151 to the external system pipeline and reduces the installation difficulty.

[0086] Furthermore, the axis of the first adapter 142 can be perpendicular to the axis of the valve body assembly 10. Simultaneously, the axis of the second adapter 152 can be perpendicular to the axis of the valve body assembly 10. In this way, the first flow port 102 and the second flow port 103 can also be perpendicular to the axial direction of the valve body assembly 10, which helps improve processing efficiency and reduce processing difficulty.

[0087] However, this is not the only option. In other embodiments, the first connecting pipe 14 can be configured as a straight pipe, and the second connecting pipe 15 can be configured such that the second connecting portion 151 and the second transition portion 152 are arranged at an angle and connected to each other. Of course, the first connecting pipe 14 can also be configured such that the first connecting portion 141 and the first transition portion 142 are arranged at an angle and connected to each other, and the second connecting pipe 15 can be configured as a straight pipe, as long as it can be ensured that the ends of the first connecting pipe 14 and the second connecting pipe 15 connected to the external pipeline are on the same straight line after they are connected to the valve body assembly 10.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A valve structure, characterized in that, The valve assembly includes a valve body assembly (10), a rotor assembly (40), a valve stem (20), and a valve core assembly (30). The rotor assembly (40), valve stem (20), and valve core assembly (30) are all installed within the valve body assembly (10). The rotor assembly (40) has a drive hole (401). One end of the valve stem (20) passes through the drive hole (401) and is connected to the rotor assembly (40), while the other end is connected to the valve core assembly (30). The rotor assembly (40) can drive the valve stem (20) to rotate and cause the valve core assembly (30) to move axially. The inner wall of the moving hole (401) is provided with a locking groove (402), and the valve stem (20) is provided with a receiving hole (201). A locking component (21) is movably installed in the receiving hole (201), and the locking component (21) can be inserted into the locking groove (402) so that the rotor assembly (40) can drive the valve stem (20) to rotate synchronously through the locking component (21). The valve structure has a fully closed state, and in the fully closed state, the locking component (21) can disengage from the locking groove (402) so that the rotor assembly (40) and the valve stem (20) can rotate relative to each other.

2. The valve structure according to claim 1, characterized in that, The locking assembly (21) includes an elastic element (211) and a locking element (212), one end of the elastic element (211) being connected to the locking element (212) to apply a force to the locking element (212) to move toward the locking groove (402).

3. The valve structure according to claim 2, characterized in that, The locking groove (402) is configured as a toothed groove. The side wall of the toothed groove that applies force to the locking member (212) along the valve opening direction of the valve structure is defined as the first side wall (4021), and the side wall of the toothed groove that applies force to the locking member (212) along the valve closing direction of the valve structure is defined as the second side wall (4022). The inclination angle of the first side wall (4021) is Q1, and the inclination angle of the second side wall (4022) is Q2, wherein Q1 > Q2.

4. The valve structure according to claim 2, characterized in that, The locking groove (402) is configured as a toothed groove. The side wall of the toothed groove that applies force to the locking member (212) along the valve opening direction of the valve structure is defined as the first side wall (4021), and the side wall of the toothed groove that applies force to the locking member (212) along the valve closing direction of the valve structure is defined as the second side wall (4022). The resistance in the circumferential direction that the valve stem (20) experiences in the fully closed state is defined as F1. The resistance in the circumferential direction that the first side wall (4021) applies to the locking member (212) when it rotates in the valve opening direction is defined as F2. The resistance in the circumferential direction that the second side wall (4022) applies to the locking member (212) when it rotates in the valve closing direction is defined as F3. The resistance in the circumferential direction that the valve stem (20) experiences during the valve opening or closing process is defined as F4. Wherein, F1≥F3, F2>F4, F3>F4.

5. The valve structure according to claim 2, characterized in that, The locking element (212) is spherically shaped.

6. The valve structure according to any one of claims 1-5, characterized in that, The valve body assembly (10) is provided with an abutment portion (16), which is located at the end of the valve core assembly (30) away from the valve stem (20). In the fully closed state, the end of the valve core assembly (30) away from the valve stem (20) abuts against the abutment portion (16).

7. The valve structure according to claim 6, characterized in that, The valve body assembly (10) has a flow cavity (101), and the inner wall of the flow cavity (101) protrudes towards its own axis to form the abutment portion (16); or, the abutment portion (16) includes an elastic element (161) and a gasket (162), one end of the elastic element (161) is connected to the valve body assembly (10), and the other end is connected to the gasket (162), and in the fully closed state, the valve core assembly (30) abuts against the gasket (162) and compresses the elastic element (161).

8. The valve structure according to claim 1, characterized in that, The valve core assembly (30) includes a valve head (31) and a nut sleeve (32). The nut sleeve (32) is disposed at one end of the valve head (31), and the valve stem (20) at the end away from the rotor assembly (40) is inserted into the nut sleeve (32) and threadedly connected to the nut sleeve (32).

9. The valve structure according to claim 8, characterized in that, The valve body assembly (10) has a limiting hole (104), and the end of the nut sleeve (32) away from the valve head (31) is movably inserted into the limiting hole (104); wherein, the outer side wall of the nut sleeve (32) is provided with a first anti-rotation part (321), and the inner wall of the limiting hole (104) is provided with a second anti-rotation part (121). The first anti-rotation part (321) and the second anti-rotation part (121) are connected to prevent the nut sleeve (32) from rotating relative to the limiting hole (104).

10. The valve structure according to claim 9, characterized in that, Both the first anti-rotation part (321) and the second anti-rotation part (121) are configured with anti-rotation surfaces.

11. The valve structure according to claim 1, characterized in that, The valve structure also includes a rotary bearing (22), which is installed inside the valve body assembly (10). The outer ring of the rotary bearing (22) is connected to the valve body assembly (10), and the inner ring of the rotary bearing (22) is connected to the valve stem (20) so that the rotary bearing (22) can prevent the valve stem (20) from moving axially relative to the valve body assembly (10).

12. The valve structure according to claim 11, characterized in that, The valve stem (20) has a protruding part (23) on its outer periphery. The valve structure also includes a mating part (24). The protruding part (23) and the mating part (24) are respectively provided at opposite ends of the rotating bearing (22) along its own axial direction. The mating part (24) is sleeved and connected to the valve stem (20) so that the protruding part (23) and the mating part (24) can cooperate to clamp the inner ring of the rotating bearing (22).

13. The valve structure according to claim 1, characterized in that, The valve body assembly (10) has a flow chamber (101), a first flow port (102), and a second flow port (103); the first flow port (102) and the second flow port (103) are spaced apart in the axial direction of the valve body assembly (10), and in the fully closed state, the valve core assembly (30) is blocked in one of the first flow port (102) and the second flow port (103), and the other of the first flow port (102) and the second flow port (103) is connected to the flow chamber (101).

14. The valve structure according to claim 13, characterized in that, The flow chamber (101) is defined as the first chamber (1011) and the second chamber (1012) located on opposite sides of the valve core assembly (30) along the axial direction. The valve core assembly (30) is provided with a balance channel (301), and the two ends of the balance channel (301) are respectively connected to the first chamber (1011) and the second chamber (1012).

15. A gate valve, characterized in that, The valve assembly includes a valve body assembly (10), a rotor assembly (40), a valve stem (20), and a valve core assembly (30). The rotor assembly (40), valve stem (20), and valve core assembly (30) are all installed within the valve body assembly (10). The rotor assembly (40) has a drive hole (401). One end of the valve stem (20) passes through the drive hole (401) and is connected to the rotor assembly (40), while the other end is connected to the valve core assembly (30). The rotor assembly (40) can drive the valve stem (20) to rotate and cause the valve core assembly (30) to move axially. The inner wall of the moving hole (401) is provided with a locking groove (402), and the valve stem (20) is provided with a receiving hole (201). A locking component (21) is movably installed in the receiving hole (201), and the locking component (21) can be inserted into the locking groove (402) so that the rotor assembly (40) can drive the valve stem (20) to rotate synchronously through the locking component (21). The gate valve has a fully closed state, and in the fully closed state, the locking component (21) can disengage from the locking groove (402) so that the rotor assembly (40) and the valve stem (20) can rotate relative to each other.

16. An electronic expansion valve, characterized in that, The valve assembly includes a valve body assembly (10), a rotor assembly (40), a valve stem (20), and a valve core assembly (30). The rotor assembly (40), valve stem (20), and valve core assembly (30) are all installed within the valve body assembly (10). The rotor assembly (40) has a drive hole (401). One end of the valve stem (20) passes through the drive hole (401) and is connected to the rotor assembly (40), while the other end is connected to the valve core assembly (30). The rotor assembly (40) can drive the valve stem (20) to rotate and cause the valve core assembly (30) to move axially. The inner wall of the hole (401) is provided with a locking groove (402), and the valve stem (20) is provided with a receiving hole (201). A locking component (21) is movably installed in the receiving hole (201), and the locking component (21) can be inserted into the locking groove (402) so that the rotor assembly (40) can drive the valve stem (20) to rotate synchronously through the locking component (21). The electronic expansion valve has a fully closed state, and in the fully closed state, the locking component (21) can disengage from the locking groove (402) so that the rotor assembly (40) and the valve stem (20) can rotate relative to each other.

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