Manual throttling stop valve

Abstract

The utility model provides a manual throttle stop valve relates to stop valve technical field, the manual throttle stop valve includes valve body, valve seat, valve rod, valve core and throttle structure, valve body includes the water chamber and is communicated with the water chamber and water chamber, valve seat is connected to the water inlet end of water chamber, valve rod one end is located outside valve body, valve rod one end is located outside valve body, valve rod one end is located outside valve rod one end, valve rod one end is located outside valve rod one end, valve rod one end is located outside valve rod one end, valve rod one end is located outside valve rod one end, valve rod one end is located outside valve rod one end. The valve element is located in the water containing cavity and connected to the bottom of the valve rod, the bottom of the valve element corresponds to the valve seat, and the valve rod can drive the valve element to ascend and descend. One end of the throttling structure is connected to the bottom of the valve element, the other end of the throttling structure can be inserted into the valve seat and can move up and down along the axis of the valve seat, the throttling structure comprises a plurality of throttling channels, the throttling channels can be communicated with the water inlet cavity and the water containing cavity, and the throttling channels can be configured into different overflowing areas. The throttling channel has different through-flow areas by adjusting the distance between the valve element and the valve seat, so that the flow is changed, and the requirements of different working conditions are met.

Description

Technical Field

[0001] The utility model relates to the technical field of globe valves, and particularly relates to a manual throttle globe valve. Background Art

[0002] In a high-pressure water descaling system, a control system pipeline globe valve is arranged in a descaling control unit. The globe valve is located in front of a descaling valve, can realize the on-off of water flow, and has the function of maintenance at the same time.

[0003] In the prior art, the globe valve is mainly designed to control the on-off of fluid, that is, to realize the opening and closing operations to meet the basic fluid control requirements. However, it does not have a throttling function, that is, it cannot adjust the fluid. When descaling, it is necessary to adjust the flow rate of the fluid, and the globe valve cannot meet the exact requirements.

[0004] To solve the above problems, there is an urgent need to provide a manual throttle globe valve. Summary of the Utility Model

[0005] To achieve the purpose of the utility model, the following technical solutions are adopted in the utility model:

[0006] According to one aspect of the utility model, a manual throttle globe valve is provided, including:

[0007] A valve body, including a water-containing cavity and a water inlet cavity and a water outlet cavity communicating with the water-containing cavity;

[0008] A valve seat, connected to the water inlet end of the water-containing cavity;

[0009] A valve stem, one end of which is located outside the valve body and the other end is inserted into the water-containing cavity;

[0010] A valve core, located inside the water-containing cavity and connected to the bottom of the valve stem. The bottom of the valve core corresponds to the valve seat, and the valve stem can drive the valve core to move up and down;

[0011] A throttling structure, one end of which is connected to the bottom of the valve core, and the other end can be inserted into the inside of the valve seat and can move up and down along the axis of the valve seat. Wherein, the throttling structure includes a plurality of throttling channels, the throttling channels can communicate the water inlet cavity and the water-containing cavity, and the throttling channels can be configured with different flow-through areas for adjusting the water inflow.

[0012] According to an embodiment of the utility model, the throttling structure includes a throttling cylinder, the top of the throttling cylinder is connected to the valve core, the throttling cylinder can be inserted into the valve seat, and the throttling cylinder and the valve seat are in clearance fit;

[0013] Among them, a plurality of throttling grooves with openings facing downward are evenly formed in the circumferential direction of the throttling cylinder, and a throttling channel is formed by surrounding between each throttling groove and the valve seat.

[0014] According to an embodiment of the present invention, wherein the throttling groove is in an inverted "V" shape.

[0015] According to an embodiment of the present invention, wherein the manual throttling stop valve further includes a lower balance cavity and an upper balance cavity located above the water-containing cavity, and the lower balance cavity, the upper balance cavity, and the water-containing cavity are not communicated with each other, and the valve stem passes through the lower balance cavity and the upper balance cavity;

[0016] Among them, the valve stem is a hollow rod body, the valve stem is provided with a water inlet hole, a lower drain hole communicated with the lower balance cavity, and an upper drain hole communicated with the upper balance cavity, and the valve core is provided with a water inlet channel communicating the water inlet hole and the water inlet cavity.

[0017] According to an embodiment of the present invention, wherein the manual throttling stop valve further includes:

[0018] A valve cover, connected to the top of the valve body;

[0019] A lower guide sleeve, the upper part of which is sleeved on the inner wall of the valve cover, and the lower part of which is inserted into the water-containing cavity, and the lower guide sleeve and the valve cover are hermetically connected;

[0020] A valve sleeve, located in the water-containing cavity, connected between the valve cover and the valve seat, and the top of the valve sleeve is detachably and fixedly connected to the valve cover, the valve core is inserted into the valve sleeve and slidably connected to the middle of the valve sleeve, and the valve stem extends upward from the valve core and sequentially passes through the valve sleeve, the lower guide sleeve and the valve cover;

[0021] Among them, a first seal corresponding to the valve core is provided in the middle of the valve sleeve, and a second seal corresponding to the valve stem is provided on the inner side wall of the lower guide sleeve, and a lower balance cavity is formed by surrounding between the valve cover, the lower guide sleeve, the valve sleeve and the valve core.

[0022] According to an embodiment of the present invention, wherein the manual throttling stop valve further includes:

[0023] A cylinder barrel, the bottom of which is connected to the top of the valve cover;

[0024] A connecting flange, connected to the top of the cylinder barrel, and the valve stem extends upward from the water-containing cavity and is sequentially inserted into the cylinder barrel and the inside of the connecting flange;

[0025] The upper guide sleeve is connected to the connection flange at the top and sleeved on the inner circumference of the cylinder barrel at the bottom. The upper guide sleeve and the valve stem are in clearance fit so that the valve stem can slide along the axis of the upper guide sleeve;

[0026] The middle guide sleeve is sleeved on the inner circumference of the cylinder barrel and can slide along the axis of the cylinder barrel. The middle guide sleeve is sleeved on the outer circumference of the valve stem;

[0027] The limiting member is connected between the middle guide sleeve and the valve stem. The outer circumference of the limiting member and the inner wall of the cylinder barrel are in clearance fit;

[0028] Wherein, a third seal corresponding to the valve stem is provided on the inner circumference of the upper guide sleeve, a fourth seal corresponding to the valve stem is provided on the inner circumference of the middle guide sleeve, and the cylinder barrel, the upper guide sleeve, the middle guide sleeve and the limiting member jointly enclose to form the upper balance cavity.

[0029] According to an embodiment of the present invention, a water passing hole communicating with the water containing cavity is opened at the lower part of the valve sleeve. The middle part of the inner wall of the valve sleeve bulges inward to form a convex part. The valve core and the convex part are in sliding connection, and the first seal is provided on the inner circumference of the convex part.

[0030] According to an embodiment of the present invention, the manual throttle stop valve further includes:

[0031] The guide key is connected to the valve stem at one end and to the connection flange at the other end. Wherein, a key groove for connecting the guide member is provided on the valve stem, and a guide groove corresponding to the guide key is provided on the connection flange for guiding the movement of the valve stem.

[0032] According to an embodiment of the present invention, the manual throttle stop valve further includes:

[0033] The threaded sleeve is provided with a threaded hole penetrating axially. The valve stem is inserted into the threaded hole and is in threaded connection with it. A first step is provided at the upper part of the threaded sleeve;

[0034] The wrench is connected to the first step for driving the threaded sleeve to rotate.

[0035] According to an embodiment of the present invention, a limiting protrusion protruding outward is provided in the middle of the threaded sleeve. A first bearing and a second bearing are provided inside the connection flange. The first bearing and the second bearing are respectively sleeved on the outer circumference of the threaded sleeve. The top of the first bearing abuts against the limiting protrusion, and the bottom of the second bearing abuts against the limiting protrusion;

[0036] Among them, a fastening nut is provided at the top of the connecting flange. The fastening nut is sleeved on the outer periphery of the threaded sleeve and its bottom abuts above the second bearing.

[0037] The utility model has the following advantages or beneficial effects:

[0038] By adjusting the distance between the valve core and the valve seat, the throttling passage has different flow areas, thereby changing the flow rate, so that the valve has both throttling and shut-off functions to meet the requirements of different working conditions.

[0039] When the throttle stop valve is opened, the fluid in the water inlet cavity enters the water containing cavity and flows to the lower balance cavity and the upper balance cavity respectively through the water inlet passage, the water inlet hole, the lower drain hole and the upper drain hole; when it is necessary to close the throttle stop valve, the lower balance cavity and the upper balance cavity provide a hydraulic pressure downward on the stop valve, which can quickly cut off the fluid. Description of the Drawings

[0040] By referring to the drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present utility model will become more obvious.

[0041] Figure 1 is a cross-sectional view of a manual throttle stop valve shown according to an exemplary embodiment.

[0042] Figure 2 is Figure 1 an enlarged view of part A in

[0043] Among them, the reference numerals are explained as follows:

[0044] 1. Valve body; 1a. Water containing cavity; 1b. Water inlet cavity; 1c. Water outlet cavity;

[0045] 2. Valve seat;

[0046] 3. Valve stem; 31. Water inlet hole; 32. Lower drain hole; 33. Upper drain hole; 34. Keyway;

[0047] 4. Valve core; 41. Water inlet passage;

[0048] 5. Throttling structure; 51. Throttling cylinder; 511. Throttling groove;

[0049] 6. Valve cover;

[0050] 7. Lower guide sleeve;

[0051] 8. Valve sleeve; 81. Water passing hole;

[0052] 9. Cylinder barrel;

[0053] 10. Connecting flange; 101. Guide groove;

[0054] 11. Upper guide sleeve;

[0055] 12. Middle guide sleeve;

[0056] 13. Limiting part;

[0057] 14. Guide key;

[0058] 15. Threaded sleeve; 150. Threaded hole; 151. Limiting protrusion;

[0059] 16. Wrench;

[0060] 17. First bearing;

[0061] 18. Second bearing;

[0062] 19. Fastening nut;

[0063] 20. Protective cover;

[0064] 1000. Lower balance cavity; 1001. Upper balance cavity. Detailed implementation manners

[0065] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0066] The terms "a", "an", "the", and "said" are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.

[0067] A manual throttle globe valve according to an embodiment of the present utility model, the manual throttle globe valve includes a valve body 1, a valve seat 2, a valve stem 3, a valve core 4 and a throttle structure 5. The valve body 1 includes a water-containing cavity 1a, an inlet cavity 1b and an outlet cavity 1c communicating with the water-containing cavity 1a; the valve seat 2 is connected to the inlet end of the water-containing cavity 1a; one end of the valve stem 3 is located outside the valve body 1, and the other end of the valve stem 3 is inserted into the water-containing cavity 1a. The valve core 4 is located inside the water-containing cavity 1a and is connected to the bottom of the valve stem 3. The bottom of the valve core 4 can correspond to the valve seat 2, and the valve stem 3 can drive the valve core 4 to move up and down to control the on-off of the valve; one end of the throttle structure 5 is connected to the bottom of the valve core 4, and the other end of the throttle structure 5 can be inserted into the inside of the valve seat 2 and can move up and down along the axis of the valve seat 2. Among them, the throttle structure 5 includes a plurality of throttle channels, the throttle channels can communicate the inlet cavity 1b and the water-containing cavity 1a, and the throttle channels can be configured with different flow areas to control the flow rate entering the water-containing cavity 1a. Among them, a first sealing surface for sealing is provided at the bottom of the outer periphery of the valve core 4, and a second sealing surface for sealingly fitting with the first sealing surface is provided on the inner peripheral wall of the valve seat 2. Both the first sealing surface and the second sealing surface are conical surfaces to improve the sealing effect between the valve core 4 and the valve seat 2 and further improve the leak-proof effect of the valve body 1. In addition, the throttle structure 5 is connected to the bottom of the valve core 4 and can move up and down with the valve core 4 driven by the valve stem 3. When the globe valve is in the closed state, the throttle channels and the water-containing cavity 1a are not connected. As the valve stem 3 moves upward, the throttle structure 5 moves upward accordingly. Part of the throttle channels move above the valve seat 2, so that the throttle channels and the water-containing cavity 1a start to communicate, and as the valve stem 3 moves upward, each throttle channel is completely opened. In this application, by providing the throttle structure 5 between the valve core 4 and the valve seat 2, the flow area amount entering the water-containing cavity 1a from the inlet cavity 1b can be controlled through the throttle channels, so as to change the flow rate by using different flow areas, so that the valve has both throttling and shutting-off functions to meet different working conditions.

[0068] In a preferred embodiment of the present utility model, as Figure 1 and 2 shown, the throttle structure 5 includes a throttle cylinder 51. The top of the throttle cylinder 51 is connected to the bottom of the valve core 4. The throttle cylinder 51 can be inserted into the valve seat 2, and the throttle cylinder 51 and the valve seat 2 are in clearance fit; among them, a plurality of throttle grooves 511 opening downward are uniformly formed in the throttle cylinder 51 along its axial direction, and a throttle channel is formed by surrounding between each throttle groove 511 and the valve seat 2. In this application, the bottom of the throttle cylinder 51 is grooved upward to form the throttle grooves 511 opening downward, and the throttle grooves 511 communicate the inlet cavity 1b into the water-containing cavity 1a; as the valve opens, part or all of the throttle grooves 511 move above the valve seat 2, so that the throttle channels with different flow areas are formed between the throttle grooves 511 and the valve seat 2 to realize the control of the water volume. Preferably, the throttle structure 5 and the valve core 4 are integrally formed, reducing the parts of the valve and improving the assembly efficiency of the valve.

[0069] In a preferred embodiment of the present utility model, as Figure 1 and 2 shown, the throttling groove 511 is in an inverted "V" shape. In this way, as the valve core 4 moves upward, the flow-through area of the throttling channel increases in a certain proportion. Especially when it is just opened, it has a smaller flow-through area to achieve precise flow control.

[0070] In a preferred embodiment of the present utility model, as Figure 1 and 2 shown, the manual throttling stop valve further includes a lower balance cavity 1000 and an upper balance cavity 1001 located above the water-containing cavity 1a. The lower balance cavity 1000, the upper balance cavity 1001, and the water-containing cavity 1a are not communicated with each other, and the valve stem 3 passes through the lower balance cavity 1000 and the upper balance cavity 1001. Among them, the valve stem 3 is a hollow rod body. The valve stem 3 is provided with a water inlet hole 31, a lower drain hole 32 communicated with the lower balance cavity 1000, and an upper drain hole 33 communicated with the upper balance cavity 1001. The valve core 4 is provided with a water inlet channel 41 communicating the water inlet hole 31 and the water inlet cavity 1b. In this way, the water in the water inlet cavity 1b sequentially enters the inside of the valve stem 3 through the water inlet channel 41 and the water inlet hole 31, and enters the lower balance cavity 1000 and the upper balance cavity 1001 through the lower drain hole 32 and the upper drain hole 33 respectively. Among them, the water in the lower balance cavity 1000 can press the valve core 4 downward, and the water in the upper balance cavity 1001 can press the valve stem 3 downward. Specifically, the lower balance cavity 1000 and the upper balance cavity 1001 are relatively independent of the water-containing cavity 1a. The high-pressure water in the lower balance cavity 1000 generates a downward hydraulic force on the upper surface of the valve core 4, and this hydraulic force is used to balance the upward hydraulic force of the high-pressure water in the water inlet cavity 1b on the valve core 4 and the lower surface of the valve seat 2. However, the upward water pressure generated by the high-pressure water in the water inlet cavity 1b on the lower end cross-section of the valve stem 3 is not balanced. The high-pressure water in the upper balance cavity 1001 generates a downward hydraulic force on the valve stem 3, and the unbalanced hydraulic force. The cross-sections of the two are the same, and the hydraulic forces cancel each other out, that is, the design of the upper balance cavity 1001 can completely eliminate the hydraulic force of water on the valve stem. In this way, when the valve is opened or closed, only the self-weight and friction of the valve internals need to be overcome, and the driving force can be effectively reduced while meeting the basic functions, making the valve operation easy and labor-saving.

[0071] In a preferred embodiment of the present utility model, as Figure 1 and 2The manual throttle stop valve shown also includes a valve cover 6, a lower guide sleeve 7, and a valve sleeve 8 located in the water-containing cavity 1a. The valve cover 6 is connected to the top of the valve body 1. The upper part of the lower guide sleeve 7 is sleeved on the inner wall of the valve cover 6, and the lower part of the lower guide sleeve 7 is inserted into the water-containing cavity 1a. The top of the valve sleeve 8 is detachably and fixedly connected to the valve cover 6. The valve sleeve 8 is connected between the valve cover 6 and the valve seat 2. Among them, the valve stem 3 extends upward from the valve core 4 and sequentially passes through the valve sleeve 8, the lower guide sleeve 7, and the valve cover 6. A lower balance cavity 1000 is formed by enclosing the valve cover 6, the lower guide sleeve 7, the valve sleeve 8, and the valve core 4. The lower guide sleeve 7 and the valve cover 6 are hermetically connected to prevent the water in the upper balance cavity 1001 from flowing into the lower balance cavity 1000. The detachable fixed connection in this embodiment means that the valve sleeve 8 and the valve cover 6 are detachably connected.

[0072] A first seal is provided in the middle of the valve sleeve 8 and is sleeved on the outer periphery of the valve core 4. A second seal is provided on the inner side wall of the lower guide sleeve 7 and is sleeved on the outer periphery of the valve stem 3. Through the first seal and the second seal, it is possible to prevent the upper balance cavity 1001 from communicating with the water-containing cavity 1a and the lower balance cavity 1000, so that the lower balance cavity 1000 forms an independent accommodating cavity. The first seal and the second seal in this embodiment can be sealing rings.

[0073] Preferably, a compression nut is connected between the valve core 4 and the valve stem 3. The compression nut is threadedly connected to the inside of the valve core 4 and fixes the valve stem 3 in the valve core 4.

[0074] In a preferred embodiment of the present utility model, as Figure 1 and 2The manual throttle stop valve shown also includes a cylinder barrel 9, a connecting flange 10, an upper guide sleeve 11, a middle guide sleeve 12 and a limiting member 13. The bottom of the cylinder barrel 9 is connected to the top of the valve cover 6; the connecting flange 10 is connected to the top of the cylinder barrel 9, and the valve stem 3 extends upward from the water-containing cavity 1a and is sequentially inserted into the interiors of the cylinder barrel 9 and the connecting flange 10; the top of the upper guide sleeve 11 is connected to the connecting flange 10, the lower part of the upper guide sleeve 11 is sleeved on the inner circumference of the cylinder barrel 9, and the upper guide sleeve 11 and the valve stem 3 are in clearance fit so that the valve stem 3 can slide along the axis of the upper guide sleeve 11; the middle guide sleeve 12 is sleeved on the inner circumference of the cylinder barrel 9 and slides along the axis of the cylinder barrel 9, and the middle guide sleeve 12 is arranged on the outer circumference of the valve stem 3; the limiting member 13 is connected between the middle guide sleeve 12 and the valve stem 3, and the outer circumference of the limiting member 13 is in clearance fit with the inner wall of the cylinder barrel 9; wherein, a third seal corresponding to the valve stem 3 is provided on the inner circumference of the upper guide sleeve 11, a fourth seal corresponding to the valve stem 3 is provided on the inner circumference of the middle guide sleeve 12, and the cylinder barrel 9, the upper guide sleeve 11, the middle guide sleeve 12 and the limiting member 13 jointly enclose to form an upper balance cavity 1001. In this embodiment, the third seal and the fourth seal are respectively used to increase the sealing performance between the upper guide sleeve 11 and the valve stem 3, and between the middle guide sleeve 12 and the valve stem 3, so that the upper balance cavity 1001 forms an independent cavity for eliminating the hydraulic pressure on the valve stem 3 that has not been balanced, making the valve operation easy and labor-saving. The third seal and the fourth seal in this embodiment can be sealing rings. The limiting member 13 is a limiting nut, the limiting nut is sleeved on the valve stem 3 and is threadedly connected to the outer wall of the valve stem 3, and the lower part of the limiting nut is fixedly connected to the upper part of the middle guide sleeve 12 for limiting the position of the middle guide sleeve 12.

[0075] Preferably, a radially penetrating detection hole is provided in the lower part of the cylinder barrel 9, and the detection hole is used to detect whether there is leakage between the middle guide sleeve 12 and the cylinder barrel 9.

[0076] In a preferred embodiment of the present invention, as Figure 1 and 2 shown, a water passing hole 81 communicating with the water-containing cavity 1a is provided in the lower part of the valve sleeve 8, the valve core 4 is inserted into the valve sleeve 8 and is slidably connected to the middle part of the valve sleeve 8; the middle part of the inner wall of the valve sleeve 8 bulges inward to form a convex part, the valve core 4 is slidably connected to the convex part, and a first seal is further provided on the inner circumference of the convex part, and the first seal is sealingly connected to the valve core 4; the convex part can reduce the friction area between the valve core 4 and the valve sleeve 8 and reduce the resistance of the valve opening and closing. At the same time, as the valve core 4 leaves the valve seat 2, the water in the water inlet cavity 1b enters the valve sleeve 8 through the throttle channel formed by the valve seat 2 and the throttle groove 511, and enters the water-containing cavity 1a through the water passing hole 81 on the valve sleeve 8. Since the convex part is located above the water passing hole 81, the first seal can block the communication between the water-containing cavity 1a and the lower balancer 1000.

[0077] In a preferred embodiment of the present invention, as Figure 1 and2 The manual throttle stop valve shown also includes a guide key 14. One end of the guide key 14 is connected to the valve stem 3, and the other end of the guide key 14 is connected to the connecting flange 10. Wherein, the valve stem 3 is provided with a keyway 34 for connecting a guide member, and the connecting flange 10 is provided with a guide groove 101 corresponding to the guide key 14 for guiding the movement of the valve stem 3.

[0078] In a preferred embodiment of the present utility model, as Figure 1 and 2 The manual throttle stop valve shown also includes a threaded sleeve 15 and a wrench 16. The threaded sleeve 15 is provided with a threaded hole 150 penetrating axially. The valve stem 3 is inserted into the threaded hole 150 and is threadedly connected thereto. The upper part of the threaded sleeve 15 is provided with a first step; the wrench 16 is connected to the first step for driving the threaded sleeve 15 to rotate. The inner wall of the wrench 16 is rotatably and slidably connected to the outer wall of the threaded sleeve 15; when the wrench 16 rotates, it drives the threaded sleeve 15 to rotate, and the axial movement of the valve stem 3 is realized through the guide key 14. By rotating the wrench 16, the threaded sleeve 15 and the valve stem 3 thereon perform a rotational lifting movement to realize the on-off of the valve. The structure is simple and the operation is convenient. A protective cover 20 is provided on the upper part of the threaded sleeve 15 through bolts to prevent the wrench 16 from coming off. The wrench 16 can be a flat wrench, a cross wrench or other handwheels as long as it can drive the threaded sleeve 15 to rotate.

[0079] In a preferred embodiment of the present utility model, as Figure 1 and 2 The middle part of the threaded sleeve 15 shown is provided with an outwardly protruding limit projection 151. The inside of the connecting flange 10 is provided with a first bearing 17 and a second bearing 18. The first bearing 17 and the second bearing 18 are respectively sleeved on the outer periphery of the threaded sleeve 15. The top of the first bearing 17 abuts against the limit projection 151, and the bottom of the second bearing 18 abuts against the limit projection 151; wherein, a fastening nut 19 is provided on the top of the connecting flange 10. The fastening nut 19 is sleeved on the outer periphery of the threaded sleeve 15 and its bottom abuts above the second bearing 18. The use of the first bearing 17 and the second bearing 18 can reduce the rotational wear and rotational resistance of the threaded sleeve 15. At the same time, the connecting flange 10 is provided with mounting holes for mounting the first bearing 17 and the second bearing 18. The first bearing 17 and the second bearing 18 are embedded in the mounting holes. The fastening nut 19 is meshed with the thread on the upper part of the connecting flange 10 for pressing and fixing the second bearing 18. Since the limit projection 151 is inserted between the first bearing 17 and the second bearing 18, the axial limit of the threaded sleeve 15 is realized.

[0080] The specific process is as follows:

[0081] When the valve is closed, water flows through the water inlet channel 41, water inlet hole 31, lower drain hole 32, and upper drain hole 33 formed in the middle of the valve core into the lower balance chamber 1000 and the upper balance chamber 1001, isolating from the water-containing chamber 1a and the outside world. The high-pressure water generates a downward hydraulic force on the upper surface of the valve core 4 and the compression nut in the lower balance chamber 1000. This hydraulic pressure is used to balance the upward hydraulic pressure of the high-pressure water on the valve core 4 and the lower surface of the valve seat 2 in the water inlet chamber 1b. However, the upward water pressure of the high-pressure water on the lower cross-section of the valve stem 3 in the water inlet chamber 1b is not balanced. The high-pressure water in the upper balance chamber 1001 generates a downward hydraulic force on the annular area formed by the valve stem 3 and the middle guide sleeve 12. The cross-sections of the two pressures are the same, and the hydraulic forces cancel each other out. That is, the design of the upper balance chamber can completely eliminate the hydraulic force of water on the valve stem 3. In this way, when the valve is opened or closed, only the self-weight and friction of the valve internals need to be overcome to effectively reduce the driving force while meeting the basic functions, making the valve operation easy and labor-saving. When the valve needs to be opened, the manual driving wrench 16 drives the threaded sleeve 15 to rotate. The rotating threaded sleeve 15 converts the torque of the wrench 16 into an upward force to drive the valve stem 3. The valve stem 3 drives the valve core 4 to move upward together, separating the first sealing surface from the second sealing surface, and the valve opens. The flow area between the valve core 4 and the valve seat 2 can be changed according to the on-site descaling requirements to change the flow rate. The high-pressure water enters the water-containing chamber 1a from the water inlet chamber 1b through the throttling channel and the water passing hole 81, and then flows out from the water outlet chamber 1c. When the valve needs to be closed during operation, the manual driving wrench 16 drives the threaded sleeve 15 to rotate. The rotating threaded sleeve 15 converts the torque of the wrench 16 into a downward force to drive the valve stem 3. The valve stem 3 drives the valve core 4 to move downward together, making the first sealing surface abut against the second sealing surface. Since the upward hydraulic pressure is balanced, only a small amount of manpower is required to control the valve.

[0082] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0083] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention.

[0084] In the description of this specification, the descriptions of terms such as "one embodiment" and "one preferred embodiment" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above are only the preferred embodiments of the embodiments of the present utility model and are not used to limit the embodiments of the present utility model. For those skilled in the art, various changes and modifications can be made to the embodiments of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model shall be included within the protection scope of the embodiments of the present utility model.

Claims

1. A manual throttle stop valve, characterized in that: include: The valve body (1) comprises a water containing chamber (1a) and a water inlet chamber (1b) and a water outlet chamber (1c) which are connected to the water containing chamber (1a); A valve seat (2) connected to the water inlet end of the water containing chamber (1a); A valve stem (3), one end of which is located outside the valve body (1) and the other end of which is inserted into the water containing cavity (1a); A valve core (4) is located inside the water containing cavity (1a) and connected to the bottom of the valve stem (3); the bottom of the valve core (4) corresponds to the valve seat (2); and the valve stem (3) can drive the valve core (4) to rise and fall; A throttling structure (5) has one end connected to the bottom of the valve core (4) and the other end which can be inserted into the interior of the valve seat (2) and can move up and down along the axis of the valve seat (2), wherein the throttling structure (5) includes a plurality of throttling channels, the throttling channels can connect the water inlet chamber (1b) and the water containing chamber (1a), and the throttling channels can be configured to have different flow areas for adjusting the water inlet amount.

2. The manual throttle stop valve according to claim 1, characterized in that: The throttling structure (5) comprises a throttling cylinder (51), the top of which is connected to the valve core (4), the throttling cylinder (51) can be inserted into the valve seat (2), and the throttling cylinder (51) and the valve seat (2) are clearance-matched; The throttling cylinder (51) is evenly provided with a plurality of throttling grooves (511) with openings facing downwards along its circumference, and the throttling channel is formed between each of the throttling grooves (511) and the valve seat (2).

3. The manual throttle stop valve according to claim 2, characterized in that: The throttling groove (511) is in an inverted "V" shape.

4. The manual throttle stop valve according to claim 2, characterized in that: It also comprises a lower balancing chamber (1000) and an upper balancing chamber (1001) located above the water containing chamber (1a), wherein the lower balancing chamber (1000), the upper balancing chamber (1001) and the water containing chamber (1a) are not connected to each other, and the valve stem (3) passes through the lower balancing chamber (1000) and the upper balancing chamber (1001); The valve stem (3) is a hollow rod body, and the valve stem (3) is provided with a water inlet hole (31), a lower drainage hole (32) connected to the lower balancing chamber (1000), and an upper drainage hole (33) connected to the upper balancing chamber (1001); the valve core (4) is provided with a water inlet channel (41) connected to the water inlet hole (31) and the water inlet chamber (1b).

5. The manual throttle stop valve according to claim 4, characterized in that: Also includes: A valve cover (6) connected to the top of the valve body (1); A lower guide sleeve (7), the upper portion of which is sleeved on the inner wall of the valve cover (6), and the lower portion of which is inserted into the water containing cavity (1a), and the lower guide sleeve (7) and the valve cover (6) are sealed and connected; A valve sleeve (8) is located in the water containing cavity (1a), connected between the valve cover (6) and the valve seat (2), and the top of the valve sleeve (8) is detachably fixedly connected to the valve cover (6), the valve core (4) is inserted into the valve sleeve (8) and is slidably connected to the middle of the valve sleeve (8), and the valve stem (3) extends upward from the valve core (4) and passes through the valve sleeve (8), the lower guide sleeve (7) and the valve cover (6) in sequence; A first sealing member corresponding to the valve core (4) is provided in the middle of the valve sleeve (8), a second sealing member corresponding to the valve stem (3) is provided on the inner wall of the lower guide sleeve (7), and a lower balancing chamber (1000) is formed between the valve cover (6), the lower guide sleeve (7), the valve sleeve (8) and the valve core (4).

6. The manual throttle stop valve according to claim 5, characterized in that: Also includes: A cylinder (9), the bottom of which is connected to the top of the valve cover (6); A connecting flange (10) is connected to the top of the cylinder (9), and the valve stem (3) extends upward from the water containing chamber (1a) and is inserted into the cylinder (9) and the connecting flange (10) in sequence; An upper guide sleeve (11), the top of which is connected to the connecting flange (10), and the lower part of which is sleeved on the inner circumference of the cylinder (9), wherein the upper guide sleeve (11) and the valve stem (3) are clearance-matched so that the valve stem (3) can slide along the axis of the upper guide sleeve (11); A middle guide sleeve (12) is sleeved on the inner periphery of the cylinder (9) and can slide along the axis of the cylinder (9), and the middle guide sleeve (12) is arranged on the outer periphery of the valve stem (3); A limiting member (13) is connected between the middle guide sleeve (12) and the valve stem (3), and the outer periphery of the limiting member (13) and the inner wall of the cylinder (9) are clearance-matched; The inner circumference of the upper guide sleeve (11) is provided with a third sealing member corresponding to the valve stem (3), the inner circumference of the middle guide sleeve (12) is provided with a fourth sealing member corresponding to the valve stem (3), and the cylinder barrel (9), the upper guide sleeve (11), the middle guide sleeve (12) and the limit member (13) are jointly arranged to form the upper balancing chamber (1001).

7. The manual throttle stop valve according to claim 6, characterized in that: The lower part of the valve sleeve (8) is provided with a water hole (81) connected to the water containing chamber (1a); the middle part of the inner wall of the valve sleeve (8) protrudes inward to form a raised portion; the valve core (4) is slidably connected to the raised portion; and the first sealing member is provided on the inner periphery of the raised portion.

8. The manual throttle stop valve according to claim 6, characterized in that: Also includes: A guide key (14) is connected to the valve stem (3) at one end and to the connecting flange (10) at the other end, wherein the valve stem (3) is provided with a keyway (34) for connecting a guide member, and the connecting flange (10) is provided with a guide groove (101) corresponding to the guide key (14) for guiding the movement of the valve stem (3).

9. The manual throttle stop valve according to claim 7, characterized in that: Also includes: The threaded sleeve (15) is provided with a threaded hole (150) penetrating in the axial direction, the valve stem (3) is inserted into the threaded hole (150) and is threadedly connected thereto, and a first step is provided on the upper part of the threaded sleeve (15); A wrench (16) is connected to the first step and is used to drive the threaded sleeve (15) to rotate.

10. The manual throttle stop valve according to claim 9, characterized in that: A limiting protrusion (151) protruding outward is provided in the middle of the threaded sleeve (15), and a first bearing (17) and a second bearing (18) are provided inside the connecting flange (10). The first bearing (17) and the second bearing (18) are respectively sleeved on the outer circumference of the threaded sleeve (15), and the top of the first bearing (17) abuts against the limiting protrusion (151), and the bottom of the second bearing (18) abuts against the limiting protrusion (151); A fastening nut (19) is provided on the top of the connecting flange (10), and the fastening nut (19) is sleeved on the outer periphery of the threaded sleeve (15) and its bottom abuts against the top of the second bearing (18).

Images