Torque overload protection hand wheel and valve

Abstract

According to the torque overload protection hand wheel and the valve, the driving disc of the driving unit and the driven disc of the driven unit are coaxially arranged in the mounting cavity and make rolling contact, and the driven disc and the driving disc are elastically connected through the disc spring assembly of the disc spring unit; a ball-disc spring type structure is additionally arranged on the hand wheel operation ring, so that overload protection of the hand wheel in the operation process is achieved. When the operation torque is too large, the torque protection function is triggered, and the hand wheel idles. Therefore, the valve with the torque overload protection hand wheel fundamentally eliminates the defect of valve clack crushing caused by large operating force of the hand wheel, reduces the failure rate of the valve, improves the reliability of the diaphragm valve, prolongs the service life of the diaphragm valve, and reduces the maintenance cost of the diaphragm valve. And for a radioactive medium valve, the exposure dose of maintenance personnel is reduced, radioactive waste generated due to damage of the valve clack is reduced, and the solid waste treatment cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm valves, and in particular to a torque overload protection hand wheel and a valve. Background Art

[0002] A handwheel is a mechanical device that is usually used to manually operate the rotation of a device or mechanical part. It provides an interface that can be turned manually, allowing the operator to control the device or valve connected to it by applying force.

[0003] Diaphragm valves are used as isolation valves in nuclear power plant systems. The valve disc uses a rubber valve core, and most of the operation methods use a rotating valve handwheel to open, close or adjust the valve. In order to ensure the reliability of system isolation, operators usually use a large force to operate the valve handwheel. The rubber disc of the diaphragm valve is often crushed due to excessive operating force, and the valve seal fails. Nuclear power plants generally have a high defect rate of manual diaphragm valves, and the majority of valve failures are caused by disc crushing.

[0004] The current measures mainly involve developing a set of systematic maintenance strategies and plans. Through regular maintenance and inspection, valve failures can be prevented, service life can be extended, and reliability can be improved, thereby reducing accidents and maintenance costs. It mainly includes the following aspects: (1) Regular inspection: According to the operating characteristics and historical data of the valve, a regular inspection schedule is set to conduct scheduled inspections and tests, such as temperature, pressure, vibration and other indicators. (2) Maintenance tasks: Specific maintenance tasks are formulated for different types of equipment and their valves, and the operations that need to be performed are clearly defined, such as lubrication, cleaning, adjustment, etc. (3) Recording and evaluation: After each maintenance, detailed records are made, including maintenance content, test results, materials used, time spent, etc., to facilitate subsequent evaluation and analysis. (4) Risk assessment: By analyzing operating data, possible risk points are evaluated, so as to formulate corresponding maintenance plans and key inspection contents.

[0005] The above preventive maintenance strategy can significantly reduce the frequency of failures and improve the overall protection level of valve equipment, but it increases the cost of maintenance and may also lead to inconsistency between planned maintenance and actual needs. At the same time, preventive maintenance mainly focuses on regular maintenance and cannot completely prevent valve sealing failure caused by operating errors.

[0006] Therefore, it is necessary to design a torque overload protection handwheel and valve to solve the problem of valve disc collapse and valve seal failure caused by excessive torque. Summary of the invention

[0007] In view of some of the shortcomings of the above-mentioned prior art, the present invention provides a torque overload protection handwheel and valve, which adopt rolling-floating contact between the driving plate and the driven plate to achieve overload protection of the handwheel during operation, improve the reliability of the valve, and reduce the maintenance cost of the valve.

[0008] To achieve the above-mentioned purpose and other related purposes, the present invention provides a torque overload protection handwheel, comprising:

[0009] A driving unit, the driving unit comprises a driving sleeve and a driving disc, the driving disc is mounted on a first end of the driving sleeve, and an internal space of the driving sleeve away from the first end thereof forms a mounting cavity;

[0010] A driven unit, the driven unit comprises a driven disc and a transmission sleeve, the transmission sleeve is arranged in the installation cavity, and the driven disc is sleeved outside the transmission sleeve and is rollingly connected with the driving disc;

[0011] The disc spring unit includes a disc spring assembly, which is arranged in the installation cavity and located on a side of the driven disc away from the driving disc;

[0012] Wherein, a hand wheel operating ring is fixedly sleeved outside the driving sleeve.

[0013] As one embodiment of the present invention, it also includes a ball assembly, which includes a retaining frame and balls evenly arranged on the retaining frame. The retaining frame is arranged between the driven plate and the driving plate, and the opposite two ends of each ball are respectively pressed into the spherical groove on the driven plate and the corresponding spherical groove on the driving plate.

[0014] As one embodiment of the present invention, the disc spring unit also includes a disc spring pressure plate and a clamping nut. The disc spring pressure plate is arranged at one end of the disc spring assembly away from the driven disk. The clamping nut is threadedly connected to the transmission sleeve, and the outer boss of the clamping nut is pressed on the disc spring pressure plate.

[0015] As one embodiment of the present invention, a slide groove is provided on the inner cylindrical surface of the driving sleeve along its axial direction, the disc spring pressure plate is sleeved outside the clamping nut, and a sliding block cooperating with the slide groove is convexly provided on the outer cylindrical surface of the disc spring pressure plate.

[0016] As one embodiment of the present invention, a sink is provided in the middle through hole of the driving disk for positioning the first end of the transmission sleeve, and a positioning boss is provided at one end of the driving disk close to the driven disk for positioning the mounting bracket.

[0017] As one of the embodiments of the present invention, it also includes at least two groups of limit assemblies, each group of limit assemblies includes a limit pin and a cylindrical spring, the cylindrical spring is sleeved on the limit pin, the limit pin passes through the side wall of the driving sleeve, and the corresponding end of the limit pin rests on the outer wall of the sinking platform of the driven disk close to one end of the driving disk.

[0018] As one embodiment of the present invention, each set of limiting components also includes a pulling piece and a baffle. The baffle is fixedly mounted on the positioning plane of the outer wall of the driving sleeve. The other end of the limiting pin passes through the side wall cavity and the baffle and is provided with a pulling piece.

[0019] As one embodiment of the present invention, it also includes a support plate, which is arranged at one end of the driving disk away from the driven disk and is fixedly connected to the driving sleeve accordingly.

[0020] As one embodiment of the present invention, an end cover is provided at the second end of the driving sleeve, and the second end of the transmission sleeve is pressed against the inner side of the end cover through a friction-reducing pad; a window is provided on the end cover, and the outer boss of the clamping nut is operated through the window.

[0021] As one embodiment of the present invention, the present invention includes a shut-off valve, including a valve body and a valve shaft, and also includes the above-mentioned torque overload protection handwheel, the valve shaft is inserted into a transmission sleeve of the torque overload protection handwheel and fixedly connected thereto.

[0022] The beneficial technical effects of the present invention include at least:

[0023] (1) A torque overload protection handwheel and valve of the present invention, the driving disc of the driving unit and the driven disc of the driven unit are arranged in the installation cavity and are connected in a rolling manner. When the driven disc and the driving disc are connected in a rolling manner, the disc spring assembly of the disc spring unit provides a pressing force to ensure close contact between the two and effectively transmit torque. When the driven disc and the driving disc are separated and need to be reset, the disc spring assembly provides a thrust to the driven disc, and the ball falls back into the spherical groove on the end surface of the driving disc and the driven disc by relying on the thrust transmitted by the driven disc and its own gravity, re-realizing the rolling connection between the driven disc and the driving disc, and resetting the torque transmission function; by adding a ball-disc spring structure to the handwheel operating ring, the overload protection of the handwheel during operation is realized. When the operating torque is too large, the torque protection function will be triggered and the handwheel will idle; the ball-disc spring type dynamic load torque protection is adopted, so that the axial component of the handwheel operating force does not directly act on the disc spring assembly, which can not only balance the wear of the ball, but also improve the accuracy of the torque overload protection value. Therefore, valves with torque overload protection handwheels fundamentally eliminate the valve disc crushing defect caused by large handwheel operating force, reduce valve failure rate, improve the reliability and life of diaphragm valves, and reduce diaphragm valve maintenance costs. For valves with radioactive media, it reduces the radiation dose of maintenance personnel, reduces the radioactive waste generated by valve disc damage, and reduces the cost of solid waste treatment.

[0024] (2) A torque overload protection handwheel and valve of the present invention also include a limit assembly. When the handwheel is overloaded, the driven disk is limited to the initial position when it is separated from the ball, thereby reducing the wear of the ball and increasing the service life of the handwheel.

[0025] (3) The disc spring unit of a torque overload protection handwheel and valve of the present invention also includes a disc spring pressure plate and a clamping nut. The magnitude of the torque transmitted by the handwheel is controlled by tightening or loosening the clamping nut. The torque adjustment range is wide and can be adjusted according to the magnitude of the valve switching torque. It can adapt to valves of various calibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A sectional view of a torque overload protection handwheel and a valve provided in one embodiment of the present invention;

[0027] Figure 2 A cross-sectional view of a drive disk provided in one embodiment of the present invention;

[0028] Figure 3 A cross-sectional view of a driven disk provided in one embodiment of the present invention;

[0029] Figure 4 4-1 is a cross-sectional view of a drive sleeve provided in one embodiment of the present invention, and 4-2 is a top view of the drive sleeve;

[0030] Figure 5 5-1 is a cross-sectional view of a disc spring pressure plate provided by an embodiment of the present invention, and 5-2 is a top view of the disc spring pressure plate;

[0031] Figure 6 A schematic diagram of the structure of a limiter assembly provided in one embodiment of the present invention;

[0032] Figure 7 7-1 is a cross-sectional view of a clamping nut provided in one embodiment of the present invention, and 7-2 is a top view of the clamping nut;

[0033] Figure 8 8-1 is a cross-sectional view of an end cover provided in one embodiment of the present invention, and 8-2 is a top view of the end cover.

[0034] Component Symbols:

[0035] Handwheel operating ring 10, drive unit 1, drive sleeve 11, slide groove 111, side wall cavity 112, drive disk 12, sinking platform 121, positioning boss 122, driven unit 2, driven disk 21, second positioning groove 211, sinking platform 212, transmission sleeve 22, disc spring unit 3, disc spring assembly 31, disc spring pressure plate 32, slider 321, 322 first positioning groove, clamping nut 33, outer boss 331, spherical groove 40, ball assembly 4, retaining frame 41, ball 42, limit assembly 5, limit pin 51, cylindrical spring 52, pulling piece 53, baffle 54, support plate 6, end cover 7, friction reducing pad 71, window 72, valve shaft 8. DETAILED DESCRIPTION

[0036] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0037] See also Figures 1 to 8 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0038] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any method, device and material of the prior art similar or equivalent to the method, device and material in the embodiments of the present invention can also be used to implement the present invention.

[0039] See also Figure 1In order to achieve the above-mentioned purpose and other related purposes, the present invention provides a torque overload protection handwheel, including a driving unit 1, a driven unit 2 and a disc spring unit 3. The driving unit 1 includes a driving sleeve 11 and a driving disc 12. The driving disc 12 is coaxially mounted on the first end of the driving sleeve 11, and the internal space of the driving sleeve 11 away from the first end thereof forms an installation cavity; the driven unit 2 includes a driven disc 21 and a transmission sleeve 22. The transmission sleeve 22 is coaxially arranged in the installation cavity, and the driven disc 21 is sleeved outside the transmission sleeve 22 and is correspondingly connected to the driving disc 12 in a rolling manner; the disc spring unit 3 includes a disc spring assembly 31, which is arranged in the installation cavity and is located on the side of the driven disc 21 away from the driving disc 12; wherein a handwheel operating ring 10 is fixedly sleeved on the outside of the driving sleeve 11.

[0040] It should be noted that the driving disc 12 of the driving unit 1 and the driven disc 21 of the driven unit 2 of the above-mentioned torque overload protection handwheel are coaxially arranged in the installation cavity and rollingly connected. The disc spring assembly 31 of the disc spring unit 3 provides a preload force to press the driven disc 21 and the driving disc 12, effectively transmitting the torque. When the driven disc 12 and the driving disc 12 are out of contact and need to restore the rolling connection, the disc spring assembly 31 provides a thrust to make the driven disc 12 and the driving disc 12 re-realize the rolling connection, and the torque transmission function is reset; therefore, by adding a ball-disc spring structure to the handwheel operating ring 10, the overload protection of the handwheel during operation is realized. The problem that the conventional handwheel structure cannot provide torque overload protection is solved, and the risk of damage to the valve disc (including the diaphragm valve) due to excessive force applied by the handwheel is reduced, resulting in valve seal failure.

[0041] As one of the embodiments of the present invention, it also includes a ball assembly 4, which includes a retaining frame 41 and balls 42 evenly arranged on the retaining frame 41, the retaining frame 41 is arranged between the driven disk 21 and the driving disk 12, and the opposite two ends of each ball 42 are respectively pressed into the spherical groove 40 on the driven disk 21 and the corresponding spherical groove 40 on the driving disk 12.

[0042] As one of the embodiments of the present invention, the disc spring unit 3 also includes a disc spring pressure plate 32 and a clamping nut 33. The disc spring pressure plate 32 is arranged at the end of the disc spring assembly 31 away from the driven disk 21. The clamping nut 33 is threadedly connected to the transmission sleeve 22, and the outer boss 331 of the clamping nut 33 is pressed on the disc spring pressure plate 32.

[0043] See also Figure 4 and Figure 5 As one embodiment of the present invention, a slide groove 111 is provided on the inner cylindrical surface of the driving sleeve 11 along its axial direction, a disc spring pressure plate 32 is sleeved outside the clamping nut 33, and a slider 321 is convexly provided on the outer cylindrical surface of the disc spring pressure plate 32 to cooperate with the slide groove 111. The disc spring assembly 31 is a single or multiple butterfly springs connected in series.

[0044] It should be noted that the drive sleeve 11 is a cylindrical body, and a plane structure is milled at a 180-degree symmetrical position on the outer cylindrical surface for processing the side wall cavity 112. Two sets of limit assemblies 5 are symmetrically inserted in the side wall cavities 112 at both ends of the radial direction of the drive sleeve 11; a groove structure is processed at a 180-degree symmetrical position on the upper part of the inner cylindrical surface of the drive sleeve 11, which is used to cooperate with the slider 321 of the disc spring pressure plate 32 to limit the circumferential position of the disc spring pressure plate 32; an internal spline is processed at the minimum size part of the inner cylinder of the drive sleeve 11, which is connected to the external spline of the drive disc 12. An internal thread structure is processed at the lower part of the inner cylinder of the drive sleeve 11, which is connected to the external thread of the support plate 6.

[0045] See also Figure 2 and Figure 3 As one embodiment of the present invention, a sink 121 is provided in the middle through hole of the driving disk 12 for positioning the first end of the transmission sleeve 22, and a positioning boss 122 is provided at the end close to the driven disk 21 for positioning and installing the retainer 41; a second positioning groove 211 is provided at the end of the driven disk 21 away from the driving disk 12, and a first positioning groove 322 is provided at the end of the disc spring pressure plate 32 corresponding to the disc spring assembly 31. The second positioning groove 211 and the first positioning groove 322 cooperate to axially position the disc spring assembly 31; spherical grooves 40 are respectively provided at the close ends of the driving disk 12 and the driven disk 21 corresponding to the ball 42.

[0046] It should be noted that the upper end surface of the driving disc 12 is provided with hemispherical spherical grooves 40, which are equal in number to the balls 42 and evenly distributed along the circumference thereof, and the groove surface diameter of the spherical grooves 40 is the same as the diameter of the balls 42; the outer cylindrical surface of the driving disc 12 is processed with an external spline structure, which is connected to the inner spline of the driving sleeve 11. The upper part of the driving disc 12 has a positioning boss 122, and the outer cylindrical surface of the positioning boss 122 is used for the installation and positioning of the retainer 41.

[0047] The lower end surface of the driven disk 21 is provided with hemispherical spherical grooves 40, the number of which is equal to that of the balls 42 and uniformly distributed along its circumference, and the groove surface diameter of the spherical grooves 40 is the same as the diameter of the balls 42; the inner cylindrical surface of the driven disk 21 is processed with an internal spline structure, which is connected to the external spline of the transmission sleeve 22; the driven disk 21 is close to the driving disk 12 end. The sinking platform 212 has a height that is consistent with the spherical groove depth of 40 degrees. When the driven disk 21 moves upward to disengage from the balls 42, the pulling piece 53 is clamped on the outer wall of the sinking platform 212 under the action of the cylindrical spring 52.

[0048] The retainer 41 adopts a ball retainer structure of a thrust ball bearing, which reduces the processing and manufacturing cost of the handwheel.

[0049] See also Figure 6As one embodiment of the present invention, it also includes at least two groups of limit assemblies 5, each group of limit assemblies 5 includes a limit pin 51 and a cylindrical spring 52, the cylindrical spring 52 is sleeved on the limit pin 51, the limit pin 51 passes through the side wall of the driving sleeve 11, and the corresponding end of the limit pin 51 abuts against the outer wall of the sinking platform 212 of the driven disk 21 close to the driving disk 12.

[0050] As one of the embodiments of the present invention, it includes two groups of limit assemblies 5, which are symmetrically inserted into the side wall cavities 112 at the radial ends of the driving sleeve 11, and each group of limit assemblies 5 also includes a pulling piece 53 and a baffle 54. The baffle 54 is fixedly installed on the positioning plane of the outer wall of the driving sleeve 11, and the other end of the limit pin 51 passes through the side wall cavity 112 and the baffle 54 and is provided with a pulling piece 53.

[0051] It should be noted that the limit pin 51 and the cylindrical spring 52 are installed in the side wall cavity 112 of the driving sleeve 11, and the baffle 54 is connected to the outside of the driving sleeve 11 with screws. When the driven disk 21 moves upward to disengage from the ball 42, the limit pin 51 is stuck on the sinking platform 212 on the outer cylindrical surface of the driven disk 21 under the action of the spring force, and the driven disk 21 is limited to the initial height of disengagement from the ball 42.

[0052] As one embodiment of the present invention, it further includes a support plate 6 , which is coaxially arranged at one end of the driving disc 12 away from the driven disc 21 and fixedly connected to the driving sleeve 11 .

[0053] It should be noted that the outer cylindrical surface of the support plate 6 is a threaded surface, and the center hole is used to pass the valve shaft 8 or the connecting shaft. Four through holes are evenly distributed along the center circumference of the support plate 6, which are used for the operating process holes for screwing the external thread of the support plate 6 into the internal thread of the drive sleeve 11.

[0054] See also Figure 7 and Figure 8 As one embodiment of the present invention, the second end of the driving sleeve 11 is provided with an end cover 7, and the second end of the transmission sleeve 22 is pressed against the inner side of the end cover 7 through a friction-reducing pad 71; a window 72 is opened on the end cover 7, and the outer boss 331 of the clamping nut 33 is operated through the window 72 to tighten or loosen the clamping nut 33.

[0055] It should be noted that the outer circle of the clamping nut 33 is processed with 8 groove structures distributed along the circumferential direction, which are used to loosen or tighten the clamping nut 33. There are four windows 72 on the end cover 7 of the hand wheel, which are used to tighten or loosen the clamping nut 33.

[0056] As one embodiment of the present invention, the present invention includes a valve, including a valve body and a valve shaft 8, and also includes the above-mentioned hand wheel, the valve shaft 8 is coaxially inserted in the transmission sleeve 22 of the hand wheel and fixedly connected thereto. The overload protection of the hand wheel during operation, when the valve is a diaphragm valve, prevents the diaphragm valve rubber valve disc from being crushed and causing the valve seal to fail, thereby improving the reliability of the valve and reducing the maintenance cost.

[0057] Handwheel operating ring 10, drive unit 1, drive sleeve 11, slide groove 111, side wall cavity 112, drive disk 12, sinking platform 121, positioning boss 122, driven unit 2, driven disk 21, second positioning groove 211, sinking platform 212, transmission sleeve 22, disc spring unit 3, disc spring assembly 31, disc spring pressure plate 32, slider 321, 322 first positioning groove, clamping nut 33, outer boss 331, spherical groove 40, ball assembly 4, retaining frame 41, ball 42, limit assembly 5, limit pin 51, cylindrical spring 52, pulling piece 53, baffle 54, support plate 6, end cover 7, friction reducing pad 71, window 72, valve shaft 8.

[0058] In summary, the working principle of the valve of the present invention is:

[0059] The overload protection handwheel is installed on the valve shaft 8 of the valve, and the key connection structure between the valve shaft 8 and the transmission sleeve 22 is used as an example. By rotating the handwheel operating ring 10, the drive sleeve 11 and the drive disk 2 are driven to rotate. The rotating handwheel operating ring 10 and the drive sleeve 11 are rigidly connected, and the drive sleeve 11 and the drive disk 2 are splined; the drive disk 2 drives the retainer 41 to rotate, and the upper end surface of the drive disk 2 has evenly distributed spherical grooves 40, which match the outer spherical surface of the ball 42; the rotation of the retainer 41 drives the driven disk 21 to rotate, and the lower end surface of the driven disk 21 has evenly distributed spherical grooves 40, which match the outer spherical surface of the ball 42 The driven disc 21 drives the transmission sleeve 22 to rotate, and the driven disc 21 and the transmission sleeve 22 are connected by splines; when the force acting on the handwheel operating ring 10, i.e. the handwheel, is too large, the driven disc 21 squeezes the upper disc spring assembly 31, and when the lower end surface of the driven disc is separated from the ball 42, the limit pin 51 is clamped on the side wall of the sinking platform 212 on the outer cylindrical surface of the driven disc 21 under the action of the cylindrical spring 52, and the driven disc 21 is separated from the ball assembly 4, the driving disc 12 is in an idling state, and the torque overload protection takes effect. Pull out the puller 53, and rotate the handwheel operating ring 10 at the same time, so that the ball 42 of the ball assembly 4 falls into the spherical groove 40 on the end surface of the driving disc 12 and the driven disc 21, and the torque transmission function is reset. The magnitude of the handwheel transmission torque is controlled by tightening or loosening the clamping nut 33. When the clamping nut 33 rotates clockwise, the disc spring assembly 31 is compressed and the handwheel transmission torque increases. Conversely, when the clamping nut 33 rotates clockwise or counterclockwise, the disc spring assembly 31 is extended and the handwheel transmission torque decreases.

[0060] With such a design, the rotation of the handwheel can work normally within a safe range, and in the case of overload, the load transmitted to the valve is reduced by the deformation of the disc spring assembly 31, thereby achieving the purpose of valve overload protection.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A torque overload protection handwheel, characterized in that: include: A drive unit (1), the drive unit (1) comprising a drive sleeve (11) and a drive disc (12), the drive disc (12) being mounted on a first end of the drive sleeve (11), and an internal space of the drive sleeve (11) away from the first end thereof forming a mounting cavity; A driven unit (2), the driven unit (2) comprising a driven disc (21) and a transmission sleeve (22), the transmission sleeve (22) being arranged in the mounting cavity, and the driven disc (21) being sleeved outside the transmission sleeve (22) and being rollingly connected to the driving disc (12); A disc spring unit (3), the disc spring unit (3) comprising a disc spring assembly (31), the disc spring assembly (31) being arranged in the installation cavity and located on a side of the driven disc (21) away from the driving disc (12); Wherein, a hand wheel operating ring (10) is fixedly sleeved outside the driving sleeve (11).

2. The torque overload protection handwheel according to claim 1, characterized in that: The invention also comprises a ball assembly (4), wherein the ball assembly (4) comprises a retaining frame (41) and balls (42) uniformly arranged on the retaining frame (41), wherein the retaining frame (41) is arranged between the driven disk (21) and the driving disk (12), and the opposite two ends of each ball (42) are respectively pressed into a spherical groove (40) on the driven disk (21) and a corresponding spherical groove (40) on the driving disk (12).

3. The torque overload protection handwheel according to claim 2, characterized in that: The disc spring unit (3) also includes a disc spring pressure plate (32) and a clamping nut (33); the disc spring pressure plate (32) is arranged at one end of the disc spring assembly (31) away from the driven disk (21); the clamping nut (33) and the transmission sleeve (22) are threadedly connected; and the outer boss (331) of the clamping nut (33) is pressed onto the disc spring pressure plate (32).

4. The torque overload protection handwheel according to claim 3, characterized in that: A slide groove (111) is provided on the inner cylindrical surface of the driving sleeve (11) along its axial direction, the disc spring pressure plate (32) is sleeved outside the clamping nut (33), and a sliding block (321) that cooperates with the slide groove (111) is convexly provided on the outer cylindrical surface of the disc spring pressure plate (32).

5. The torque overload protection handwheel according to claim 4, characterized in that: A sink (121) is provided in the middle through hole of the driving disk (12) for positioning the first end of the transmission sleeve (22), and a positioning boss (122) is provided at one end of the driving disk (12) close to the driven disk (21) for positioning and installing the retaining frame (41).

6. The torque overload protection handwheel according to claim 5, characterized in that: The invention also comprises at least two groups of limit assemblies (5), each group of the limit assemblies (5) comprises a limit pin (51) and a cylindrical spring (52), the cylindrical spring (52) being sleeved on the limit pin (51), the limit pin (51) passing through the side wall of the driving sleeve (11), and a corresponding end of the limit pin (51) abutting against an outer side wall of a sinking platform (212) at one end of the driven disk (21) close to the driving disk (12).

7. The torque overload protection handwheel according to claim 6, characterized in that: Each group of the limiting components (5) further comprises a pulling member (53) and a baffle (54), wherein the baffle (54) is fixedly mounted on a positioning plane of the outer wall of the driving sleeve (11), and the other end of the limiting pin shaft (51) passes through the side wall cavity (112) and the baffle (54) and is provided with the pulling member (53).

8. The torque overload protection handwheel according to claim 7, characterized in that: It also includes a support plate (6), which is arranged at one end of the driving disk (12) away from the driven disk (21) and is fixedly connected to the driving sleeve (11) accordingly.

9. The torque overload protection handwheel according to claim 8, characterized in that: The second end of the driving sleeve (11) is provided with an end cover (7), and the second end of the transmission sleeve (22) is pressed against the inner side of the end cover (7) through a friction-reducing pad (71); a window (72) is provided on the end cover (7), and the outer boss (331) of the clamping nut (33) is operated through the window (72).

10. A valve, comprising a valve body and a valve shaft (8), characterized in that: It also comprises a torque overload protection handwheel as claimed in any one of claims 1 to 9, wherein the valve shaft (8) is inserted into a transmission sleeve (22) of the torque overload protection handwheel and is fixedly connected thereto.

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