A full metal angle valve

Abstract

The present application discloses an all-metal angle valve, which includes: a valve body and a first rotating body, a second rotating body, a third rotating body, a valve core assembly and an elastic member located in the valve body. The first rotating body, the second rotating body and the third rotating body are coaxially installed in sequence. The first rotating body and the valve body can cooperate in axial thrust rotation. The first rotating body and the second rotating body can cooperate in unidirectional fixed torque separation. The second rotating body and the third rotating body can cooperate in axial sliding rotation. The elastic member is pressed between the second rotating body and the third rotating body. The valve core assembly is screwed to the third rotating body and can reciprocate along the axis of the third rotating body. The present application limits the magnitude of the torsional force on the first rotating body by pressing the elastic member and the unidirectional fixed torque separation of the first rotating body and the second rotating body, so as to avoid accidental scrapping of the angle valve.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-high vacuum, and in particular to an all-metal angle valve. Background Art

[0002] All-metal angle valve is an indispensable valve in vacuum system and is widely used in aerospace, accelerator, electronics, semiconductor, vacuum system, energy, machinery and other industrial fields or scientific research fields.

[0003] All-metal valves are sealed with butterfly seals, which have relatively high elasticity and rigidity requirements. When the butterfly seal is pre-tightened, if the operator uses a large force to achieve ultra-high vacuum sealing, a larger force must be used to seal again, which may cause the valve to be scrapped.

[0004] In order to solve the problem of pre-tightening affecting the life of all-metal valves, the operator should record the pre-tightening force value to avoid valve scrapping. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide.

[0006] The present application provides an all-metal angle valve, which comprises: a valve body and a first rotating body, a second rotating body, a third rotating body, a valve core assembly and an elastic member located in the valve body.

[0007] The first rotating body, the second rotating body and the third rotating body are coaxially installed in sequence, and the first rotating body and the valve body can be axially thrust-rotatably matched.

[0008] The first rotating body and the second rotating body are separated and matched with one-way fixed torque force,

[0009] The second rotating body and the third rotating body are axially sliding and anti-rotationally engaged.

[0010] The elastic member is press-fitted between the second rotating body and the third rotating body.

[0011] The valve core assembly is threadedly connected to the third rotating body and can reciprocate along the axis of the third rotating body.

[0012] As an optional scheme, a first meshing tooth is provided on the end surface of the first rotating body facing the second rotating body; a second meshing tooth is provided on the end surface of the second rotating body facing the first rotating body, the first meshing tooth and the second meshing tooth are in surface contact, and the contact surface is inclined relative to the axis of the first rotating body; there are a plurality of first meshing teeth arranged in a ring shape, and the first meshing teeth extend along the radial direction of the first rotating body; there are a plurality of second meshing teeth arranged in a ring shape, and the second meshing teeth extend along the radial direction of the second rotating body.

[0013] As an optional scheme, the second rotating body is provided with a second through hole, and the third rotating body passes through the second through hole. One of the second through hole and the third rotating body is provided with a slider, and the other is provided with a slide groove cooperating with the slider, and the slide groove extends along the axis of the second rotating body or the axis of the third rotating body.

[0014] As an optional solution, a plurality of the sliders arranged in an annular shape are protruded from the inner wall of the second through hole, and a plurality of the slide grooves arranged in an annular shape are recessed on the side wall of the third rotating body, and the slide grooves extend along the axial direction of the third rotating body.

[0015] As an optional solution, the first rotating body is provided with a first through hole, and the third rotating body passes through the second and first through holes in sequence, and the distance between the second rotating body and the third rotating body is limited by a locking member so that the elastic member can be press-fitted.

[0016] As an optional solution, the locking member is a stop nut, the third rotating body protrudes out of the first through hole, and a portion of the third rotating body protruding out of the first through hole is threadedly connected to the stop nut.

[0017] As an optional solution, the side wall of the third rotating body toward the end of the valve core assembly extends radially outward and toward the second rotating body to form a first embedding slot, and the elastic member is embedded in the first embedding slot, or / and,

[0018] The end surface of the second rotating body facing away from the first rotating body is recessed to form a second embedding slot, and the elastic member is embedded in the second embedding slot.

[0019] As an optional scheme, the valve core assembly includes a first surface and a second surface arranged opposite to each other and a side surface connecting the first surface and the second surface, the side surface is used to seal the inlet or outlet of the valve body, the second surface is close to the inlet or outlet of the valve body, the orthographic projection of the second surface on the first surface does not completely cover the first surface, and the side surface is a tapered curved surface.

[0020] As an optional solution, the end of the third rotating body is recessed toward the valve core assembly to form a threaded hole, and the valve core assembly includes a valve core and a screw, and the screw is arranged along the axis of the third rotating body. The threaded hole is axially slidingly engaged with one end of the screw to enable the screw to reciprocate along the axis of the third rotating body, and the other end of the screw is threadedly connected to the valve core.

[0021] As an optional solution, the threaded hole and one end of the screw rod are axially slidably locked by a locking block, the locking block is connected to the inner wall of the valve body, the side wall of the screw rod is provided with a groove extending along its axis, the locking block is inserted into the groove, and the screw rod is connected to the threaded hole; or,

[0022] The threaded hole and one end of the screw rod are matched with each other through axial sliding and anti-rotation of a ball, the screw rod and the threaded hole are connected, and the ball is arranged in a spiral raceway formed by the screw rod and the threaded hole.

[0023] The present application limits the magnitude of the torsional force applied to the first rotating body by means of a press-fit elastic member and a one-way fixed torque separation between the first rotating body and the second rotating body. When the torsional force is less than a preset value, the valve core assembly can block the fluid; when the torsional force is greater than or equal to the preset value, the valve core assembly cannot block the fluid, thereby avoiding accidental scrapping of the angle valve. The operation is simple and convenient. The surface contact is conducive to the first meshing tooth to stably apply a force to the second meshing tooth, and the inclined setting of the surface contact can limit the magnitude of the torsional force. The second rotating body and the third rotating body are matched by a slider and a slide groove to achieve axial sliding anti-rotation cooperation, and the structure is simple, compact, and easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 is a cross-sectional view of an all-metal angle valve provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the first rotating body provided in an embodiment of the present invention

[0027] Figure 3 is a schematic structural diagram of a second rotating body provided in an embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of a third rotating body provided in an embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of a structure of a second meshing tooth provided by an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of another second meshing tooth structure provided by an embodiment of the present invention;

[0031] Figure 7 is a schematic diagram of another second meshing tooth structure provided by an embodiment of the present invention;

[0032] Figure 8is a schematic structural diagram of a valve core member provided by an embodiment of the present invention;

[0033] Fig. 9 is a schematic structural diagram of the connection between the first, second and third rotating bodies provided by an embodiment of the present invention;

[0034] Fig.10 is a schematic structural diagram of the connection between the third rotating body and the valve core assembly provided by an embodiment of the present invention;

[0035] Fig.11 yes Figure 1 A is a partial enlarged view of the DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0039] Figures 1 to 4 An all-metal angle valve is shown, wherein Figure 1 A schematic structural diagram of an all-metal angle valve provided by an embodiment of the present invention is shown; Figure 2 The structure schematic diagram of the first rotating body 20 provided in the embodiment of the present invention is shown; Figure 3 The structure diagram of the second rotating body 30 provided in the embodiment of the present invention is shown; Figure 4 FIG. 1 is a schematic structural diagram of a third rotating body 60 provided in an embodiment of the present invention.

[0040] A full metal angle valve comprises: a valve body 10 and a first rotating body 20, a second rotating body 30, a third rotating body 60, a valve core assembly 50 and an elastic member 40 located in the valve body 10. The first rotating body 20, the second rotating body 30 and the third rotating body 60 are coaxially installed in sequence, the first rotating body 20 and the valve body 10 can be axially thrust-rotationally matched, the first rotating body 20 and the second rotating body 30 are unidirectionally torque-separated, the second rotating body 30 and the third rotating body 60 are axially sliding and rotationally matched, the elastic member 40 is pressed between the second rotating body 30 and the third rotating body 60, the valve core assembly 50 is screwed to the third rotating body 60, and can reciprocate along the axis of the third rotating body 60.

[0041] It should be noted that the valve body 10 includes an upper shell 11 and a lower shell 12, which are connected by a flange, wherein the upper shell 11 and the lower shell 12 are sealed by an oxygen-free copper gasket. The valve body 10 has an inlet 121 and an outlet 122, which are located in two directions and arranged at a preset angle. Figure 1 As shown, the inlet 121 and the outlet 122 are located on the lower shell 12 , and the inlet 121 and the outlet 122 are 90 degrees apart. The inlet 121 is located in the first direction X, and the outlet 122 is located in the second direction Y.

[0042] The first rotating body 20, the second rotating body 30, and the third rotating body 60 are sequentially coaxially installed, that is, the first rotating body 20, the second rotating body 30, and the third rotating body 60 are sequentially arranged, and the axis of the first rotating body 20, the axis of the second rotating body 30, and the axis of the third rotating body 60 are all located on the same straight line. The direction in which the same straight line extends is defined as the first direction, that is, the axes of the first, second, and third rotating bodies also extend along the first direction. It should be noted that the direction in which the same straight line extends can also be the second direction.

[0043] The first rotating body 20 and the valve body 10 can be axially thrust-rotatably matched, which can be understood as the valve body 10 being stationary, the first rotating body 20 rotating relative to the valve body 10, and the first rotating body 20 not moving along the first direction. Figure 1 As shown, the first rotating body 20 is connected to the upper shell 11 of the valve body 10 through a thrust bearing.

[0044] The first rotating body 20 and the second rotating body 30 are separated and cooperated with each other in a unidirectional fixed torque, which can be understood as the first rotating body 20 is only subjected to torsion in a single direction, and the second rotating body 30 is subjected to a force along the first direction. When the force is less than the preset force, the first rotating body 20 drives the second rotating body 30 to rotate; when the force is greater than or equal to the preset force, the first rotating body 20 idles and the second rotating body 30 is stationary.

[0045] The second rotating body 30 and the third rotating body 60 are axially sliding and anti-rotatingly matched, which can be understood as the third rotating body 60 is stationary, the second rotating body 30 moves along the first direction relative to the third rotating body 60, and the second rotating body 30 can rotate relative to the first direction.

[0046] The valve core assembly 50 is threadedly connected to the third rotating body 60 and can reciprocate along the axis of the third rotating body 60. It can be understood that the valve core assembly 50 is arranged along the axis of the third rotating body 60, the valve core assembly 50 is threadedly connected to the third rotating body 60, the third rotating body 60 rotates to drive the valve core assembly 50 to reciprocate along the first direction, and the valve core assembly 50 cannot rotate by itself, and the valve core assembly 50 can close the inlet 121. It should be noted that if the same straight line extends in the second direction, the valve core assembly 50 can close the outlet 122.

[0047] The working principle of the all-metal angle valve is as follows: first, the elastic member 40 is pressed between the second rotating body 30 and the third rotating body 60 with a pre-tightening force; then, the first rotating body 20 is twisted with a torsional force, and the first rotating body 20 rotates relative to the first direction. If the component of the torsional force in the first direction is smaller than the pre-tightening force, the component is opposite to the direction of the pre-tightening force, the pre-tightening force supports the second rotating body 30, and the position of the second rotating body 30 relative to the first rotating body 20 remains unchanged, then the first rotating body 20 drives the second rotating body 30 to rotate; secondly, the second rotating body 30 drives the third rotating body 60 to rotate; finally, the third rotating body 60 is threadedly connected to the valve core assembly 50, and can move back and forth along the axis of the third rotating body 60, so that the valve core assembly 50 closes the inlet 121.

[0048] Among them, if the component of the torsional force in the first direction is greater than or equal to the preload force, the component force drives the second rotating body 30 to move in the first direction, and the first rotating body 20 does not move in the first direction due to the axial thrust rotation cooperation with the valve body 10, so that the second rotating body 30 moves relative to the first rotating body 20 and there is a gap between the two, then the first rotating body 20 idles, the second rotating body 30 is stationary, and the valve core assembly 50 cannot close the inlet 121.

[0049] The present application limits the magnitude of the torsional force applied to the first rotating body 20 by means of a press-fit elastic member 40 and the one-way fixed torque separation of the first rotating body 20 and the second rotating body 30. When the torsional force is less than a preset value, the valve core assembly 50 can block the fluid; when the torsional force is greater than or equal to the preset value, the valve core assembly 50 cannot block the fluid, thereby avoiding accidental scrapping of the angle valve. The operation is simple and convenient.

[0050] As a feasible method, a first meshing tooth 21 is provided on the end face of the first rotating body 20 facing the second rotating body 30, and a second meshing tooth 31 is provided on the end face of the second rotating body 30 facing the first rotating body 20. The first meshing tooth 21 and the second meshing tooth 31 are meshed in surface contact, and the contact surface is inclined relative to the axis of the first rotating body 20.

[0051] It should be noted that if Figure 1-Figure 3 As shown, the first rotating body 20 is provided with a first meshing tooth 21 on the end surface facing the second rotating body 30, and the cross section of the first meshing tooth 21 gradually decreases in the direction from the first rotating body 20 to the second rotating body 30, and the cross section is perpendicular to the first direction. The second rotating body 30 is provided with a second meshing tooth 31 on the end surface facing the first rotating body 20, and the cross section of the second meshing tooth 31 gradually decreases in the direction from the second rotating body 30 to the first rotating body 20, and the cross section is perpendicular to the first direction. For example, the second meshing tooth 31 is as shown in FIG. Figure 5 , Figure 6 or Figure 7 As shown, the first meshing tooth 21 meshes with the second meshing tooth 31 to form a force-limiting ratchet layer. The first meshing tooth 21 and the second meshing tooth 31 are in surface contact, the contact surface is inclined, and the contact surface intersects with the first direction. Surface contact is conducive to the first meshing tooth 21 stably applying force to the second meshing tooth 31, and the surface contact inclined setting can limit the magnitude of the torsional force.

[0052] Specifically, the first meshing teeth 21 are as follows Figure 2 As shown, the first meshing teeth 21 gradually decrease in the direction from the first rotating body 20 to the second rotating body 30. There are a plurality of first meshing teeth 21 arranged in a ring shape, and the length of the first meshing teeth 21 extends along the radial direction of the first rotating body 20. The second meshing teeth 31 are as shown in FIG. Figure 3 As shown, the second meshing teeth 31 gradually decrease in the direction from the second rotating body 30 to the first rotating body 20, there are a plurality of second meshing teeth 31 arranged in a ring shape, and the length of the second meshing teeth 31 extends along the radial direction of the second rotating body 30. The above arrangement is conducive to the continuous application of force between the first meshing teeth 21 and the second meshing teeth 31, stably driving the second meshing teeth 31 to rotate, or continuously driving the second rotating body 30 to move in the first direction, and the second rotating body 30 frequently jumps relative to the first rotating body 20.

[0053] As an achievable manner, the second rotating body 30 is provided with a second through hole 32, the third rotating body 60 passes through the second through hole 32, one of the second through hole 32 and the third rotating body 60 is provided with a slider 33, and the other is provided with a slide groove 62 that cooperates with the slider 33, and the slide groove 62 extends along the axis of the second rotating body 30 or the axis of the third rotating body 60. The second rotating body 30 and the third rotating body 60 are axially slidably locked by the slider 33 and the slide groove 62, and the structure is simple, compact, and easy to process.

[0054] Specifically, Figure 3 As shown, the second rotating body 30 is provided with a second through hole 32, and the axis of the second through hole 32 is located at the geometric center of the second rotating body 30. A plurality of sliders 33 are protruded from the inner wall of the second through hole 32 toward the axis thereof, and the plurality of sliders 33 are arranged in a ring shape. Figure 4 As shown, a plurality of slide grooves 62 are provided on the side wall of the third rotating body 60, which are recessed toward the axis thereof. The plurality of slide grooves 62 are arranged in a ring shape, and the slide grooves 62 extend along the axis direction of the third rotating body 60. The slide grooves 62 correspond to the sliders 33 one by one, and the sliders 33 are embedded in the slide grooves 62. When the component force of the torsional force in the first direction is less than the preload force, the second rotating body 30 drives the third rotating body 60 to rotate through the sliders 33; when the component force of the torsional force in the first direction is greater than or equal to the preload force, the second rotating body 30 moves along the first direction through the slide grooves 62. It should be noted that the sliders 33 may also be provided on the third rotating body 60, and the slide grooves 62 may also be provided on the second rotating body 30.

[0055] As a feasible manner, the first rotating body 20 is provided with a first through hole 22, and the third rotating body 60 passes through the second and first through holes in sequence. The distance between the second rotating body 30 and the third rotating body 60 is limited by a locking member so that the elastic member 40 is press-fitted.

[0056] like Fig. 9 As shown, in a specific embodiment, the locking member is a stop nut 70. The third rotating body 60 protrudes from the first through hole 22, and the portion of the third rotating body 60 protruding from the first through hole 22 is connected to the nut 80. The stop nut 70 is connected to the nut 80 to limit the length of the portion of the third rotating body 60 protruding from the first through hole 22, that is, to control the distance between the second rotating body 30 and the third rotating body 60, so as to adjust the preload force of the elastic member 40. The above setting direction can continuously adjust the preload force.

[0057] In another specific embodiment, the locking member is a pin. The third rotating body 60 does not protrude from the first through hole 22, and a plurality of adjustment holes are provided on the end of the third rotating body 60 facing the first rotating body 20. The plurality of adjustment holes (not shown) are arranged at intervals along the first direction, and the axis of the adjustment hole is perpendicular to the first direction. A matching hole (not shown) for matching with the adjustment is provided at a corresponding position on the first rotating body 20, and the pin passes through the matching hole and an adjustment hole, and the spacing between the second rotating body 30 and the third rotating body 60 is controlled through the adjustment holes at different positions, thereby adjusting the preload force of the elastic member 40. The above-mentioned setting direction can intermittently control the preload force.

[0058] The above setting method can adjust the size of the preload force on the one hand, and on the other hand, after the angle valve has been working for a period of time, a gap will appear in the valve core assembly 50's sealed inlet 121; the preload force can be adjusted again to ensure that the valve core assembly 50 has a good effect of sealing the inlet 121.

[0059] Furthermore, if Fig. 9 As shown, the side wall of the third rotating body 60 facing the end of the valve core assembly 50 extends outwardly along its radial direction and extends toward the second rotating body 30 to form a first embedding slot 63, and the elastic member 40 is embedded in the first embedding slot 63, so that the elastic member 40 is stably fixed on the third rotating body 60. Alternatively, the end surface of the second rotating body 30 facing away from the first rotating body 20 is recessed to form a second embedding slot 34, and the elastic member 40 is embedded in the second embedding slot 34, so that the elastic member 40 is stably fixed on the second rotating body 30. Alternatively, the above two methods are combined, and one end of the elastic member 40 is stably fixed to the first embedding slot 63, and the other end is stably fixed to the second embedding slot 34.

[0060] Furthermore, if Fig. 9 As shown, the elastic member 40 is a spring, which is sleeved on the third rotating body 60, one end of the spring is inserted into the first insertion slot 63, and the other end of the spring is inserted into the second insertion slot 34. The spring is sleeved with the third rotating body 60, which can limit the spring to be compressed or extended along the first direction. It should be noted that there can also be multiple springs, which are arranged around the third rotating body 60 at equal angles.

[0061] As a feasible method, the end of the third rotating body 60 is recessed toward the valve core assembly 50 to form a threaded hole 64. The valve core assembly 50 includes a valve core 51 and a screw rod 52. The screw rod 52 is arranged along the axis of the third rotating body 60. The threaded hole 64 is axially slidingly engaged with one end of the screw rod 52 to prevent rotation. The other end of the screw rod 52 is threadedly connected to the valve core 51.

[0062] In a specific embodiment, if Fig.10 As shown, the threaded hole 64 and one end of the screw rod 52 are axially slidably locked by a locking block 53, the locking block 53 is connected to the inner wall of the valve body 10, the side wall of the screw rod 52 is provided with a groove 521 extending along its axis, and the locking block 53 is embedded in the groove 521 to restrict the self-rotation of the screw rod 52. The screw rod 52 is connected to the threaded hole 64 so that the screw rod 52 can only reciprocate along the first direction.

[0063] In another specific embodiment, the threaded hole 64 is axially slidably locked with one end of the screw rod 52 by means of a ball (not shown), the screw rod 52 and the threaded hole 64 are connected, and the ball is disposed in a spiral raceway formed by the screw rod 52 and the threaded hole 64 .

[0064] Furthermore, the other end of the screw 52 is threadedly connected to the valve core 51, and the valve core 51 is detachable from the screw 52. If the valve core 51 does not seal the inlet 121 well, the valve core 51 can be actively replaced to improve the sealing effect, thereby reducing the material requirements of the valve core 51 to adapt to the working environment with a large temperature difference.

[0065] Furthermore, the vacuum bellows 70 is sleeved on the screw rod 52 .

[0066] Specifically, Figure 8 As shown, the valve core assembly 50 includes a first surface and a second surface that are oppositely disposed, and the second surface faces the inlet 121. A threaded boss 512 is provided on the first surface, and a blind hole 522 is provided at the end of the screw 52 facing the valve core 51, and the threaded boss 512 of the valve core 51 is connected to the blind hole 522; an inner hexagonal hole 511 is recessed on the second surface, and the valve core 51 is disassembled through the inner hexagonal hole 511.

[0067] In addition, if Fig.11 As shown, the valve core assembly 50 also includes a side surface 513 connecting the first surface and the second surface. The orthographic projection of the second surface on the first surface does not completely cover the first surface, and the side surface is a curved surface; correspondingly, the inlet 121 is a constricted shape, which gradually expands along the air intake or liquid intake direction. The valve core 51 seals the inlet 121, that is, the side surface 513 abuts against the inlet 121, which is conducive to increasing the contact area between the two and improving the sealing effect.

[0068] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An all-metal angle valve, characterized in that: include: A valve body and a first rotating body, a second rotating body, a third rotating body, a valve core assembly and an elastic member located in the valve body, wherein the first rotating body, the second rotating body and the third rotating body are coaxially installed in sequence, and the first rotating body and the valve body can be axially thrust-rotatably matched, so that the valve body is stationary, the first rotating body rotates relative to the valve body, and the first rotating body does not move along a first direction, and the first direction is the extension direction of the axes of the first, second and third rotating bodies; The first rotating body and the second rotating body are separated by a unidirectional fixed torque force, the second rotating body and the third rotating body are axially sliding and anti-rotationally matched, the elastic member is pressed between the second rotating body and the third rotating body, the valve core assembly is screwed to the third rotating body, and can reciprocate along the axis of the third rotating body; wherein the elastic member is a spring, and the spring is sleeved on the third rotating body; A first meshing tooth is provided on the end surface of the first rotating body facing the second rotating body; a second meshing tooth is provided on the end surface of the second rotating body facing the first rotating body, the first meshing tooth and the second meshing tooth are in surface contact, and the contact surface is inclined relative to the axis of the first rotating body; there are a plurality of first meshing teeth arranged in a ring shape, and the first meshing teeth extend in the radial direction of the first rotating body; there are a plurality of second meshing teeth arranged in a ring shape, and the second meshing teeth extend in the radial direction of the second rotating body, or, The second rotating body is provided with a second through hole, and the third rotating body passes through the second through hole. One of the second through hole and the third rotating body is provided with a slider, and the other is provided with a slide groove cooperating with the slider, and the slide groove extends along the axis direction of the second rotating body or the axis direction of the third rotating body.

2. The all-metal angle valve according to claim 1, characterized in that: A plurality of sliders arranged in an annular shape are convexly provided on the inner wall of the second through hole, and a plurality of slide grooves arranged in an annular shape are concavely provided on the side wall of the third rotating body, and the slide grooves extend along the axial direction of the third rotating body.

3. The all-metal angle valve according to claim 1, characterized in that: The first rotating body is provided with a first through hole, and the third rotating body passes through the second and first through holes in sequence. The distance between the second rotating body and the third rotating body is limited by a locking member so that the elastic member can be press-fitted.

4. The all-metal angle valve according to claim 3, characterized in that: The locking member is a stop nut, the third rotating body protrudes out of the first through hole, and a portion of the third rotating body protruding out of the first through hole is threadedly connected to the stop nut.

5. The all-metal angle valve according to claim 1, characterized in that: The side wall of the third rotating body toward the end of the valve core assembly extends radially outward and toward the second rotating body to form a first embedding slot, and the elastic member is embedded in the first embedding slot, or / and, the end surface of the second rotating body facing away from the first rotating body is recessed to form a second embedding slot, and the elastic member is embedded in the second embedding slot.

6. The all-metal angle valve according to claim 5, characterized in that: The valve core assembly includes a first surface and a second surface arranged opposite to each other and a side surface connecting the first surface and the second surface, the side surface is used to seal the inlet or outlet of the valve body, the second surface is close to the inlet or outlet of the valve body, the orthographic projection of the second surface on the first surface does not completely cover the first surface, and the side surface is a tapered curved surface.

7. The all-metal angle valve according to claim 1, characterized in that: The end of the third rotating body toward the valve core assembly is recessed to form a threaded hole. The valve core assembly includes a valve core and a screw. The screw is arranged along the axis of the third rotating body. The threaded hole is axially slidingly engaged with one end of the screw to enable the screw to reciprocate along the axis of the third rotating body. The other end of the screw is threadedly connected to the valve core.

8. The all-metal angle valve according to claim 7, characterized in that: The threaded hole and one end of the screw are axially slidingly anti-rotationally matched by a stop block, the stop block is connected to the inner wall of the valve body, the side wall of the screw is provided with a groove extending along its axis, the stop block is inserted in the groove, and the screw and the threaded hole are connected; or, the threaded hole and one end of the screw are axially slidingly anti-rotationally matched by a ball, the screw and the threaded hole are connected, and the ball is arranged in a spiral raceway formed by the screw and the threaded hole.

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