Two-stage switchable speed ratio valve driving device

Abstract

The utility model relates to the related technical field of valve driving, in particular to a two-stage speed ratio switchable valve driving device which comprises a box body outer cover and a speed change mechanism, and the speed change mechanism is arranged on one side of the surface of the box body outer cover. According to the two-stage valve driving device capable of switching the speed ratio, through the arrangement of the speed change mechanism, when a special planet shaft is pushed inwards to be fixed, a second rack in the center of a second planet carrier is overhead, a sun gear on the special planet shaft is embedded with three sets of planet gears, and then the planet gears drive an outer ring box body to rotate on a fixed first rack; at the moment, the special planet shaft rotates for four circles, the first planet carrier and the second planet carrier rotate for one circle, meanwhile, the special planet shaft is lifted outwards and fixed, and a sun gear on the special planet shaft does not make contact with a planet gear and is further embedded into a second rack on the second planet carrier; the ratio of the rotating speed of the special planet shaft to the rotating speed of the first planet carrier to the rotating speed of the second planet carrier is one to one, and a small-torque high-rotating-speed adjusting mode is adopted, namely adjustment is completed.

Description

Technical Field

[0001] The utility model relates to the technical field related to valve driving devices, in particular to a two-stage switchable speed ratio valve driving device. Background Art

[0002] A valve drive is a device installed on a valve to manipulate the opening and closing of the valve. It can convert the input power into the mechanical movement of the valve to achieve the switching or adjustment control of the valve. The valve drive can be manual, electric, pneumatic or hydraulic, which greatly reduces the operation time and difficulty of manual valves. With the development of science and technology, the requirements for valve drives are getting higher and higher. Therefore, a two-stage switchable speed ratio valve drive is particularly needed.

[0003] However, the existing two-stage switchable speed ratio valve drive device, most of the current manual valves use a fixed speed ratio valve drive device. When the valve is switched, no matter the pressure is large or no-load or not, it can only be operated with the same speed ratio, which makes load operation difficult and no-load adjustment time-consuming. Utility Model Content

[0004] The purpose of the utility model is to provide a two-stage switchable speed ratio valve drive device to solve the problem of the existing two-stage switchable speed ratio valve drive device proposed in the above background technology. At present, most manual valves use a valve drive device with a fixed speed ratio. When the valve is switched, it can only be operated with the same speed ratio regardless of the pressure or whether it is no-load or not, resulting in the problem that load operation is laborious and no-load adjustment is time-consuming.

[0005] To achieve the above object, the utility model provides the following technical solution: a two-stage switchable speed ratio valve driving device, comprising a box outer cover and a speed change mechanism, wherein the speed change mechanism is arranged on one side of the surface of the box outer cover;

[0006] The speed change mechanism includes an outer ring case, a first mounting groove, a second mounting groove, a first planetary carrier, a first rack, a planetary gear, a second planetary carrier, a through groove, a special planetary shaft, a second rack and a sun gear. One side of the surface of the case outer cover is fixedly connected to the outer ring case, one side of the surface of the outer ring case is provided with a first mounting groove, and the other side of the outer ring case is provided with a second mounting groove. The first planetary carrier is embedded in the first mounting groove, and the first rack is installed on the inner wall of the second mounting groove. One side of the surface of the first planetary carrier is provided with a planetary gear, and the second planetary carrier is fitted on the other side of the planetary gear. One side of the surface of the second planetary carrier is provided with a through groove, and a special planetary shaft is embedded in the through groove. The second rack is installed on the inner wall of the through groove, and the sun gear is installed on the surface of the special planetary shaft.

[0007] Preferably, three sets of the planetary gears are provided, and one side of the planetary gears is meshed with the first rack.

[0008] Preferably, the sun gear is meshed with the second rack, and the other side of the planetary gear is meshed with the sun gear.

[0009] Preferably, one side of the special planetary shaft passes through the outer cover of the box body, and the other side of the special planetary shaft is arranged inside the first planetary carrier.

[0010] Preferably, the second planet carrier is embedded in the interior of the outer cover of the casing, the first planet carrier and the second planet carrier are connected via planetary gears, and the planetary gears form a mutually rotating structure with the first rack via a sun gear.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the two-stage switchable speed ratio valve drive device, through the setting of the speed change mechanism, the speed change mechanism is easy to process and install, and the current speed ratio of the device can be freely adjusted to achieve the purpose of facilitating the rapid and accurate lifting and lowering of the valve stem, greatly reducing the operation time and difficulty of the manual valve, and at the same time realizing rapid adjustment of a large speed ratio when no-load and labor-saving adjustment of a small speed ratio when loaded, so as to achieve the best of both worlds. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the cross-sectional structure of the side appearance of the utility model;

[0013] Figure 2 It is a schematic diagram of the partial cross-sectional exploded structure of the speed change mechanism of the utility model;

[0014] Figure 3 This is a schematic diagram of the fully exploded structure of the speed change mechanism of the utility model;

[0015] Figure 4 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0016] In the figure: 1. outer cover of the housing; 2. speed change mechanism; 201. outer ring housing; 202. first mounting groove; 203. second mounting groove; 204. first planet carrier; 205. first rack; 206. planetary gear; 207. second planet carrier; 208. through groove; 209. special planetary shaft; 210. second rack; 211. sun gear. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4 The utility model provides a technical solution: a two-stage switchable speed ratio valve driving device, comprising a box body cover 1 and a speed change mechanism 2, wherein the speed change mechanism 2 is arranged on one side of the surface of the box body cover 1;

[0019] The speed change mechanism 2 includes an outer ring case 201, a first mounting groove 202, a second mounting groove 203, a first planet carrier 204, a first rack 205, a planetary gear 206, a second planet carrier 207, a through groove 208, a special planetary shaft 209, a second rack 210 and a sun gear 211. The outer ring case 201 is fixedly connected to one side of the surface of the case outer cover 1. The first mounting groove 202 is provided on one side of the surface of the outer ring case 201, and the second mounting groove 203 is provided on the other side of the outer ring case 201. The first planet carrier 204 is embedded in the first mounting groove 202, and the first rack 205 is installed on the inner wall of the second mounting groove 203. A planetary gear 206 is installed on one side of the surface of the first planetary carrier 204, and a second planetary carrier 207 is installed on the other side of the planetary gear 206. A through groove 208 is opened on one side of the surface of the second planetary carrier 207, and a special planetary shaft 209 is embedded in the through groove 208. A second rack 210 is installed on the inner wall of the through groove 208, and a sun gear 211 is installed on the surface of the special planetary shaft 209. Through the outer ring housing 201, the first mounting groove 202, the second mounting groove 203, the first planetary carrier 204, the first rack 205, the planetary gear 206, the second planetary carrier 207, the through groove 208, the special planetary shaft 209, The arrangement of the second rack 210 and the sun gear 211, when in use, when the special planetary shaft 209 is pushed inward and fixed, the second rack 210 at the center of the second planetary frame 207 is suspended, and the sun gear 211 on the special planetary shaft 209 is engaged with the three sets of planetary gears 206, and then the planetary gear 206 drives the outer ring box 201 to rotate on the fixed first rack 205. At this time, the special planetary shaft 209 rotates four circles, and the first planetary frame 204 and the second planetary frame 207 rotate one circle, and the speed ratio is 5.7 to 1. When the speed ratio of the valve drive device itself is 6 to 1, the speed ratio of the entire device is about 34 to 1, which is a load large torque and high pressure regulation mode. At this time, the handwheel drives the special planetary shaft 209 to rotate thirty-four times, and the output end of the drive device rotates one circle. When the speed needs to be changed, the special planetary shaft 209 is lifted outward and fixed. The sun gear 211 on the special planetary shaft 209 does not contact the planetary gear 206, and then engages with the second rack 210 on the second planetary carrier 207. At this time, the speed ratio of the special planetary shaft 209 to the first planetary carrier 204 and the second planetary carrier 207 is one to one. At this time, the speed ratio of the entire valve drive device is six to one, which is a small torque and high speed adjustment mode. At this time, the special planetary shaft 209 rotates six times, and the output end of the drive device rotates one circle, and the adjustment is completed.

[0020] Furthermore, three groups of planetary gears 206 are provided, and one side of the planetary gear 206 is meshed with the first rack 205. Through the setting of the first rack 205 and the planetary gear 206, the first rack 205 is tightly meshed with the planetary gear 206. Through the interaction between the rack and the gear, the force transmission and motion conversion are realized. At the same time, the design of the rack ensures that the gear can move smoothly along the rack. The planetary gear 206 is connected to the first planetary carrier 204 and the second planetary carrier 207 through a special planetary shaft 209 so that the two planetary carriers can achieve a linkage effect, ensuring the coordinated operation of the entire speed change mechanism 2. At the same time, the planetary gear 206 plays a key speed change role in the speed change mechanism 2. By meshing with the sun gear 211 and the first rack 205, the transmission ratio is adjusted to achieve output of different speeds and torques.

[0021] Furthermore, the sun gear 211 is meshed with the second rack 210, and the other side of the planetary gear 206 is meshed with the sun gear 211. Through the setting of the sun gear 211, the sun gear 211 acts as the core rotating drive element in the system through its meshing relationship with the planetary gear 206 and the second rack 210. As the central gear in the system, the sun gear 211 will coordinate the movement of the planetary gear 206 and the second rack 210, so that the entire device can quickly achieve speed changes.

[0022] Furthermore, one side of the special planetary shaft 209 passes through the outer cover 1 of the box body, and the other side of the special planetary shaft 209 is arranged inside the first planetary carrier 204. Through the setting of the special planetary shaft 209, the special planetary shaft 209 is pushed or pulled up, so that the sun gear 211 thereon is respectively engaged with the planetary gear 206 or the second rack 210, thereby realizing the speed adjustment of the device. At the same time, the design of the shaft ensures the stability and accuracy of the planetary gear 206 during rotation.

[0023] Furthermore, the second planetary carrier 207 is embedded in the interior of the outer cover 1 of the casing, the first planetary carrier 204 and the second planetary carrier 207 are connected through the planetary gear 206, and the planetary gear 206 forms a mutually rotating structure with the first rack 205 through the sun gear 211. Through the arrangement of the first planetary carrier 204 and the second planetary carrier 207, the first planetary carrier 204 plays a role in supporting and fixing the planetary gear 206, which ensures that the planetary gear 206 rotates at the specified position without deviation. The second planetary carrier 207 plays a role in supporting and fixing the planetary gear 206 by being embedded in the interior of the outer cover 1 of the casing, and it and the first planetary carrier 204 jointly support the planetary gear 206 to ensure that it rotates at the correct position.

[0024] Working principle: When the special planetary shaft 209 is pushed inward and fixed, the second rack 210 in the center of the second planetary frame 207 is vacated, and the sun gear 211 on the special planetary shaft 209 is engaged with the three sets of planetary gears 206, and then the planetary gears 206 drive the outer ring box 201 to rotate on the fixed first rack 205. At this time, the special planetary shaft 209 rotates four times, and the first planetary frame 204 and the second planetary frame 207 rotate one time, and the speed ratio is 5.7 to 1. When the speed ratio of the valve drive device itself is 6 to 1, the speed ratio of the entire device is about 34 to 1, which is a load high torque and high pressure adjustment mode. At this time, the handwheel drives the special travel The star shaft 209 rotates thirty-four times, and the output end of the drive device rotates one circle. When the speed needs to be changed, the special planetary shaft 209 is lifted and fixed outward. The sun gear 211 on the special planetary shaft 209 does not contact the planetary gear 206, and then engages with the second rack 210 on the second planetary carrier 207. At this time, the speed ratio of the special planetary shaft 209 to the first planetary carrier 204 and the second planetary carrier 207 is one to one. At this time, the speed ratio of the entire valve drive device is six to one, which is a small torque and high speed adjustment mode. At this time, the special planetary shaft 209 rotates six times, and the output end of the drive device rotates one circle, and the above is to complete the adjustment.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-stage switchable speed ratio valve driving device, comprising a housing cover (1) and a speed change mechanism (2), characterized in that: A speed change mechanism (2) is provided on one side of the surface of the outer cover (1) of the casing; The speed change mechanism (2) comprises an outer ring case (201), a first mounting groove (202), a second mounting groove (203), a first planetary carrier (204), a first rack (205), a planetary gear (206), a second planetary carrier (207), a through groove (208), a special planetary shaft (209), a second rack (210) and a sun gear (211); one side of the surface of the case outer cover (1) is fixedly connected to the outer ring case (201); one side of the surface of the outer ring case (201) is provided with a first mounting groove (202); the other side of the outer ring case (201) is provided with a second mounting groove (203); the first mounting groove A first planetary carrier (204) is embedded in the interior of (202), a first rack (205) is installed on the inner wall of the second mounting groove (203), a planetary gear (206) is installed on one side of the surface of the first planetary carrier (204), a second planetary carrier (207) is installed on the other side of the planetary gear (206), a through groove (208) is opened on one side of the surface of the second planetary carrier (207), a special planetary shaft (209) is embedded in the through groove (208), a second rack (210) is installed on the inner wall of the through groove (208), and a sun gear (211) is installed on the surface of the special planetary shaft (209).

2. The two-stage switchable speed ratio valve driving device according to claim 1, characterized in that: The planetary gears (206) are provided in three groups, and one side of the planetary gears (206) is meshed with the first rack (205).

3. The two-stage switchable speed ratio valve driving device according to claim 1, characterized in that: The sun gear (211) is meshed with the second rack (210), and the other side of the planetary gear (206) is meshed with the sun gear (211).

4. The two-stage switchable speed ratio valve driving device according to claim 1, characterized in that: One side of the special planetary shaft (209) passes through the outer cover (1) of the casing, and the other side of the special planetary shaft (209) is arranged inside the first planetary carrier (204).

5. The two-stage switchable speed ratio valve driving device according to claim 1, characterized in that: The second planet carrier (207) is embedded in the interior of the casing outer cover (1); the first planet carrier (204) and the second planet carrier (207) are connected via a planetary gear (206); and the planetary gear (206) forms a mutually rotating structure with the first rack (205) via a sun gear (211).

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