CN216200995U

CN216200995U - Motor valve for gas meter

Info

Publication number: CN216200995U
Application number: CN202121961385.XU
Authority: CN
Inventors: 吴建平; 徐存毅; 陈征
Original assignee: Cixi Sanyang Electrics Co ltd
Current assignee: Cixi Sanyang Electrics Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-04-05
Anticipated expiration: 2031-08-19

Abstract

The utility model discloses a motor valve for a gas meter, which comprises a ratchet transmission mechanism, wherein the ratchet transmission mechanism comprises a gear shaft, an output gear, a first ratchet box, double pawls, a second ratchet box and a transition gear, wherein the output gear, the first ratchet box, the double pawls, the second ratchet box and the transition gear are sequentially sleeved on the gear shaft; the double-pawl comprises a first pawl corresponding to the first ratchet box and a second pawl corresponding to the second ratchet box, a preset gap is reserved between the first pawl and the second pawl, the second ratchet box is provided with a central shaft, and the transition gear is rotatably arranged on the central shaft; transition gear and output gear tooth cooperation, output gear and first ratchet case circumference are spacing, and output gear can drive first ratchet case and transition gear simultaneously and rotate. The motor valve for the gas meter can play a role in preventing the motor from blocking rotation, so that the motor has no blocking rotation current, and further has the functions of reducing the working energy consumption of the motor valve for the gas meter and improving the working stability of the motor valve for the gas meter.

Description

Motor valve for gas meter

Technical Field

The utility model belongs to the technical field related to gas flow control, and particularly relates to a motor valve for a gas meter.

Background

The motor valve for the gas meter is applied to the gas meter to control the opening and closing of the gas meter. Specifically, when the motor valve works, the motor drives the speed reducing mechanism to operate, and then drives the valve seal for linearly sealing the air outlet, so that the motor valve is closed.

When the motor valve for the gas meter works, when the valve seal is completely opened or closed, namely when the valve seal moves to a limit position, time difference exists due to signal transmission, so that the motor does not stop power off and continues to work at the moment, the reduction gear in the reduction gear is driven to rotate, however, the valve seal moves to the limit position and is limited, the rack gear corresponding to the movement of the driving valve seal cannot continue to rotate, and the motor is blocked until the motor stops working. When the motor is locked, the corresponding working current is larger, so that the working energy consumption of the motor valve for the gas meter is increased; on the other hand, the locked-rotor of the motor can enable the mutual acting force of meshing between gears used for transmitting power in the motor valve for the gas meter to be large, and therefore the working stability of the whole motor valve for the gas meter can be reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a motor valve for a gas meter, which can prevent the occurrence of a situation of motor stalling when the motor valve for the gas meter is operated, in order to solve the technical problems in the prior art.

The gas meter motor valve comprises a ratchet transmission mechanism, wherein the ratchet transmission mechanism comprises a gear shaft, an output gear, a first ratchet box, double pawls, a second ratchet box and a transition gear, wherein the output gear, the first ratchet box, the double pawls, the second ratchet box and the transition gear are sequentially sleeved on the gear shaft;

the double pawls comprise a first pawl and a second pawl, and a preset gap is reserved between the first pawl and the second pawl, wherein the first pawl corresponds to the first ratchet box, and the second pawl corresponds to the second ratchet box; a central shaft is arranged on the second ratchet box, and the transition gear is rotatably arranged on the central shaft; the transition gear with output gear rodent cooperation, output gear with first ratchet case circumference is spacing, just output gear can drive simultaneously first ratchet case reaches the transition gear rotates.

In this application, through the structural arrangement of above-mentioned ratchet drive mechanism, this motor valve for gas table can utilize the cooperation between first pawl and the first ratchet case on the two pawls, and the cooperation between second pawl and the second ratchet case on the two pawls, make this motor valve for gas table's valve seal by the complete back of opening or closing completely, the second ratchet case can also drive two pawls, or the second ratchet case is done for the rotation of two pawls, so that reach the effect of preventing this motor valve for gas table's motor stalling, make the motor not have the stall current, and then have and reduce this motor valve for gas table complete machine work energy consumption, the effect of the stability of this motor valve for gas table complete machine during operation is improved.

In one embodiment, the double pawls further include a connection cylinder, and the first pawls and the second pawls are distributed at intervals on both sides of the connection cylinder.

It can be understood that through the structural arrangement, the specific structural arrangement of the double pawls is realized, and the effect of simplifying the structure is achieved on the basis of meeting the matching between the double pawls and the first ratchet box and the second ratchet box.

In one embodiment, the connecting cylinder, the first pawl and the second pawl are connected into a whole.

It can be understood that the structural arrangement described above, so as to facilitate the production preparation of the double pawl, has the effect of reducing the production cost of the double pawl.

In one embodiment, the output gear is provided with a limiting part on one end face facing the first ratchet case, the first ratchet case is provided with a limiting matching part matched with the limiting part, and the first ratchet case and the output gear are circumferentially limited through matching between the limiting matching part and the limiting part.

It can be understood that through the above structural arrangement, the assembly connection between the first ratchet box and the output gear is specifically realized, so that the circumferential limiting effect between the first ratchet box and the output gear is achieved, the first ratchet box always rotates along with the output gear, and the effect of facilitating the assembly of the first ratchet box to the output gear is achieved.

In one embodiment, the limiting part is a convex key fixedly connected to the output gear; and the limiting matching part is provided with a key groove formed in the first ratchet box, and the key groove is matched with the convex key.

It can be understood that the limiting part is arranged to be a convex key, and the limiting matching part is arranged to be matched with a key groove of the convex key, so that circumferential limitation between the first ratchet box and the output gear is realized, the structure is simplified, and the first ratchet box and the output gear can be assembled conveniently.

In one embodiment, the second ratchet box is further provided with limiting convex columns, and the limiting convex columns and the central shaft are distributed on the second ratchet box at intervals.

The structure of the limiting convex column can realize the rotation stopping limiting of the second ratchet box by the limiting convex column when the motor valve for the gas meter works, so that after the motor valve for the gas meter is completely closed, the double pawls are limited by the second ratchet box, and the first ratchet box rotates relative to the double pawls, thereby specifically realizing the effect of the motor valve for the gas meter on the rotation stopping of the motor after the motor valve for the gas meter is completely closed; meanwhile, the motor valve for the gas meter utilizes the limiting convex column on the second ratchet box to stop rotation and limit the second ratchet box, so that the structure is simplified, and the effect of stopping rotation and limiting the second ratchet box is facilitated.

In one embodiment, the direction of the limiting convex column and the central shaft on the second ratchet box is the same.

It can be understood that, through the above structure arrangement, a structure for matching the limiting convex column is arranged on the motor valve for the gas meter, so that the structure is simplified.

In one embodiment, the motor valve for the gas meter further comprises a motor, a gear box, a rack gear and a rack, the rack gear is engaged with the rack, the gear shaft and the output gear are mounted on the gear box, and the transition gear can be selectively meshed with the rack gear, so that the motor can drive the rack gear to rotate through the gear box and the ratchet transmission mechanism.

It can be understood that through the above structure, the assembly connection of the ratchet transmission mechanism in the motor valve for the gas meter is specifically realized, so that when the motor valve for the gas meter works, the rotation of the rack and the gear can be selectively driven, and the use requirement of opening the valve when the motor valve for the gas meter works is met.

In one embodiment, the motor valve further includes a housing, and the ratchet transmission mechanism and the rack gear are mounted in the housing, wherein a fixed shaft is disposed on the housing, and the rack gear is rotatably mounted on the fixed shaft.

It can be understood that, through the above structural arrangement, the rack gear is specifically assembled and connected in the motor valve for the gas meter, so that the rack gear is conveniently assembled and connected.

In one embodiment, the case body is further provided with a limit stop, the limit stop corresponds to the limit convex column, and the limit stop can limit the second ratchet case to continuously swing relative to the case body through the limit convex column.

It can be understood that, through the above structure arrangement, the motor valve for the gas meter is particularly abutted between the limit stop fixedly connected to the case body and the limit convex column on the second ratchet case, so that the rotation stopping limit of the second ratchet case is realized, and the rotation stopping limit of the motor valve for the gas meter to the second ratchet case is convenient after the valve is completely closed.

Drawings

Fig. 1 is a schematic structural diagram of a motor valve for a gas meter according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of another view angle of the motor valve for a gas meter according to an embodiment of the present application.

Fig. 3 is a partial structural diagram in the present application.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is a schematic view of the structure of the double pawl in the present application.

FIG. 6 is a schematic view of a second ratchet box of the present application.

10, a shell box body; 11. a fixed shaft; 12. a limit stop block; 20. a valve body; 30. a motor; 40. a gear case; 50. a ratchet drive mechanism; 51. a gear shaft; 52. an output gear; 521. a limiting part; 53. a first ratchet case; 531. a limit matching part; 54. a double pawl; 541. a first pawl; 542. a second pawl; 543. connecting the cylinder body; 55. a second ratchet case; 551. a central shaft; 552. a limiting convex column; 56. a transition gear; 60. a rack and pinion; 70. a rack; 80. a valve seal assembly; 81. a spring; 82. valve sealing; 83. a bellows.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 to 6, a motor valve for a gas meter according to an embodiment of the present invention includes a housing 10, a valve body 20, a motor 30, a gear box 40, a ratchet transmission mechanism 50, a rack gear 60, a rack 70, and a valve seal assembly 80.

It can be understood that, the motor 30, the gear box 40, the ratchet transmission mechanism 50, and the rack and pinion 60 of the present embodiment are installed in the housing case 10, the rack 70 penetrates through the housing case 10 and extends into the valve body 20, wherein the portion of the rack 70, which is arranged in the housing case 10, is engaged with the rack and pinion 60, and the valve seal assembly 80 is installed on the rack 70, which is arranged in the valve body 20, so that when the motor valve for a gas meter is operated, the motor 30 can rotate the rack and pinion 60 through the gear box 40 and the ratchet transmission mechanism 50, and the valve seal assembly 80 is driven to move toward the housing case 10 by the engagement between the rack and pinion 60 and the rack 70, and the valve opening function is achieved; when the motor 30 drives the ratchet mechanism 50 to disengage from the rack gear 60 through the gear box 40, the valve sealing assembly 80 is elastically restored under the driving of the internal spring 81 thereof, and the valve closing effect is achieved. It should be noted that the valve seal assembly 80 further includes a valve seal 82 and a bellows 83, one end of the bellows 83 is mounted on the rack 70, the other end is mounted on the valve body 20, the spring 81 is disposed in the bellows 83 and abuts against the bellows 83 and the valve body 20, respectively, and a portion of the rack 70 extending out of the bellows 83 is fixedly connected to the valve seal 82, which will not be described herein.

The housing case 10 of the present embodiment is provided with a fixed shaft 11, and the rack gear 60 is rotatably mounted on the fixed shaft 11. Therefore, the rack gear 60 is assembled and connected in the motor valve for the gas meter, so that the rack gear 60 is assembled and connected conveniently.

In the present embodiment, the ratchet transmission mechanism 50 of the present embodiment includes a gear shaft 51, an output gear 52 sleeved on the gear shaft 51 in sequence, a first ratchet box 53, a double pawl 54, a second ratchet box 55, and a transition gear 56.

The gear shaft 51 and the output gear 52 are mounted on the gear case 40, and the transition gear 56 is selectively engaged with the rack gear 60, so that the motor 30 can drive the rack gear 60 to rotate through the gear case 40 and the ratchet gear 50. Therefore, the ratchet transmission mechanism 50 is assembled and connected in the motor valve for the gas meter, so that when the motor valve for the gas meter works, the rack gear 60 can be selectively driven to rotate, and the use requirement of opening the valve when the motor valve for the gas meter works is met. It should be noted that the input end of the gear box 40 is connected to the rotating shaft of the motor 30, and the output end is specifically set as the output gear 52 on the ratchet transmission mechanism 50.

The double pawl 54 of the present embodiment includes a first pawl 541 and a second pawl 542, and a predetermined gap is left between the first pawl 541 and the second pawl 542, wherein the first pawl 541 corresponds to the first ratchet box 53, and the second pawl 542 corresponds to the second ratchet box 55. The first ratchet box 53 and the second ratchet box 55 are matched with the double pawls 54 independently, and then the double pawls 54 are arranged between the first ratchet box 53 and the second ratchet box 55, so that the matching mode between the first ratchet box 53 and the first pawls 541 of the double pawls 54 is opposite to the matching mode between the second ratchet box 55 and the second pawls 542 of the double pawls 54, and the use requirement of the motor valve for the gas meter is met.

As can be seen from the above, when the motor valve for a gas meter in the present embodiment is opened, the motor 30 drives the output gear 52 to rotate through the gear box 40, the rotating output gear 52 can simultaneously drive the first ratchet box 53 and the transition gear 56 to rotate, the first ratchet box 53 can drive the double pawls 54 to rotate relative to the gear shaft 51 by the cooperation between the first pawls 541 of the double pawls 54, and in this process, the second pawls 542 of the double pawls 54 can rotate relative to the second ratchet box 55; under the action of friction force, the output gear 52 can drive the transition gear 56 to swing towards the direction of the rack gear 60 until the transition gear 56 is meshed with the rack gear 60, then the output gear 52 continuously drives the transition gear 56 to realize the rotary driving of the rack gear 60, and the meshing fit between the rack gear 60 and the rack 70 is utilized to achieve the function of valve opening, when the valve seal assembly 80 is completely opened, namely the valve opening distance is opened to the maximum, the rack 70 is limited and cannot move continuously, so that the rack gear 60 is prevented from rotating continuously, and the rack gear 60 is prevented from rotating continuously; meanwhile, the motor 30 continues to work and drives the output gear 52 to rotate, the output gear 52 can continue to drive the first ratchet box 53 and the double pawl 54 to continue rotating, while the second ratchet box 55 is in a static state, on the other hand, the output gear 52 continues to drive the transition gear 56 to rotate, so that the transition gear 56 can continuously and repeatedly push against the last tooth on the rack 70, and then the elastic driving of the spring 81 on the rack 70 is used for realizing the resetting of the rack 70. That is to say, the motor valve for the gas meter can avoid that when the valve is opened to the maximum, the motor 30 cannot cause the motor 30 to be locked to stop working because the transmission gear cannot rotate, so that the motor 30 has no locked current, and further has the effects of reducing the working energy consumption of the complete motor valve for the gas meter and improving the working stability of the complete motor valve for the gas meter.

The double-pawl 54 of the present embodiment further includes a connecting cylinder 543, and the first pawl 541 and the second pawl 542 are distributed at intervals on two sides of the connecting cylinder 543, so as to implement the specific structural configuration of the double-pawl 54, and have the function of simplifying the structure on the basis of satisfying the matching between the double-pawl 54 and the first ratchet case 53 and the second ratchet case 55.

Further, the connecting cylinder 543, the first pawl 541 and the second pawl 542 of the present embodiment are connected as a whole, so as to facilitate the production and preparation of the dual pawl 54, and have the effect of reducing the production cost of the dual pawl 54. It should be noted that the dual-pawl 54 of the present embodiment is made of plastic, and may be integrally injection molded.

Next, the second ratchet case 55 of the present embodiment is provided with a central shaft 551, the transition gear 56 is rotatably mounted on the central shaft 551, the transition gear 56 is engaged with the output gear 52, the output gear 52 is circumferentially limited with the first ratchet case 53, and the output gear 52 can simultaneously drive the first ratchet case 53 and the transition gear 56 to rotate.

In the present embodiment, the output gear 52 of the present embodiment is provided with the limiting portion 521 on one end surface facing the first ratchet case 53, the first ratchet case 53 is provided with the limiting engaging portion 531 matching with the limiting portion 521, and the first ratchet case 53 and the output gear 52 are circumferentially limited by the engagement between the limiting engaging portion 531 and the limiting portion 521. The first ratchet case 53 and the output gear 52 are assembled and connected, so that the circumferential limiting effect between the first ratchet case 53 and the output gear 52 is achieved, the first ratchet case 53 always rotates along with the output gear 52, and the first ratchet case 53 can be assembled on the output gear 52 conveniently.

Specifically, the limiting portion 521 of the present embodiment is configured as a convex key fixedly connected to the output gear 52; and, the limit matching part 531 is provided with a key slot formed on the first ratchet box 53, and the key slot is matched with the convex key. Therefore, the circumferential limit between the first ratchet case 53 and the output gear 52 is realized, the structure is simplified, and the assembly between the first ratchet case 53 and the output gear 52 is facilitated.

In addition, the second ratchet case 55 of the present embodiment is further provided with a limiting protruding pillar 552, and the limiting protruding pillar 552 and the central shaft 551 are distributed on the second ratchet case 55 at intervals. When the motor valve for the gas meter works, the rotation stopping limit of the second ratchet box 55 can be realized by using the limiting convex column 552, so that after the motor valve for the gas meter is completely closed, the second pawl 542 of the double pawls 54 is limited by the second ratchet box 55, and the first pawl 541 of the double pawls 54 can rotate relative to the first ratchet box 53, so that in the process, the motor 30 can continuously work and simultaneously realize the rotation driving of the first ratchet box 53 and the transition gear 56, namely the rotation blocking prevention effect of the motor valve for the gas meter on the motor 30 after the motor valve is completely closed is specifically realized; meanwhile, the motor valve for the gas meter utilizes the limiting convex column 552 on the second ratchet box 55 to limit the rotation of the second ratchet box 55, so that the structure is simplified, and the effect of limiting the rotation of the second ratchet box 55 is facilitated.

Further, the direction of the limiting convex pillar 552 and the central axis 551 on the second ratchet case 55 is the same. So that set up the structure that is used for spacing projection 552 cooperation on this motor valve for gas table to this has the effect of simplifying the structure. Of course, the orientation between the limiting convex pillar 552 and the central axis 551 is not limited to that shown in the drawings, and it is obvious to those skilled in the art that the included angle formed between the limiting convex pillar 552 and the central axis 551 may be set to any other angle, for example, the included angle may be set to any other angle, such as 180 ° or 90 °.

In this embodiment, the case body 10 of this embodiment is further installed with a limit stop 12, the limit stop 12 corresponds to the limit boss 552, and the limit stop 12 can limit the second ratchet box 55 by the limit boss 552 to continue swinging relative to the case body 10. The motor valve for the gas meter is particularly fixed on the housing box body 10 and abutted between the limit stop 12 and the upper limit convex column 552 of the second ratchet box 55, so that the rotation stopping limit of the second ratchet box 55 is realized, and the rotation stopping limit of the motor valve for the gas meter on the second ratchet box 55 is facilitated after the valve is completely closed.

In summary, when the gas meter motor valve of the present invention is operated, the motor 30 can continuously drive the first ratchet case 53, the double pawls 54 and the transition gear 56 to rotate by the reasonable structural arrangement of the first ratchet case 53, the double pawls 54 and the second ratchet case 55 when the gas meter motor valve is completely opened; after the valve is completely closed, the motor 30 can continuously drive the first ratchet box 53 and the transition gear 56 to rotate, so that the effect of preventing the motor 30 from rotating in a blocking mode when the motor valve for the gas meter works is achieved, the motor does not have blocking current, the working energy consumption of the whole motor valve for the gas meter is reduced, and the working stability of the whole motor valve for the gas meter is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A motor valve for a gas meter comprises a ratchet transmission mechanism (50), and is characterized in that the ratchet transmission mechanism (50) comprises a gear shaft (51), an output gear (52) sleeved on the gear shaft (51) in sequence, a first ratchet box (53), double pawls (54), a second ratchet box (55) and a transition gear (56);

the double pawls (54) comprise a first pawl (541) and a second pawl (542), a preset gap is reserved between the first pawl (541) and the second pawl (542), wherein the first pawl (541) corresponds to the first ratchet box (53), and the second pawl (542) corresponds to the second ratchet box (55); a central shaft (551) is arranged on the second ratchet box (55), and the transition gear (56) is rotatably arranged on the central shaft (551); the transition gear (56) is engaged with the output gear (52), the output gear (52) is circumferentially limited with the first ratchet case (53), and the output gear (52) can simultaneously drive the first ratchet case (53) and the transition gear (56) to rotate.

2. The motor valve for the gas meter according to claim 1, wherein the double pawl (54) further comprises a connecting cylinder (543), and the first pawl (541) and the second pawl (542) are distributed at intervals on both sides of the connecting cylinder (543).

3. The motor valve for a gas meter according to claim 2, wherein the connecting cylinder (543), the first pawl (541), and the second pawl (542) are integrally connected.

4. The motor valve for the gas meter according to claim 1, wherein a limit portion (521) is provided on an end surface of the output gear (52) facing the first ratchet case (53), a limit engagement portion (531) matched with the limit portion (521) is provided on the first ratchet case (53), and circumferential limit is performed between the first ratchet case (53) and the output gear (52) by engagement between the limit engagement portion (531) and the limit portion (521).

5. The motor valve for the gas meter according to claim 4, wherein the limiting part (521) is provided as a convex key fixedly connected to the output gear (52); and the limiting matching part (531) is provided with a key groove formed in the first ratchet box (53), and the key groove is matched with the convex key.

6. The motor valve for the gas meter as claimed in claim 1, wherein the second ratchet box (55) is further provided with a limiting convex pillar (552), and the limiting convex pillar (552) and the central shaft (551) are distributed on the second ratchet box (55) at intervals.

7. The motor valve for a gas meter according to claim 6, wherein the direction of the limit boss (552) and the center axis (551) on the second ratchet case (55) is the same.

8. The motor valve for the gas meter according to claim 6, further comprising a motor (30), a gear box (40), a rack gear (60) and a rack (70), wherein the rack gear (60) is engaged with the rack (70), the gear shaft (51) and the output gear (52) are mounted on the gear box (40), and the transition gear (56) is selectively engageable with the rack gear (60) so that the motor (30) can drive the rack gear (60) to rotate through the gear box (40) and the ratchet transmission mechanism (50).

9. The motor valve for the gas meter according to claim 8, further comprising a housing case (10), wherein the ratchet transmission mechanism (50) and the rack gear (60) are mounted in the housing case (10), a fixed shaft (11) is disposed on the housing case (10), and the rack gear (60) is rotatably mounted on the fixed shaft (11).

10. The motor valve for the gas meter as claimed in claim 9, wherein a limit stop (12) is further mounted on the housing case (10), the limit stop (12) corresponds to the limit boss (552), and the limit stop (12) can limit the second ratchet case (55) to continue swinging relative to the housing case (10) through the limit boss (552).