Valve counter facilitating travel switch replacement

Abstract

The utility model discloses a valve counter facilitating the replacement of a travel switch, which comprises a mounting rack, an opening transmission shaft and a closing transmission shaft are arranged on the mounting rack, and an opening cam and a closing cam are respectively arranged at the end parts of the opening transmission shaft and the closing transmission shaft; the mounting rack is connected with two travel switches through a quick release assembly; the quick release assembly comprises a locking disc and two locking rods, the locking disc is arranged on the side, away from the travel switch, of the mounting frame, two first through holes are formed in the travel switch, two second through holes are formed in the mounting frame, two locking holes are formed in the locking disc, and the locking rods sequentially penetrate through the corresponding first through holes, the corresponding second through holes and the corresponding locking holes. One end of the lock rod is provided with a limiting flange which extends towards the periphery and is used for abutting the travel switch against the mounting frame, and the other end of the lock rod is provided with an elastic head which is used for abutting the locking disc against the mounting frame. According to the utility model, the travel switch on the counter can be assembled and disassembled without the help of an external tool, the assembly and disassembly are very convenient, and the working process of equipment cannot be delayed.

Description

Technical Field

[0001] The utility model relates to the technical field of counters, in particular to a valve counter which is convenient for replacing a travel switch. Background Art

[0002] Electric actuators are widely used in valve control in the fields of petroleum, natural gas, water treatment, and ships. These applications have extremely high requirements for the safety of electric actuators after power failure and the performance stability after re-operation. After the actuator is started, it is required to correctly transmit the same direction of movement regardless of forward or reverse rotation, accurately transmit the same torque, and be able to stop accurately when stopped.

[0003] In order to achieve precise stroke control of the actuator, a counter is often configured on the electric actuator. The two sets of gears on the counter control the stroke of the motor in the clockwise and counterclockwise directions respectively, and the stroke switch is the key to controlling the movement and stop of the motor to ensure that the valve can be fully opened or fully closed. The stroke switch on the counter on the market usually has two first through holes on the stroke switch, and two second through holes corresponding to the first through holes on the stroke switch are opened on the device seat of the counter. The screw passes through the first through hole and the second through hole and is fixedly installed on the device seat of the counter by nut locking, or the stroke switch is directly fixedly installed on the device seat of the counter by screw locking. Since the stroke switch is a consumable part, it needs to be replaced when damaged. Although the connection method of the stroke switch in the existing counter is relatively simple, it must be disassembled and assembled with the help of tools (wrench or screwdriver). When the user does not have the tools, it cannot be quickly replaced, which delays the working process of the equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a valve counter which is convenient for replacing a travel switch. The utility model can disassemble and assemble the travel switch on the counter without the aid of external tools, and the disassembly and assembly is very convenient and will not delay the working process of the equipment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve counter that is convenient for replacing a travel switch, comprising a mounting frame, an input shaft, an input gear, an opening gear set and a closing gear set, wherein the input gear is installed on the input shaft in a linkage manner, the opening gear set comprises an opening shaft arranged on the mounting frame and a plurality of opening counting gears axially rotatably arranged on the opening shaft, the closing gear set comprises a closing shaft arranged on the mounting frame and a plurality of closing counting gears axially rotatably arranged on the closing shaft, the mounting frame is also provided with an opening transmission shaft and a closing transmission shaft, a plurality of opening transmission gears respectively meshing with the corresponding opening counting gears are installed on the opening transmission shaft in a linkage manner, a plurality of closing transmission gears respectively meshing with the corresponding closing counting gears are installed on the closing transmission shaft in a linkage manner, the opening transmission shaft and the closing transmission shaft are installed in a linkage manner The ends of the shaft are respectively and linkedly installed with an opening cam and a closing cam; the mounting frame is connected to two travel switches for cooperating with the opening cam and the closing cam respectively through a quick-release assembly; the quick-release assembly includes a locking plate and two locking rods, the locking plate is arranged on a side of the mounting frame away from the travel switch, the travel switch is provided with two first through holes, the mounting frame is provided with two second through holes corresponding to the first through holes, the locking plate is provided with two locking holes, the locking rod sequentially passes through the corresponding first through hole, the second through hole and the locking hole, one end of the locking rod is provided with a limiting flange extending toward the periphery for pressing the travel switch against the mounting frame, the other end of the locking rod is provided with an elastic head for pressing the locking plate against the mounting frame, the inner diameters of the first through hole and the second through hole are not less than the maximum outer diameter of the elastic head, and the inner diameter of the locking hole is less than the maximum outer diameter of the elastic head.

[0006] By adopting the above technical solution, when installing the travel switch, it is only necessary to pass the lock rod through the first through hole, the second through hole and the lock hole in sequence, the limit flange at one end of the lock rod limits the travel switch on the mounting frame, and the elastic head at the other end of the lock rod limits the locking disk on the mounting frame, and two lock rod limits are set to prevent the travel switch from rotating, thereby positioning the travel switch; when removing the travel switch, it is only necessary to shrink and deform the elastic head, and then pull out the lock rod to remove the travel switch, thereby replacing the travel switch. For the replacement operation of the travel switch, the travel switch on the counter can be disassembled and assembled without the help of external tools, and the disassembly and assembly is very convenient and will not delay the working process of the equipment.

[0007] The utility model is further configured that the elastic head is in a conical shape with a diameter gradually decreasing in a direction away from the locking rod.

[0008] By adopting the above technical solution, the elastic head is designed as a conical guide structure, which is more convenient for it to pass through the lock hole of the locking disk.

[0009] The utility model is further configured that a cross gap is axially provided on the upper edge of the elastic head, and the cross gap divides the elastic head into four elastic claws which can be telescopically deformed inwardly and outwardly.

[0010] By adopting the above technical solution, the function of the elastic head being able to telescope and deform inside and outside can be realized.

[0011] The utility model is further configured that the locking rod comprises a main rod section and a secondary rod section, the outer diameter of the main rod section is greater than the outer diameter of the secondary rod section, and the cross gap extends to the secondary rod section.

[0012] By adopting the above technical solution, the cross gap is increased, so that the elastic claw can be more easily deformed and pass through the lock hole of the locking disk.

[0013] The utility model is further configured such that the locking disk is rotatably mounted on a mounting frame, and two arc-shaped holes are arranged on the locking disk around its own rotation center, the locking hole is arranged at one end of the arc-shaped hole, an unlocking hole is arranged at the other end of the locking disk corresponding to the arc-shaped hole, and the inner diameter of the unlocking hole is larger than the maximum outer diameter of the elastic head.

[0014] By adopting the above technical solution, when the elastic head is deformed and difficult to operate, it is only necessary to rotate the locking disk to align the elastic head with the unlocking hole, and then the locking rod can be directly pulled out, which is more convenient for disassembly of the travel switch.

[0015] The utility model is further configured that the inner wall of the arc-shaped hole is provided with an arc-shaped positioning protrusion for positioning the locking rod in the locking hole.

[0016] By adopting the above technical solution, the locking disk can be positioned in the locked state to prevent it from rotating and accidentally unlocking in the locked state.

[0017] The utility model is further configured that a circular hole is provided in the middle of the locking disk, and a cylindrical protrusion matching with the circular hole is provided on the mounting frame.

[0018] By adopting the above technical solution, the rotational installation of the locking disk can be achieved.

[0019] The utility model is further configured such that a plurality of anti-skid protrusions are evenly arranged on the outer circumference of the locking plate, and the edge position of the locking plate is exposed outside the mounting frame.

[0020] By adopting the above technical solution, it is convenient to rotate the locking disk.

[0021] The utility model is further configured that an elastic pad is sandwiched between the travel switch and the mounting frame.

[0022] By adopting the above technical solution, the elastic pad can not only protect the travel switch, but also apply a pre-tightening force to the travel switch when installing the travel switch, thereby improving the locking effect of the locking rod on the travel switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the first viewing direction of the overall structure of the utility model;

[0024] Figure 2 It is a second view structural schematic diagram of the utility model as a whole;

[0025] Figure 3 This is a schematic diagram of the installation structure of the travel switch of the utility model;

[0026] Figure 4 It is a cross-sectional view of the installation structure of the travel switch of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the locking disk of the utility model;

[0028] Figure 6 It is a structural schematic diagram of the locking rod of the utility model.

[0029] In the figure: 1. mounting frame; 2. input shaft; 3. input gear; 4. opening gear set; 5. closing gear set; 6. opening shaft; 7. opening counting gear; 8. closing shaft; 9. closing counting gear; 10. opening transmission shaft; 11. closing transmission shaft; 12. opening cam; 13. closing cam; 14. quick release assembly; 15. travel switch; 16. locking plate; 17. locking rod; 18. first through hole; 19. second through hole; 20. locking hole; 21. limiting flange; 22. elastic head; 23. cross gap; 24. elastic claw; 25. main rod section; 26. secondary rod section; 27. arc hole; 28. unlocking hole; 29. ​​arc positioning protrusion; 30. round hole; 31. cylindrical protrusion; 32. anti-slip protrusion; 33. elastic pad. DETAILED DESCRIPTION

[0030] 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.

[0031] Example: As shown in the attached Figures 1 to 6A valve counter for replacing a travel switch is shown, comprising a mounting frame 1, an input shaft 2, an input gear 3, an opening gear set 4 and a closing gear set 5, wherein the input gear 3 is mounted on the input shaft 2 in a linkage manner, the opening gear set 4 comprises an opening shaft 6 arranged on the mounting frame 1 and a plurality of opening counting gears 7 axially rotatably arranged on the opening shaft 6, the closing gear set 5 comprises a closing shaft 8 arranged on the mounting frame 1 and a plurality of closing counting gears 9 axially rotatably arranged on the closing shaft 8, the mounting frame 1 is also provided with an opening transmission shaft 10 and a closing transmission shaft 11, the opening transmission shaft 10 is linked with a plurality of opening transmission gears respectively meshing with the corresponding opening counting gears 7, the closing transmission shaft 11 is linked with a plurality of closing transmission gears respectively meshing with the corresponding closing counting gears 9, the ends of the opening transmission shaft 10 and the closing transmission shaft 11 are respectively linked with an opening cam 12 and a closing cam 13; the mounting frame 1 is provided with a quick-release assembly 14 is connected to two travel switches 15 respectively used to cooperate with the opening cam 12 and the closing cam 13; the quick release assembly 14 includes a locking plate 16 and two locking rods 17, the locking plate 16 is arranged on the side of the mounting frame 1 away from the travel switch 15, the travel switch 15 is provided with two first through holes 18, the mounting frame 1 is provided with two second through holes 19 corresponding to the first through holes 18, the first through holes 18 and the second through holes 19 have the same diameter, the locking plate 16 is provided with two locking holes 20, the locking rod 17 sequentially penetrates the corresponding first through hole 18, the second through hole 19 and the locking hole 20, one end of the locking rod 17 is provided with a limiting flange 21 extending toward the periphery for pressing the travel switch 15 against the mounting frame 1, the other end of the locking rod 17 is provided with an elastic head 22 for pressing the locking plate 16 against the mounting frame 1, the inner diameters of the first through hole 18 and the second through hole 19 are not less than the maximum outer diameter of the elastic head 22, and the inner diameter of the locking hole 20 is less than the maximum outer diameter of the elastic head 22. When installing the travel switch 15, it is only necessary to pass the locking rod 17 through the first through hole 18, the second through hole 19 and the locking hole 20 in sequence. The limit flange 21 at one end of the locking rod 17 limits the travel switch 15 on the mounting frame 1, and the elastic head 22 at the other end of the locking rod 17 limits the locking disk 16 on the mounting frame 1. The two locking rods 17 are set to limit, which can prevent the travel switch 15 from rotating, thereby positioning the travel switch 15. When removing the travel switch 15, it is only necessary to shrink and deform the elastic head 22, and then pull out the locking rod 17 to remove the travel switch 15, so as to replace the travel switch 15. For the replacement operation of the travel switch 15, the travel switch 15 on the counter can be disassembled and assembled without the help of external tools, and the disassembly and assembly is very convenient and will not delay the working process of the equipment.

[0032] As attached Figure 2 and attached Figure 6As shown, the elastic head 22 is in a conical shape with a diameter gradually decreasing in a direction away from the locking rod 17. Designing the elastic head 22 as a conical guide structure is more conducive to its passing through the locking hole 20 of the locking plate 16.

[0033] As attached Figure 6 As shown, a cross gap 23 is provided in the axial direction of the elastic head 22, and the cross gap 23 divides the elastic head 22 into four elastic claws 24 that can be telescopically deformed inwardly and outwardly. This design can realize the function of the elastic head 22 being telescopically deformed inwardly and outwardly.

[0034] As attached Figure 6 As shown, the locking rod 17 includes a main rod section 25 and a secondary rod section 26, the outer diameter of the main rod section 25 is larger than the outer diameter of the secondary rod section 26, and the cross gap 23 extends to the secondary rod section 26. The increase in the cross gap 23 can make the elastic claw 24 more easily deformable and pass through the locking hole 20 of the locking plate 16.

[0035] As attached Figures 3 to 5 As shown, the locking plate 16 is rotatably mounted on the mounting frame 1, and two arc holes 27 are arranged on the locking plate 16 around its own rotation center, the locking hole 20 is arranged at one end of the arc hole 27, and the other end of the locking plate 16 corresponding to the arc hole 27 is provided with an unlocking hole 28, and the inner diameter of the unlocking hole 28 is larger than the maximum outer diameter of the elastic head 22. When the elastic head 22 is deformed, it is only necessary to rotate the locking plate 16 to align the elastic head 22 with the unlocking hole 28, and the locking rod 17 can be directly pulled out, which is more convenient for disassembly of the travel switch 15.

[0036] As attached Figure 5 As shown, the inner wall of the arc hole 27 is provided with an arc-shaped positioning protrusion 29 for positioning the locking rod 17 in the locking hole 20. This design can position the locking plate 16 in the locked state to prevent it from rotating and accidentally unlocking in the locked state.

[0037] As attached Figure 3 As shown, a circular hole 30 is provided in the middle of the locking plate 16, and a cylindrical protrusion 31 matching with the circular hole 30 is provided on the mounting frame 1. This design can realize the rotation installation of the locking plate 16.

[0038] As attached Figure 5 As shown, a plurality of anti-skid protrusions 32 are evenly arranged on the outer periphery of the locking plate 16, and the edge of the locking plate 16 is exposed outside the mounting frame 1. This design facilitates the rotation operation of the locking plate 16.

[0039] As attached Figure 3 or attached Figure 4As shown, an elastic pad 33 is sandwiched between the travel switch 15 and the mounting frame 1, and the elastic pad 33 can be made of silicone or rubber. The elastic pad 33 can not only protect the travel switch 15, but also apply a pre-tightening force to the travel switch 15 when the travel switch 15 is installed, thereby improving the locking effect of the lock rod 17 on the travel switch 15.

Claims

1. A valve counter for facilitating replacement of a travel switch, comprising a mounting frame (1), an input shaft (2), an input gear (3), an opening gear set (4) and a closing gear set (5), wherein the input gear (3) is mounted on the input shaft (2) in a linkage manner, the opening gear set (4) comprises an opening shaft (6) arranged on the mounting frame (1) and a plurality of opening counting gears (7) axially rotatably arranged on the opening shaft (6), and the closing gear set (5) comprises a closing shaft (8) arranged on the mounting frame (1) and a plurality of opening counting gears (7) axially rotatably arranged on the closing shaft (8). The mounting frame (1) is provided with a plurality of closing counting gears (9), an opening transmission shaft (10) and a closing transmission shaft (11), the opening transmission shaft (10) is linked with a plurality of opening transmission gears respectively meshing with the corresponding opening counting gears (7), the closing transmission shaft (11) is linked with a plurality of closing transmission gears respectively meshing with the corresponding closing counting gears (9), and the ends of the opening transmission shaft (10) and the closing transmission shaft (11) are respectively linked with an opening cam (12) and a closing cam (13); the characteristics are as follows: The mounting frame (1) is connected to two travel switches (15) respectively used to cooperate with the opening cam (12) and the closing cam (13) through a quick release assembly (14); the quick release assembly (14) comprises a locking plate (16) and two locking rods (17); the locking plate (16) is arranged on a side of the mounting frame (1) away from the travel switch (15); the travel switch (15) is provided with two first through holes (18); the mounting frame (1) is provided with two second through holes (19) corresponding to the first through holes (18); the locking plate (16) is provided with two locking holes ( 20), the locking rod (17) sequentially passes through the corresponding first through hole (18), the second through hole (19) and the locking hole (20), one end of the locking rod (17) is provided with a limiting flange (21) extending toward the periphery for pressing the travel switch (15) against the mounting frame (1), the other end of the locking rod (17) is provided with an elastic head (22) for pressing the locking plate (16) against the mounting frame (1), the inner diameters of the first through hole (18) and the second through hole (19) are not less than the maximum outer diameter of the elastic head (22), and the inner diameter of the locking hole (20) is less than the maximum outer diameter of the elastic head (22).

2. A valve counter that facilitates replacement of travel switches according to claim 1, characterized in that: The elastic head (22) is in a conical shape with a diameter gradually decreasing in a direction away from the locking rod (17).

3. A valve counter that facilitates replacement of travel switches according to claim 2, characterized in that: A cross gap (23) is provided on the elastic head (22) along the axial direction, and the cross gap (23) divides the elastic head (22) into four elastic claws (24) that can be telescopically deformed inwardly and outwardly.

4. A valve counter that facilitates replacement of travel switches according to claim 3, characterized in that: The locking rod (17) comprises a main rod section (25) and a secondary rod section (26); the outer diameter of the main rod section (25) is greater than the outer diameter of the secondary rod section (26), and the cross gap (23) extends to the secondary rod section (26).

5. A valve counter that facilitates replacement of travel switches according to claim 1, characterized in that: The locking plate (16) is rotatably mounted on the mounting frame (1), and two arc-shaped holes (27) are arranged on the locking plate (16) around its own rotation center, the locking hole (20) is arranged at one end of the arc-shaped hole (27), and an unlocking hole (28) is arranged at the other end of the locking plate (16) corresponding to the arc-shaped hole (27), and the inner diameter of the unlocking hole (28) is greater than the maximum outer diameter of the elastic head (22).

6. A valve counter that facilitates replacement of travel switches according to claim 5, characterized in that: The inner wall of the arc-shaped hole (27) is provided with an arc-shaped positioning protrusion (29) for positioning the locking rod (17) in the locking hole (20).

7. A valve counter that facilitates replacement of travel switches according to claim 5, characterized in that: A circular hole (30) is provided in the middle of the locking plate (16), and a cylindrical protrusion (31) matching with the circular hole (30) is provided on the mounting frame (1).

8. A valve counter that facilitates replacement of travel switches according to claim 5, characterized in that: A plurality of anti-slip protrusions (32) are evenly arranged on the outer periphery of the locking plate (16), and the edge of the locking plate (16) is exposed outside the mounting frame (1).

9. A valve counter that facilitates replacement of travel switches according to claim 1, characterized in that: An elastic pad (33) is sandwiched between the travel switch (15) and the mounting frame (1).

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