A valve actuator limit switch

Abstract

The utility model relates to a valve actuator limit switch, comprising a shell, a transmission shaft vertically rotatably arranged on the shell, the transmission shaft is fixedly connected with a trigger component in the shell, a micro switch located on the rotation path of the trigger component is also arranged in the shell, a transparent cover is fixed on the upper side of the shell, a covering member is fixedly arranged on the inner side wall of the transparent cover, two exposure openings are symmetrically provided on the covering member, an indicator is arranged in the covering member, the upper end of the transmission shaft penetrates the shell and is fixedly connected to the indicator, the indicator is a truncated cone with an opening at the lower end, the indicator comprises an upper circular plate and an annular side wall integrally formed on the lower side of the edge of the upper circular plate, an annular groove with an opening facing upwards is arranged in the annular side wall, a marking opening penetrating into the annular groove is also arranged on the outer side surface of the annular side wall, an marking ring is rotatably arranged in the annular groove, an OPEN mark, a CLOSED mark, a fully open mark and a fully closed mark are arranged on the marking ring, and the marking of the indicator on the utility model can be switched in different languages.

Description

Technical Field

[0001] The utility model relates to the technical field of limit switches, in particular to a limit switch for a valve actuator. Background Art

[0002] The valve actuator limit switch is a device installed on a pneumatic, electric or hydraulic valve actuator to detect the fully open (OPEN) and fully closed (CLOSED) positions of the valve. It can also be used to control the upper and lower travel stops of the actuator, protecting the upper and lower limits of the actuator.

[0003] When the existing valve actuator is working, such as a limit switch for an actuator with patent publication number CN217108466U, in order to be able to directly observe the opening and closing degree of the valve on site instead of only being able to view it in a remote control room, an indicator is installed at the end of the limit switch transmission rod, the indicator rotates with the transmission shaft, and a fixed protective cover is provided outside the indicator, and a visual window is formed on the protective cover to facilitate observation of the actual opening and closing degree of the valve. However, the markings on the existing indicators generally only have one language to express the position of the valve, that is, OPEN and CLOSED, and it is difficult to switch to other languages. However, if the user is a worker whose English proficiency is not very good, it is difficult to view and understand. In view of this technical problem, a valve actuator limit switch is needed whose markings on the indicator can be switched to different languages. Utility Model Content

[0004] The utility model provides a valve actuator limit switch with a mark on an indicator capable of switching between different languages, thereby solving the above-mentioned problems existing in the use process of the prior art.

[0005] The technical solution of the utility model is achieved as follows: a valve actuator limit switch comprises a shell, a transmission shaft vertically rotatably arranged on the shell, the transmission shaft is fixedly connected with a trigger component in the shell, the shell is also provided with a micro switch located on the rotation path of the trigger component, a transparent cover is fixedly connected to the upper side of the shell, a covering member is fixedly arranged on the inner side wall of the transparent cover, two exposure openings are symmetrically provided on the covering member, an indicator is provided in the covering member, the upper end of the transmission shaft penetrates through the shell and is fixedly connected to the indicator, the indicator is a truncated cone with an opening at the lower end, the indicator comprises an upper circular plate and an annular side wall integrally formed on the lower side of the edge of the upper circular plate, an annular groove with an opening facing upward is provided in the annular side wall, an identification opening penetrating into the annular groove is also provided on the outer side surface of the annular side wall, an identification ring is rotatably arranged in the annular groove, and an OPEN identification, a CLOSED identification, a fully open identification and a fully closed identification are provided on the identification ring.

[0006] Preferably, the identification openings are four in a circle, and the OPEN identification, CLOSED identification, fully open identification and fully closed identification are each provided with two and are symmetrically arranged, the two OPEN identifications and the two CLOSED identifications are equidistantly staggered on the identification ring, the two fully open identifications and the two fully closed identifications are equidistantly staggered on the identification ring, and the identification openings are located on the rotation paths of the OPEN identification, the CLOSED identification, the fully open identification and the fully closed identification.

[0007] Preferably, a single identification opening is only used to expose a single OPEN identification or CLOSED identification or a fully open identification or a fully closed identification.

[0008] Preferably, the upper end of the identification ring is fixedly connected to a rotating ring located on the upper circular plate, and a plurality of easily rotatable protrusions are fixedly connected to the rotating ring.

[0009] Preferably, a threaded hole is provided on the upper circular plate, a through hole is provided on the rotating ring, two through holes are provided, and an angle between the two through holes and the center of the rotating ring is 45°.

[0010] Preferably, a connecting sleeve is integrally formed on the upper circular plate, and a clamping strip is axially fixedly connected to the inner side wall of the connecting sleeve, and four clamping strips are circumferentially arranged. An insert block is fixedly connected to the upper end of the transmission shaft, and the insert block is inserted into the connecting sleeve and abuts against each of the clamping strips. A limit plate is fixedly connected to the connecting sleeve and abuts against the transmission shaft and the upper side of the insert block, and the limit plate is provided with a screw threadedly connected to the transmission shaft.

[0011] Preferably, a connecting outer edge is integrally formed on the lower edge of the transparent cover, and a second screw is provided between the connecting outer edge and the shell.

[0012] In summary, the beneficial effects of the present invention are:

[0013] 1. The utility model can switch the logo displayed on the indicator. The switching can be completed by rotating the logo ring so that the English logo (OPEN logo, CLOSED logo) on the logo ring is exposed from the logo port or the Chinese logo (full open logo, full closed logo) is exposed from the logo port. The utility model can be switched and adjusted by the user according to different user groups, so as to be convenient for different users to use.

[0014] 2. The setting of the rotating ring and the rotating protrusion connected to the upper end of the identification ring makes it easy for the user to rotate the identification ring, and the setting of the threaded hole on the circular plate and the two through holes on the rotating ring makes it easy to fix the identification ring with screws after it is rotated, so that the identification ring remains in the adjusted state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the transparent cover in the utility model exploding upward;

[0019] Figure 4 It is a schematic diagram of the structure of the transparent cover and the covering member exploded in the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the utility model in which the transparent cover and the covering member are removed and the indicator explodes upward;

[0021] Figure 6 It is a structural schematic diagram of the indicator in the utility model;

[0022] Figure 7 This is a schematic diagram of the connection structure between the transmission shaft and the indicator in the utility model;

[0023] Figure 8 It is a schematic diagram of the explosion structure of the indicator in the utility model;

[0024] Fig. 9 It is a schematic diagram of the structure after the indicator in the utility model is switched to the Chinese identification state.

[0025] In the figure: 1. housing; 11. screw; 2. transmission shaft; 21. plug; 3. trigger component; 4. micro switch; 5. transparent cover; 51. connecting outer edge; 52. second screw; 6. covering member; 61. exposure opening; 7. indicator; 71. upper circular plate; 711. threaded hole; 72. annular side wall; 721. annular groove; 722. marking opening; 73. connecting sleeve; 731. clamping strip; 732. limit plate; 74. screw; 8. marking ring; 81. OPEN marking; 82. CLOSED marking; 83. fully open marking; 84. fully closed marking; 9. rotating ring; 91. easy-to-rotate protrusion; 92. through hole. DETAILED DESCRIPTION

[0026] The following will be combined with the attached embodiment of the utility model Figure 1-9 , 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 them. Based on the embodiments of 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.

[0027] Example:

[0028] like Figures 1 to 9 As shown, the utility model discloses a valve actuator limit switch, including a shell 1, a transmission shaft 2 vertically rotatably arranged on the shell 1, the transmission shaft 2 is fixedly connected with a trigger component 3 in the shell 1, and a micro switch 4 located on the rotation path of the trigger component 3 is also provided in the shell 1. The lower end of the transmission shaft 2 is used to cooperate with the connecting shaft of the valve actuator. When the valve actuator drives the valve to rotate, the transmission shaft 2 can also rotate accordingly. The rotation of the transmission shaft 2 drives the trigger component 3. Through the cooperation of the trigger component 3 and the micro switch 4, the opening or closing position of the valve is fed back to the remote controller or computer in the form of a switch signal. The above-mentioned trigger component 3 and micro switch 4 are all prior arts. The utility model does not make any improvements to the above-mentioned structure, so the specific structure will not be repeated.

[0029] In the utility model, a transparent cover 5 is fixedly connected to the upper side of the shell 1, and a covering member 6 is fixedly arranged on the inner side wall of the transparent cover 5. The covering member 6 has two exposure openings 61 symmetrically provided thereon, and an indicator 7 is arranged inside the covering member 6. The upper end of the transmission shaft 2 penetrates through the shell 1 and is fixedly connected to the indicator 7, that is, when the transmission shaft 2 rotates, it can drive the indicator 7 to rotate together. The specific shape of the indicator 7 is a truncated cone with an opening at the lower end. The indicator 7 specifically includes an upper circular plate 71 and an annular side wall 72 integrally formed on the lower side of the edge of the upper circular plate 71, and an annular groove 721 with an opening facing upward is provided in the annular side wall 72, and an identification opening 722 penetrating into the annular groove 721 is also provided on the outer side surface of the annular side wall 72, and an identification ring 8 is rotatably arranged in the annular groove 721, and an OPEN identification 81, a CLOSED identification 82, a fully open identification 83 and a fully closed identification 84 are provided on the identification ring 8.

[0030] Among them, there are four identification openings 722 equidistantly opened on the circumference, and two OPEN identification 81, CLOSED identification 82, fully open identification 83 and fully closed identification 84 are each provided and symmetrically arranged, the OPEN identification 81 and the CLOSED identification 82 are English identifications, and the fully open identification 83 and the fully closed identification 84 are Chinese identifications, wherein the two OPEN identifications 81 and the two CLOSED identifications 82 are equidistantly staggered on the identification ring 8, and the two fully open identifications 83 and the two fully closed identifications 84 are equidistantly staggered on the identification ring 8. It should also be noted that the identification openings 722 are located on the rotation path of the OPEN identification 81, the CLOSED identification 82, the fully open identification 83 and the fully closed identification 84, and a single identification opening 722 is only for a single OPEN identification 81 or a CLOSED identification 82 or a fully open identification 83 or a fully closed identification 84 to be exposed. Through the above settings, the logo on the indicator 7 can have two states. The first state is the English state, in which the two OPEN logos 81 and the two CLOSED logos 82 are respectively exposed from the four logo openings 722. The second state is the Chinese state, in which the two fully open logos 83 and the two fully closed logos 84 are respectively exposed from the four logo openings 722. To select one of the two states, the state can be switched by rotating the logo ring 8. The user can select and switch according to whether he needs the English logo or the Chinese logo. For example, if the user switches between the two states, An OPEN mark 81 and two CLOSED marks 82 are exposed from the mark opening 722. Then, when in use, when the indicator 7 is rotated to the point where the mark opening 722 corresponds to the exposure opening 61 on the cover 6, the OPEN mark 81 or the CLOSED mark 82 will be visible to the user. Since there are only two exposure openings 61 symmetrically arranged, only one of the two symmetrical OPEN marks 81 or the two symmetrical CLOSED marks 82 will be visible to the user from the exposure opening 61, thereby allowing the user to simply and clearly see the current status of the valve.

[0031] In order to facilitate the rotation of the identification ring 8, a rotating ring 9 located on the upper circular plate 71 is fixedly connected to the upper end of the identification ring 8, and a plurality of easy-rotating protrusions 91 are fixedly connected to the rotating ring 9. The user can control the rotation of the rotating ring 9 by pushing the easy-rotating protrusions 91 with fingers.

[0032] In addition, in order to be able to fix the rotating ring 9 after completing the state switching, a threaded hole 711 is opened on the upper circular plate 71, and a through hole 92 is opened on the rotating ring 9. The through holes 92 are provided with two, and the angle between the two through holes 92 and the center of the rotating ring 9 is 45°. Because the rotating ring 9 can complete the switching of different text states after rotating 45°, the two through holes 92 respectively correspond to the threaded hole 711 when the mark on the rotating ring 9 is in different states, and then it is fixed by the screw 11, so that the identification ring 8 can be kept in the adjusted state.

[0033] The specific structure for fixing the transmission shaft 2 and the indicator 7 is as follows: a connecting sleeve 73 is integrally formed on the upper circular plate 71, and a clamping strip 731 is axially fixedly connected to the inner side wall of the connecting sleeve 73, and four clamping strips 731 are circumferentially arranged, and an insert block 21 is fixedly connected to the upper end of the transmission shaft 2. The insert block 21 is inserted into the connecting sleeve 73 and abuts against each clamping strip 731, thereby preventing the insert block 21 from rotating relative to the connecting sleeve 73, and a limit plate 732 is fixedly connected in the connecting sleeve 73 to abut against the upper side of the transmission shaft 2 and the insert block 21, and a screw 74 threadedly connected to the limiting plate 732 is provided on the limiting plate 732, and the transmission shaft 2 and the indicator 7 are locked by the screw 74.

[0034] The specific structure of the transparent cover 5 fixed on the shell 1 is that a connecting outer edge 51 is integrally formed on the lower edge of the transparent cover 5, and a second screw 52 is provided between the connecting outer edge 51 and the shell 1, and the transparent cover 5 is fixed to the shell 1 through the second screw 52.

[0035] It should also be pointed out that the terms used in the present invention, such as “front”, “rear”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve actuator limit switch, comprising a housing, a transmission shaft vertically rotatably arranged on the housing, the transmission shaft being fixedly connected with a trigger component in the housing, and a micro switch located on the rotation path of the trigger component in the housing, characterized in that: A transparent cover is fixedly connected to the upper side of the shell, a covering member is fixedly provided on the inner wall of the transparent cover, the covering member has two exposure openings symmetrically provided on the covering member, an indicator is provided in the covering member, the upper end of the transmission shaft penetrates through the shell and is fixedly connected to the indicator, the indicator is in the shape of a truncated cone with an opening at the lower end, the indicator comprises an upper circular plate and an annular side wall integrally formed on the lower side of the edge of the upper circular plate, an annular groove opening upward is provided in the annular side wall, an identification opening penetrating into the annular groove is also provided on the outer side surface of the annular side wall, an identification ring is rotatably provided in the annular groove, and an OPEN identification, a CLOSED identification, a fully open identification and a fully closed identification are provided on the identification ring.

2. A valve actuator limit switch according to claim 1, characterized in that: The identification openings are provided with four in a circle, and the OPEN identification, CLOSED identification, fully open identification and fully closed identification are each provided with two and are symmetrically arranged respectively. The two OPEN identifications and the two CLOSED identifications are equidistantly staggered on the identification ring, and the two fully open identifications and the two fully closed identifications are equidistantly staggered on the identification ring. The identification openings are located on the rotation paths of the OPEN identification, the CLOSED identification, the fully open identification and the fully closed identification.

3. A valve actuator limit switch according to claim 2, characterized in that: The single identification opening is only for exposing a single OPEN identification or CLOSED identification or a fully open identification or a fully closed identification.

4. A valve actuator limit switch according to claim 1, characterized in that: The upper end of the identification ring is fixedly connected with a rotating ring located on the upper circular plate, and a plurality of easily rotatable protrusions are fixedly connected to the rotating ring.

5. A valve actuator limit switch according to claim 4, characterized in that: The upper circular plate is provided with a threaded hole, the rotating ring is provided with a through hole, two through holes are provided, and the angle between the two through holes and the center of the rotating ring is 45°.

6. A valve actuator limit switch according to claim 1, characterized in that: A connecting sleeve is integrally formed on the upper circular plate, and a clamping strip is axially fixedly connected to the inner side wall of the connecting sleeve, and four clamping strips are circumferentially arranged. An insert block is fixedly connected to the upper end of the transmission shaft, and the insert block is inserted into the connecting sleeve and abuts against each of the clamping strips. A limiting plate is fixedly connected to the connecting sleeve and abuts against the upper side of the transmission shaft and the insert block, and a screw threadedly connected to the transmission shaft is provided on the limiting plate.

7. A valve actuator limit switch according to claim 1, characterized in that: A connecting outer edge is integrally formed on the lower end edge of the transparent cover, and a second screw is arranged between the connecting outer edge and the shell.

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