Valve position feedback switch

Abstract

The utility model relates to a valve position feedback switch. The device comprises a shell, the sensor assembly comprises a sensor bracket mounted in the shell and a sensor mounted on the sensor bracket in a height-adjustable manner; the rotating assembly comprises a rotating shaft, an adjusting sleeve and a contact seat, a plurality of height adjusting holes are formed in the axial direction of the rotating shaft, the rotating shaft is sleeved with the adjusting sleeve, connecting holes matched with the height adjusting holes are formed in the adjusting sleeve, and the contact seat is located on the side of the sensor assembly and installed on the rotating shaft through the adjusting sleeve; a contact is mounted on the contact seat; the relative height of the contact and the sensor can be adjusted through the cooperation of the height adjusting hole and the connecting hole or the adjustment of the height of the sensor on the sensor support, and the contact seat can be driven by the rotating shaft to rotate and enables the contact to be in contact fit with the sensor. And the manufacturing cost is obviously reduced, the application range of the product can be expanded, and the requirements of different industrial environments are met.

Description

Technical Field

[0001] This utility model relates to the field of feedback switch technology, and in particular to a valve position feedback switch. Background Technology

[0002] In industrial automation, valves, as crucial devices for controlling media flow, require accurate feedback on their position status for the safety and stability of the system. Valve position feedback switches, as position sensing and control devices for valves, are widely used in valve control systems in process industries. They can display the valve's open / closed position in real time and provide feedback position signals, thereby enabling monitoring and control of the valve's status.

[0003] Currently, valve position feedback switches on the market are mainly divided into two categories of explosion-proof types: intrinsically safe (hereinafter referred to as "intrinsically safe") and flameproof (hereinafter referred to as "flameproof"). Intrinsically safe feedback switches are mainly used in industries requiring strict explosion-proof measures, such as polysilicon and PTA. Their design emphasizes preventing sparks or high-temperature surfaces generated by internal equipment from igniting combustion or explosion in an external explosive gas environment. Flameproof feedback switches, on the other hand, are mainly used in industries such as fine chemicals and petrochemicals. Through a robust housing design, they prevent the transfer of internal explosion energy to the outside, thereby protecting the safety of the external environment.

[0004] However, due to varying explosion-proof requirements across different applications, manufacturers often need to design different products for intrinsically safe and explosion-proof valve position feedback switches. This not only leads to diversity in product shape and size, increasing space requirements and installation complexity for customers, but also significantly increases manufacturing costs due to the need to produce and manage multiple components. Furthermore, fixed-type feedback switches are often only applicable to specific scenarios, lacking flexibility and failing to meet diverse market demands. Summary of the Invention

[0005] Therefore, this utility model provides a valve position feedback switch that can simultaneously meet the requirements of intrinsically safe and explosion-proof valve position feedback switches. It can not only significantly reduce manufacturing costs by sharing a housing and multiple internal parts, but also expand the product's application range to meet the needs of different industrial environments.

[0006] To solve the above-mentioned technical problems, this utility model provides a valve position feedback switch, comprising:

[0007] case;

[0008] The sensor assembly includes a sensor bracket mounted within the housing and a sensor height-adjustably mounted on the sensor bracket;

[0009] The rotating assembly comprises a rotating shaft, an adjusting sleeve, and a contact seat, a plurality of height adjusting holes are arranged on the rotating shaft in an axial direction, the adjusting sleeve is sleeved on the rotating shaft and is provided with a connecting hole matched with the height adjusting hole, the contact seat is arranged on the side of the sensor assembly and is mounted on the rotating shaft through the adjusting sleeve, and a contact is mounted on the contact seat.

[0010] The relative height of the contact and the sensor can be adjusted by matching or adjusting the height of the sensor on the sensor support through the height adjusting hole and the connecting hole, and the contact seat can be driven to rotate by the rotating shaft and be in contact with the sensor.

[0011] In an embodiment of the utility model, the sensor support comprises a connecting plate connected with the shell and wing plates extending from both ends of the connecting plate, each wing plate is provided with a vertical height adjusting hole and a vertical adjusting groove, and a bolt connecting piece is mounted on the vertical height adjusting hole and the vertical adjusting groove respectively to be connected with the shell of the sensor.

[0012] In an embodiment of the utility model, the contact seat is provided with a plurality of concentric circular arc grooves, the contact comprises a flat head stud penetrating through the circular arc groove and a hand nut threadedly matched with the flat head stud, and the head of the flat head stud can be in contact with the sensor.

[0013] In an embodiment of the utility model, the edge of each circular arc groove is provided with a scale indicating an angle.

[0014] In an embodiment of the utility model, the contact seat is provided with a stepped hole, the central axis of the stepped hole passes through the symmetric section of each circular arc groove, the bottom wall of the stepped hole is distributed with a positioning block, the adjusting sleeve comprises a cylinder and a limiting block extending radially and outwardly along the outer wall of the cylinder, the adjusting sleeve is in contact with the bottom wall of the stepped hole, the outer end surface of each limiting block is in abutment with the positioning block, and the connecting hole penetrates each limiting block in a radial direction.

[0015] In an embodiment of the utility model, the positioning block is distributed circumferentially along the stepped hole, each positioning block comprises a positioning plane, and the limiting block comprises an arc surface matched with the circumference of the stepped hole and a cut plane extending on both sides of the arc surface and in abutment with the positioning plane.

[0016] In an embodiment of the utility model, the height adjusting hole and the connecting hole are matched through an elastic cylindrical pin.

[0017] In an embodiment of the utility model, the shell is provided with first rotation support seat and second rotation support seat, rotation axis includes opposite first end and second end, first end and second end of rotation axis are connected in rotation respectively first rotation support seat with second rotation support seat, rotation axis still is equipped with spring, both ends of spring are respectively with contact seat and second rotation support seat abut.

[0018] In an embodiment of the utility model, still include dial, first end of rotation axis part extends first rotation support seat and is installed with drive piece, dial is installed drive piece and is surrounded with display cover with outer wall, dial is equipped with transparent protective cover that installs on the shell, install indication cover in transparent protective cover.

[0019] In an embodiment of the utility model, the sensor includes an inductive sensor, a mechanical sensor or a reed switch.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The valve position feedback switch includes a height-adjustable sensor support and a contact seat. The relative height of the contact and the sensor can be flexibly adjusted through the combination of the rotating shaft and the adjusting sleeve. The feedback switch can adapt to the installation position and sensing height of different sensors, and is suitable for the installation of inductive sensors, mechanical sensors, reed switch sensors and the like. The feedback switch has the characteristics of convenient installation and strong anti-interference ability, is suitable for process industrial control occasions such as refining, petrochemical, new energy and new materials, improves the adaptability and installation convenience of the product, and can meet the explosion-proof requirements of intrinsic safety type and explosion-proof type. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to the specific embodiments of the utility model and in combination with the drawings.

[0023] Figure 1 is the cross-sectional structure schematic view of the valve position feedback switch of the utility model.

[0024] Figure 2 is the shaft side structure schematic view of the valve position feedback switch of the utility model.

[0025] Figure 3 is the partial structure schematic view of the valve position feedback switch of the utility model.

[0026] Figure 4 is the structure schematic view of the sensor support of the utility model.

[0027] Figure 5Is the structure diagram of the contact seat of the utility model.

[0028] Figure 6 Is the structure diagram of the rotating shaft of the utility model.

[0029] Explanation of the drawing marks of the specification:

[0030] 1, shell;11, base;111, electrical interface;12, cover body;13, first rotating support seat;14, second rotating support seat;15, spring;16, first O-shaped ring;17, second O-shaped ring;18, third O-shaped ring;

[0031] 2, sensor assembly;21, sensor support;211, connecting plate;212, wing plate;213, vertical height adjustment hole;214, vertical adjustment groove;215, bolt connecting piece;22, sensor;

[0032] 3, rotating shaft;31, height adjustment hole;32, driving block;

[0033] 4, adjusting sleeve;41, connecting hole;42, barrel;43, limiting block;431, cambered surface;432, flat surface;

[0034] 5, contact seat;51, contact;511, flat head stud;512, hand nut;52, circular arc groove;53, stepped hole;54, positioning block;541, positioning plane;

[0035] 6, terminal;

[0036] 7, dial;71, display cover;72, indication cover;

[0037] 8, transparent protective cover. Specific embodiments

[0038] The utility model will be further explained in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0039] In the utility model, if the direction (up, down, left, right, front and back) is described, it is only for the convenience of describing the technical scheme of the utility model, and is not the indication or the implied technical characteristics must have a specific orientation, with a specific orientation structure and operation, therefore, it cannot be understood as the limitation of the utility model.

[0040] In the utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than", "less than", "exceed" and the like are understood as not including the number; "above", "below", "within" and the like are understood as including the number. In the description of the utility model, if "first" and "second" are described, they are only used for distinguishing technical features for the purpose, and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0041] In the utility model, unless otherwise explicitly limited, the words such as "arrangement", "installation", "connection" should be understood in a broad sense, for example, can be directly connected, can also be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected, can also be integrally formed; can be mechanically connected, can also be electrically connected or capable of intercommunication; can be the communication or interaction relationship between two elements. The person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0042] Referring to Figure 1 , Figure 2 , Figure 6 As shown in the utility model, a valve position feedback switch, comprising:

[0043] The shell 1 comprises a base 11 and a cover 12 which cooperate with each other; the shell 1 is designed according to GB / T3836.2 standard, can bear 4MPa water pressure, and ensures stability and safety under high pressure environment; the base is provided with electrical interfaces 111 on both sides;

[0044] The sensor assembly 2 comprises a sensor bracket 21 installed in the shell 1 and a sensor 22 installed on the sensor bracket 21 in height-adjustable mode;

[0045] The rotating assembly comprises a rotating shaft 3, an adjusting sleeve 4 and a contact seat 5, a plurality of height adjusting holes 31 are arranged on the rotating shaft 3 in the axial direction, the adjusting sleeve 4 is sleeved on the rotating shaft 3 and is provided with connecting holes 41 matched with the height adjusting holes 31, the contact seat 5 is installed on the rotating shaft 3 through the adjusting sleeve 4 on the side of the sensor assembly 2, and the contact seat 5 is provided with a contact 51;

[0046] The relative height of the contact 51 and the sensor 22 can be adjusted by matching the height adjusting holes 31 and the connecting holes 41 or adjusting the height of the sensor 22 on the sensor bracket 21, and the contact seat 5 can be driven to rotate by the rotating shaft 3 and make the contact 51 contact and match with the sensor 22.

[0047] In one embodiment, referring toFigure 3 , Figure 4 As shown, the sensor bracket 21 is bolted to the base 11. The sensor bracket 21 includes a connecting plate 211 connected to the housing 1 (base 11) and wing plates 212 extending from both ends of the connecting plate 211. Each wing plate 212 is provided with a vertical height adjustment hole 213 and a vertical adjustment groove 214. Bolt connectors 215 are respectively installed in the vertical height adjustment hole 213 and the vertical adjustment groove 214 to connect to the housing of the sensor 22.

[0048] The sensor bracket 21 is designed to be height-adjustable. Users can change the installation height of the sensor 22 by adjusting the position of the bolts, thereby achieving precise positioning of the sensor 22 on the bracket. This allows for flexible adaptation to different installation positions and sensing heights of the sensor 22. The sensor 22 includes an inductive sensor, a mechanical sensor, or a reed proximity switch. Users can select the appropriate sensor type 22 and adjust its installation height according to specific application requirements, enabling the sensor 22 to accurately sense changes in valve position and provide precise feedback signals.

[0049] In one embodiment, refer to Figure 1 As shown, the base 11 is also provided with a wiring terminal 6.

[0050] In one embodiment, refer to Figure 5 As shown, the contact base 5 is provided with multiple concentric arc grooves 52. The contact 51 includes a flat-head stud 511 passing through the arc groove 52 and a hand-tightening nut 512 threadedly engaging with the flat-head stud 511. The head of the flat-head stud 511 can contact and engage with the sensor 22. Each arc groove 52 has an angle-indicating scale on its edge. The multiple concentric arc grooves 52 and the angle-indicating scale allow the contact 51 to be adjusted at different angles to adapt to the installation requirements of different sensors 22. The design of the flat-head stud 511 and the hand-tightening nut 512 ensures that the contact 51 can accurately and securely contact the sensor 22, providing stable signal feedback.

[0051] In one embodiment, refer to Figure 5 As shown, the contact seat 5 is provided with a stepped hole 53. The central axis of the stepped hole 53 passes through the symmetrical cross section of each of the arc grooves 52. Positioning blocks 54 are distributed on the bottom wall of the stepped hole 53. The adjusting sleeve 4 includes a cylindrical body 42 and a limiting block 43 that extends radially outward symmetrically along the outer wall of the cylindrical body 42. The adjusting sleeve 4 contacts the bottom wall of the stepped hole 53 and the outer end face of each of the limiting blocks 43 abuts against the positioning block 54. The connecting hole 41 passes radially through each of the limiting blocks 43.

[0052] Reference Figure 5As shown, the positioning blocks 54 are circumferentially distributed along the stepped hole 53, each of the positioning blocks 54 includes a positioning plane 541, the limiting block 43 includes an arc surface 431 which circumferentially matches the stepped hole 53, and a cut plane 432 which extends on both sides of the arc surface 431 and abuts against the positioning plane 541.

[0053] In one embodiment, the height adjustment hole 31 and the connecting hole 41 are matched by an elastic cylindrical pin.

[0054] In one embodiment, referring to Figure 1 As shown, the shell 1 is provided with a first rotating support seat 13 and a second rotating support seat 14, the rotating shaft 3 includes oppositely arranged first and second ends, the first and second ends of the rotating shaft 3 are respectively rotatably connected to the first and second rotating support seats 13 and 14, and the rotating shaft 3 is further sleeved with a spring 15, both ends of the spring 15 abut against the contact point seat 5 and the second rotating support seat 14 respectively.

[0055] In one embodiment, referring to Figure 1 、 Figure 3 As shown, a dial 7 is further included, the first end of the rotating shaft 3 partially extends out of the first rotating support seat 13 and is installed with a driving block 32, the dial 7 is installed on the driving block 32 and is surrounded by a display cover 71 on the outer wall, the dial 7 is further sleeved with a transparent protective cover 8 which is installed on the shell 1, and an indication cover 72 is installed in the transparent protective cover 8.

[0056] Referring to Figure 1 As shown, first, second and third O-rings 16, 17 and 18 are respectively arranged between the base 11 and the cover 12, between the first and second rotating support seats 13 and 14 and the first and second ends of the rotating shaft 3, and between the transparent protective cover 8 and the cover 12. The sealing performance is enhanced, the internal components are ensured not to be affected by the external environment, and the possible explosion energy inside is prevented from being transmitted outward or the external contaminants from entering the inside. The sealing requirement is achieved, and the protection requirements of IP66, IP67 and IP68 (5m, 1h) are met.

[0057] In use, according to actual application requirements, a suitable type of sensor 22 (inductive sensor 22, mechanical sensor 22 or dry reed proximity switch) is selected and installed on the sensor support 21 (27), the mounting height of the sensor 22 is accurately adjusted by using the bolt connection 215 on the sensor support 21, adjusting the vertical height adjustment hole 213 and the vertical adjustment slot 214, or the position of the contact seat 5 is adjusted by rotating the shaft 3 and the adjusting sleeve 4 to ensure accurate cooperation between the contact 51 and the sensor 22, so that the sensor 22 can accurately sense the position change of the valve (the shaft 3 rotates when the position of the valve changes), the contact 51 is in contact or separated from the sensor 22 under the drive of the contact seat 5, the shaft 3 drives the dial 7 to rotate, and the position state of the valve is reflected in real time, the dial 7 provides intuitive valve state indication to the operator through the display cover 71 and the transparent protective cover 8, and real-time monitoring and operation are facilitated.

[0058] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A valve positioner switch, characterized by, The application relates to a sensor assembly. The sensor assembly comprises a shell (1), a sensor assembly (2) and a rotating assembly. The sensor assembly (2) comprises a sensor support (21) and a sensor (22) which are installed in the shell (1) and the sensor support (21) respectively. The rotating assembly comprises a rotating shaft (3), an adjusting sleeve (4) and a contact seat (5). The rotating shaft (3) is provided with a plurality of height adjusting holes (31) in the axial direction.

2. A valve positioner according to claim 1, wherein The adjusting sleeve (4) is sleeved on the rotating shaft (3) and is provided with connecting holes (41) matched with the height adjusting holes (31).

3. A valve positioner according to claim 1, wherein The contact seat (5) is installed on the rotating shaft (3) through the adjusting sleeve (4) and is provided with contacts (51).

4. A valve positioner according to claim 3, wherein The relative height between the contacts (51) and the sensor (22) can be adjusted by matching the height adjusting holes (31) and the connecting holes (41) or adjusting the height of the sensor (22) on the sensor support (21).

5. A valve positioner according to claim 3, wherein The contact seat (5) can be driven to rotate by the rotating shaft (3) and the contacts (51) can be matched with the sensor (22).

6. A valve positioner according to claim 5, wherein The sensor support (21) comprises a connecting plate (211) connected with the shell (1) and wing plates (212) extending from both ends of the connecting plate (211). Each wing plate (212) is provided with a vertical height adjusting hole (213) and a vertical adjusting groove (214). The vertical height adjusting hole (213) and the vertical adjusting groove (214) are respectively provided with bolt connecting members (215) connected with the shell of the sensor (22). The contact seat (5) is provided with a plurality of concentric circular arc grooves (52). The contact (51) comprises a flat head stud (511) penetrating through the circular arc groove (52) and a hand nut (512) threadedly matched with the flat head stud (511). The head of the flat head stud (511) can be matched with the sensor (22). The edge of each circular arc groove (52) is provided with an angle scale. The contact seat (5) is provided with a stepped hole (53) with a central axis passing through the symmetric section of each circular arc groove (52). The stepped hole (53) is provided with positioning blocks (54) on the bottom wall. The adjusting sleeve (4) comprises a cylinder (42) and limiting blocks (43) radially and symmetrically extending outward from the outer wall of the cylinder (42). The adjusting sleeve (4) is in contact with the bottom wall of the stepped hole (53) and the outer end surface of each limiting block (43) is in abutment with the positioning block (54). The connecting hole (41) penetrates through each limiting block (43) in the radial direction. There are four positioning blocks (54) circumferentially distributed along the stepped hole (53). Each positioning block (54) comprises a positioning plane (541). The limiting block (43) comprises an arc surface (431) matched with the circumference of the stepped hole (53) and a flat surface (432) extending from both sides of the arc surface (431) and abutting with the positioning plane (541).

7. A valve positioner according to claim 5, wherein The height adjustment hole (31) and the connecting hole (41) are matched by an elastic cylindrical pin.

8. A valve positioner according to claim 1 wherein, The shell (1) is provided with a first rotating support seat (13) and a second rotating support seat (14), the rotating shaft (3) comprises a first end and a second end arranged oppositely, the first end and the second end of the rotating shaft (3) are rotatably connected to the first rotating support seat (13) and the second rotating support seat (14) respectively, and the rotating shaft (3) is further sleeved with a spring (15), and the two ends of the spring (15) are respectively abutted against the contact seat (5) and the second rotating support seat (14).

9. A valve positioner according to claim 8, wherein Further comprising a scale disc (7), the first end of the rotating shaft (3) partially extends out of the first rotating support seat (13) and is installed with a driving block (32), the scale disc (7) is installed on the driving block (32) and is surrounded by an outer wall of a display cover (71), the scale disc (7) is further sleeved with a transparent protective cover (8) installed on the shell (1), and an indicating cover (72) is installed in the transparent protective cover (8).

10. A valve positioner according to claim 1, wherein The sensor (22) comprises an inductive sensor, a mechanical sensor or a reed switch.

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