Stroke measuring clamp for straight stroke valve

Abstract

The utility model belongs to the technical field of clamps, and discloses a straight stroke valve stroke measuring clamp which comprises a bearing piece, a clamping piece and an adjusting assembly, the bearing piece is provided with a first clamping part, the first clamping part is of a semicircular ring structure, and the inner wall of the first clamping part is provided with a first rubber layer; the clamping piece is provided with a second clamping part, the second clamping part is of a semi-circular ring structure, a second rubber layer is arranged on the inner wall of the second clamping part, the clamping piece is detachably connected with the bearing piece, and the first clamping part and the second clamping part define a circular ring structure so as to clamp and fix the valve rod; the adjusting assembly is movably installed on the bearing part in the radial direction of the circular ring structure and used for hooking a lead of the displacement sensor. The rubber layer is used for abutting against the valve rod, so that the valve rod is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, in particular to a linear stroke valve stroke measurement jig. Background Technique

[0002] A linear stroke valve, also known as a linear stroke electric control valve, is an important actuator instrument in industrial automation process control. When using a linear stroke valve, it is necessary to regularly conduct technical inspections on the valve to ensure that the valve can be smoothly opened, closed, and adjusted. For a general linear stroke valve, the moving distance of the valve stem is the moving stroke of the valve, which is an important basis for judging whether the valve is still working effectively.

[0003] Currently, the method for conducting technical inspections on valves to determine the valve stroke usually involves using a general clamp to hold the valve stem and using the handle of the clamp to pull the lead of the displacement sensor, thereby achieving stroke measurement. However, there are some problems with this existing detection method. For example, in order to increase the friction force between the general clamp and the valve stem, friction teeth are usually provided at the jaws. Although the friction teeth can increase the friction force, they are also likely to scratch the valve stem and shorten the service life of the valve stem. Content of the Utility Model

[0004] The purpose of the utility model is to provide a linear stroke valve stroke measurement jig that uses a rubber layer to abut against the valve stem to avoid damage to the valve stem.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A linear stroke valve stroke measurement jig for clamping the valve stem of a linear stroke valve, the linear stroke valve stroke measurement jig comprising:

[0007] A carrier member provided with a first clamping portion, the first clamping portion being a semi-circular ring structure, and a first rubber layer being provided on the inner wall of the first clamping portion;

[0008] A clamping member provided with a second clamping portion, the second clamping portion being a semi-circular ring structure, and a second rubber layer being provided on the inner wall of the second clamping portion. The clamping member is detachably connected to the carrier member, and the first clamping portion and the second clamping portion enclose a circular ring structure to clamp and fix the valve stem;

[0009] An adjusting assembly is movably mounted on the carrier member along the radial direction of the circular ring structure, and the adjusting assembly is used for hanging the lead of the displacement sensor.

[0010] As an alternative technical solution, the first clamping portion is provided with a first threaded hole, and a first locking screw is installed in the first threaded hole. The first locking screw is used to abut against the valve stem. The second clamping portion is provided with a second threaded hole, and a second locking screw is installed in the second threaded hole. The second locking screw is used to abut against the valve stem.

[0011] As an alternative technical solution, the central axis of the first locking screw coincides with the central axis of the second locking screw.

[0012] As an alternative technical solution, the central axis of the first locking screw is perpendicular to the adjustment direction of the adjustment assembly.

[0013] As an alternative technical solution, a third rubber layer is provided on the end face of the end of the first locking screw extending into the inner side of the first clamping portion;

[0014] A fourth rubber layer is provided on the end face of the end of the second locking screw extending into the inner side of the second clamping portion.

[0015] As an alternative technical solution, the carrier is provided with two third threaded holes, which are respectively located on both sides of the first clamping portion. The clamping member is provided with two fourth threaded holes, which are respectively located on both sides of the second clamping portion. The two third threaded holes and the two fourth threaded holes correspond to each other one by one, and the corresponding third threaded hole and the fourth threaded hole are installed with a third locking screw.

[0016] As an alternative technical solution, the adjustment assembly includes an adjustment member and a hanging rope screw. The adjustment member is movably installed on the carrier along the radial direction of the ring structure. The adjustment member is provided with a plurality of fifth threaded holes that are spaced apart along the radial direction of the ring structure. The hanging rope screw is installed in the fifth threaded hole, and the hanging rope screw is used to hang the lead wire of the displacement sensor.

[0017] As an alternative technical solution, the hanging rope screw includes a threaded section, a hanging rope section, and a hanging rope cap that are arranged in sequence. A nut is sleeved on the threaded section, and the lead wire of the displacement sensor is hung on the hanging rope section located between the hanging rope cap and the nut.

[0018] As an alternative technical solution, a slot is provided inside the carrier, and an opening slot is provided at the top of the carrier. Both the opening slot and the slot extend along the radial direction of the circular ring structure. The opening slot communicates with the slot and the width of the opening slot is smaller than the width of the slot. A section of the adjusting member provided with the fifth threaded hole is slidably inserted inside the slot. The threaded section passes through the opening slot and is threadedly connected to the fifth threaded hole. The nut presses against the top of the carrier, and the other end of the adjusting member extends outside the slot.

[0019] As an alternative technical solution, one end of the adjusting member extending outside the slot is successively provided with a limiting block, a bearing section, and a limiting cap. The limiting block can abut against the end of the carrier to limit the complete insertion of the adjusting member into the slot. A limiting slot is formed between the limiting block and the limiting cap, and the lead wire of the displacement sensor can be hooked on the bearing section in the limiting slot.

[0020] The beneficial effects of the present utility model:

[0021] The linear stroke valve stroke measuring fixture provided by the present utility model is used to clamp the valve stem of a linear stroke valve. The linear stroke valve stroke measuring fixture includes a carrier, a clamping member, and an adjusting assembly. The carrier is provided with a first clamping portion, and the first clamping portion is a semi-circular ring structure. The inner wall of the first clamping portion is provided with a first rubber layer; the clamping member is provided with a second clamping portion, and the second clamping portion is a semi-circular ring structure. The inner wall of the second clamping portion is provided with a second rubber layer. The clamping member is detachably connected to the carrier. The first clamping portion and the second clamping portion enclose a circular ring structure to clamp and fix the valve stem; the adjusting assembly is movably installed on the carrier along the radial direction of the circular ring structure, and the adjusting assembly is used to hook the lead wire of the displacement sensor.

[0022] The first clamping portion and the second clamping portion respectively clamp the valve stem from both sides. Since the inner wall of the first clamping portion is provided with the first rubber layer and the inner wall of the second clamping portion is provided with the second rubber layer, the rubber layer plays a buffering and protecting role to prevent the valve stem from being pinched and damaged. At the same time, it can also ensure that the linear stroke valve stroke measuring fixture can stably clamp the valve stem to avoid loosening or falling off. When there are some immovable objects such as fixed pipelines under the linear stroke valve, adjust the adjusting assembly along the radial direction of the circular ring structure so that the displacement sensor can follow the adjustment to avoid fixed objects such as fixed pipelines. Description of the Drawings

[0023] Figure 1 is the front view of the linear stroke valve stroke measuring fixture of the present utility model;

[0024] Figure 2 is the cross-sectional view of the linear stroke valve stroke measuring fixture of the present utility model.

[0025] In the figure:

[0026] 1. Carrier; 11. First clamping part; 12. First rubber layer; 13. Opening groove;

[0027] 2. Clamping part; 21. Second clamping part; 22. Second rubber layer;

[0028] 3. Adjusting assembly; 31. Adjusting part; 311. Limiting block; 312. Bearing section; 313. Limiting cap; 32. Hanging rope screw; 321. Thread section; 322. Hanging rope section; 323. Hanging rope cap;

[0029] 4. First locking screw;

[0030] 5. Second locking screw;

[0031] 6. Third rubber layer;

[0032] 7. Fourth rubber layer;

[0033] 8. Third locking screw;

[0034] 9. Nut. Detailed implementation mode

[0035] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] As Figure 1 and Figure 2 shown, the linear stroke valve stroke measurement fixture provided in this embodiment is used to clamp the valve stem of a linear stroke valve. The linear stroke valve stroke measurement fixture includes a carrier 1, a clamping member 2 and an adjustment assembly 3. The carrier 1 is provided with a first clamping portion 11. The first clamping portion 11 is a semi-circular ring structure, and the inner wall of the first clamping portion 11 is provided with a first rubber layer 12; the clamping member 2 is provided with a second clamping portion 21. The second clamping portion 21 is a semi-circular ring structure, and the inner wall of the second clamping portion 21 is provided with a second rubber layer 22. The clamping member 2 is detachably connected to the carrier 1. The first clamping portion 11 and the second clamping portion 21 enclose a circular ring structure to clamp and fix the valve stem; the adjustment assembly 3 is movably installed on the carrier 1 along the radial direction of the circular ring structure, and the adjustment assembly 3 is used to hang the lead wire of the displacement sensor.

[0040] Specifically, the first clamping portion 11 and the second clamping portion 21 clamp the valve stem from both sides respectively. Since the inner wall of the first clamping portion 11 is provided with the first rubber layer 12 and the inner wall of the second clamping portion 21 is provided with the second rubber layer 22, the first rubber layer 12 and the second rubber layer 22 play a buffering and protecting role for the valve stem, avoiding the valve stem from being clamped and damaged. At the same time, it can also ensure that the linear stroke valve stroke measurement fixture can stably clamp the valve stem, avoiding loosening or falling off. When there are some immovable objects such as fixed pipes below the linear stroke valve, adjust the adjustment assembly 3 along the radial direction of the circular ring structure so that the displacement sensor can be adjusted following the adjustment assembly 3 to avoid fixed objects such as fixed pipes.

[0041] The linear stroke valve stroke measuring fixture of this embodiment does not need to be provided with friction teeth, avoiding pinching the valve stem.

[0042] Optionally, the first clamping portion 11 is provided with a first threaded hole, and a first locking screw 4 is installed in the first threaded hole. The first locking screw 4 is used to abut against the valve stem. The second clamping portion 21 is provided with a second threaded hole, and a second locking screw 5 is installed in the second threaded hole. The second locking screw 5 is used to abut against the valve stem.

[0043] In the traditional detection scheme, universal clamps with different opening sizes need to be matched for valve stems with different diameter sizes, which is inconvenient to carry and has a high cost.

[0044] To solve the above problems, in this embodiment, by adjusting the first locking screw 4 and the second locking screw 5, that is, the first locking screw 4 passes through the through hole of the first threaded hole and the first rubber layer 12 and then abuts against the outer wall of the valve stem, and the second locking screw 5 passes through the through hole of the second threaded hole and the second rubber layer 22 and then abuts against the outer wall of the valve stem. Therefore, the valve stem with a small diameter can be clamped and fixed.

[0045] In this embodiment, the central axis of the first locking screw 4 coincides with the central axis of the second locking screw 5, and the first locking screw 4 and the second locking screw 5 respectively abut against the outer wall of the valve stem from both sides.

[0046] In some other embodiments, the central axis of the first locking screw 4 and the central axis of the second locking screw 5 are arranged at an angle, and the first locking screw 4, the second locking screw 5, the first rubber layer 12 and the second rubber layer 22 all abut against the outer wall of the valve stem.

[0047] In this embodiment, the central axis of the first locking screw 4 is perpendicular to the adjustment direction of the adjustment assembly 3.

[0048] Optionally, the end face of the first locking screw 4 extending into the inner side of the first clamping portion 11 is provided with a third rubber layer 6. The third rubber layer 6 is located between the first locking screw 4 and the valve stem, playing a role of buffering and protection, avoiding pinching the valve stem, and being able to increase the friction force.

[0049] Optionally, the end face of the second locking screw 5 extending into the inner side of the second clamping portion 21 is provided with a fourth rubber layer 7. The fourth rubber layer 7 is between the second locking screw 5 and the valve stem, playing a role of buffering and protection, avoiding pinching the valve stem, and being able to increase the friction force.

[0050] Optionally, the carrier 1 is provided with two third threaded holes, which are respectively located on both sides of the first clamping portion 11. The clamping member 2 is provided with two fourth threaded holes, which are respectively located on both sides of the second clamping portion 21. The two third threaded holes and the two fourth threaded holes correspond to each other one by one, and the corresponding third threaded hole and fourth threaded hole are installed with a third locking screw 8.

[0051] In this embodiment, the carrier 1 and the clamping member 2 are fixedly connected by two third locking screws 8, so as to ensure the clamping force on the valve stem and avoid loosening and sliding.

[0052] Optionally, the adjusting assembly 3 includes an adjusting member 31 and a hanging rope screw 32. The adjusting member 31 is movably installed on the carrier 1 along the radial direction of the circular ring structure. The adjusting member 31 is provided with a plurality of fifth threaded holes spaced apart along the radial direction of the circular ring structure. The hanging rope screw 32 is installed in the fifth threaded hole, and the hanging rope screw 32 is used for hanging the lead wire of the displacement sensor.

[0053] The number of the fifth threaded holes opened in the adjusting member 31 can be set according to actual needs, such as three, four, or even more.

[0054] In some embodiments, each fifth threaded hole is provided with a hanging rope screw 32, and each hanging rope screw 32 respectively hangs the lead wire of a displacement sensor. Multiple displacement sensors are used for detection to obtain their average value, thereby improving the detection accuracy.

[0055] In this embodiment, the hanging rope screw 32 is provided as one, and this hanging rope screw 32 can be installed in a certain fifth threaded hole according to actual needs.

[0056] Optionally, the hanging rope screw 32 includes a threaded section 321, a hanging rope section 322, and a hanging rope cap 323 arranged in sequence. A nut 9 is sleeved on the threaded section 321, and the lead wire of the displacement sensor is hung on the hanging rope section 322 located between the hanging rope cap 323 and the nut 9.

[0057] The threaded section 321 is threadedly connected to the fifth threaded hole, and the nut 9 presses against the carrier 1, thereby locking the adjusting member 31 to the carrier 1.

[0058] In some embodiments, the nut 9 is welded to the threaded section 321. In other embodiments, the nut 9 is rotatably sleeved on the threaded section 321.

[0059] Optionally, a slot is provided inside the carrier 1, and an opening slot 13 is provided at the top of the carrier 1. Both the opening slot 13 and the slot extend along the radial direction of the circular ring structure. The opening slot 13 is communicated with the slot and the width of the opening slot 13 is smaller than that of the slot. A section of the adjusting member 31 provided with the fifth threaded hole is slidably inserted into the slot. The threaded section 321 passes through the opening slot 13 and is threadedly connected to the fifth threaded hole. The nut 9 is pressed against the top of the carrier 1, and the other end of the adjusting member 31 extends out of the slot. The slot guides the adjusting direction of the adjusting member 31.

[0060] Optionally, one end of the adjusting member 31 extending out of the slot is successively provided with a limiting block 311, a bearing section 312, and a limiting cap 313. The limiting block 311 can abut against the end of the carrier 1 to limit the complete insertion of the adjusting member 31 into the slot. A limiting groove is formed between the limiting block 311 and the limiting cap 313, and the lead wire of the displacement sensor can be hung on the bearing section 312 in the limiting groove.

[0061] In this embodiment, the bearing section 312 can also hang the lead wire of the displacement sensor, and this displacement sensor is the farthest from the valve stem.

[0062] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Linear stroke valve stroke measurement fixture, used for clamping the valve stem of a linear stroke valve, characterized in that, The linear stroke valve stroke measuring fixture includes: A carrier (1), the carrier (1) is provided with a first clamping portion (11), the first clamping portion (11) is a semi-circular ring structure, and the inner wall of the first clamping portion (11) is provided with a first rubber layer (12); A clamping member (2), the clamping member (2) is provided with a second clamping portion (21), the second clamping portion (21) is a semi-circular ring structure, the inner wall of the second clamping portion (21) is provided with a second rubber layer (22), the clamping member (2) is detachably connected to the carrier (1), and the first clamping portion (11) and the second clamping portion (21) enclose a circular ring structure to clamp and fix the valve stem; An adjusting assembly (3), which is movably installed on the carrier (1) along the radial direction of the circular ring structure, and the adjusting assembly (3) is used for hanging the lead of the displacement sensor.

2. The linear stroke valve stroke measurement fixture according to claim 1, wherein, The first clamping portion (11) is provided with a first threaded hole, and a first locking screw (4) is installed in the first threaded hole. The first locking screw (4) is used to abut against the valve stem. The second clamping portion (21) is provided with a second threaded hole, and a second locking screw (5) is installed in the second threaded hole. The second locking screw (5) is used to abut against the valve stem.

3. The linear stroke valve stroke measuring fixture according to claim 2, characterized in that, The central axis of the first locking screw (4) coincides with the central axis of the second locking screw (5).

4. The linear travel valve travel measurement fixture according to claim 3, wherein, The central axis of the first locking screw (4) is perpendicular to the adjusting direction of the adjusting assembly (3).

5. The linear stroke valve stroke measurement fixture according to claim 2, wherein, The end face of the end of the first locking screw (4) extending into the inner side of the first clamping portion (11) is provided with a third rubber layer (6); The end face of the end of the second locking screw (5) extending into the inner side of the second clamping portion (21) is provided with a fourth rubber layer (7).

6. The linear stroke valve stroke measurement fixture according to any one of claims 1-5, characterized in that, The carrier (1) is provided with two third threaded holes, and the two third threaded holes are respectively located on both sides of the first clamping portion (11). The clamping member (2) is provided with two fourth threaded holes, and the two fourth threaded holes are respectively located on both sides of the second clamping portion (21). The two third threaded holes and the two fourth threaded holes correspond one by one, and a third locking screw (8) is installed in the corresponding third threaded hole and the fourth threaded hole.

7. The linear stroke valve stroke measurement fixture according to any one of claims 1-5, characterized in that, The adjusting assembly (3) includes an adjusting member (31) and a hanging rope screw (32). The adjusting member (31) is movably installed on the carrier (1) along the radial direction of the circular ring structure. The adjusting member (31) is provided with a plurality of fifth threaded holes spaced apart along the radial direction of the circular ring structure. The hanging rope screw (32) is installed in the fifth threaded hole, and the hanging rope screw (32) is used for hanging the lead of the displacement sensor.

8. The linear stroke valve stroke measurement fixture according to claim 7, characterized in that, The hanging rope screw (32) includes a threaded section (321), a hanging rope section (322), and a hanging rope cap (323) arranged in sequence. A nut (9) is sleeved on the threaded section (321), and the lead of the displacement sensor is hung on the hanging rope section (322) between the hanging rope cap (323) and the nut (9).

9. The linear stroke valve stroke measuring fixture according to claim 8, wherein, The interior of the carrier (1) is provided with a slot, and the top of the carrier (1) is provided with an opening slot (13). Both the opening slot (13) and the slot extend along the radial direction of the circular ring structure. The opening slot (13) communicates with the slot and the width of the opening slot (13) is smaller than the width of the slot. A section of the adjusting member (31) provided with the fifth threaded hole is slidably inserted into the interior of the slot. The threaded section (321) passes through the opening slot (13) and is threadedly connected to the fifth threaded hole. The nut (9) presses against the top of the carrier (1), and the other end of the adjusting member (31) extends out of the slot.

10. The linear travel valve stroke measuring fixture according to claim 9, wherein, One end of the adjusting member (31) extending out of the slot is successively provided with a limiting block (311), a bearing section (312), and a limiting cap (313). The limiting block (311) can abut against the end of the carrier (1) to limit the complete insertion of the adjusting member (31) into the slot. A limiting groove is formed between the limiting block (311) and the limiting cap (313). The lead wire of the displacement sensor can be hooked on the bearing section (312) in the limiting groove.

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