Rapid measuring device for limit value of extension amount of valve rod of gate valve

Abstract

The utility model relates to the technical field of measuring instruments, in particular to a rapid measuring instrument for the limit value of the extension amount of a valve rod of a gate valve, which comprises a measuring instrument body and a plurality of measuring scales distributed on the measuring instrument body, and a measuring part for measuring the extension amount of the valve rod is formed between every two adjacent measuring scales. The device is used for quickly measuring and judging whether the extension amount of the valve rod is qualified or not, and the measuring scales with different lengths are used for measuring valve rods of gate valves with different specifications, so that the measuring time is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to a rapid measuring instrument for a gate valve stem extension limit value. Background Art

[0002] As a representative of linear lifting wedge-sealed valves, the gate valve's opening and closing parts are gate plates, which are used to connect or block the medium in the pipeline. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened or fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. During use, the gate plate should be avoided from being opened slightly. The erosion of high-speed flowing media will accelerate the damage to the sealing surface, resulting in defects such as poor sealing and rust. The sealing surfaces of the gate valve and the valve seat are provided with corrosion-resistant and wear-resistant alloy sealing surfaces to protect them from corrosion and erosion by the medium.

[0003] In the gate valve, the actuator acts as a driving part, and the valve stem is connected between the actuator and the gate as a follower. The valve stem drives the gate to reciprocate along the axial direction of the vertical flow channel. The extension of the valve stem relative to the valve stem nut determines the stroke range of the gate, and the stroke range determines whether the gate can be opened and closed in place, so it is necessary to measure the extension of the valve stem relative to the valve stem nut.

[0004] The prior art method of measuring the extension of the valve stem uses a universal dimension measuring instrument, such as a vernier caliper, and the dimension needs to be recorded after each measurement, and then compared with the standard value to determine whether it is qualified. When the number of valves to be measured is large and the specifications are different, this method requires a lot of manpower and time. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a rapid measuring device for the extension limit of a gate valve stem. The utility model is used to quickly measure and judge whether the extension of the valve stem is qualified. Measuring rulers of different lengths are used to measure the valve stems of gate valves of different specifications, which greatly shortens the measurement time.

[0006] The technical solution adopted by the utility model is as follows: a rapid measuring device for the extension limit of a gate valve stem comprises a measuring device body and a plurality of rulers distributed on the measuring device body, wherein a measuring portion for measuring the extension of the valve stem is formed between every two adjacent rulers.

[0007] The invention comprises a measuring device body and a first ruler, a second ruler, a third ruler and a fourth ruler which are distributed around the measuring device body and have different lengths. A first measuring part is formed between the first ruler and the second ruler, a second measuring part is formed between the second ruler and the third ruler, a third measuring part is formed between the third ruler and the fourth ruler, and a fourth measuring part is formed between the fourth ruler and the first ruler.

[0008] The end surfaces of the first ruler, the second ruler, the third ruler and the fourth ruler away from the measuring device body are all planes.

[0009] The first ruler is provided with a first measuring surface corresponding to the first measuring part, the second ruler is provided with a second measuring surface and a third measuring surface on both sides corresponding to the first measuring part and the second measuring part respectively, the third ruler is provided with a fourth measuring surface and a fifth measuring surface on both sides corresponding to the second measuring part and the third measuring part respectively, and the fourth ruler is provided with a sixth measuring surface and a seventh measuring surface on both sides corresponding to the third measuring part and the fourth measuring part respectively.

[0010] The first measuring plane and the second measuring plane have the same length and are perpendicular to each other, the third measuring plane and the fourth measuring plane have the same length and are perpendicular to each other, and the fifth measuring plane and the sixth measuring plane have the same length and are perpendicular to each other.

[0011] A fifth ruler extends from the angle between the fourth ruler and the first ruler, a fifth measuring part is formed between the fifth ruler and the first ruler, and an eighth measuring surface is provided on the fifth ruler corresponding to the fifth measuring part.

[0012] The first measuring surface, the second measuring surface, the third measuring surface, the fourth measuring surface, the fifth measuring surface, the sixth measuring surface, the seventh measuring surface and the eighth measuring surface are all provided with recesses.

[0013] The measuring instrument body has specifications marked on one side and dimension limits marked on the other side.

[0014] The ruler is also provided with a through hole.

[0015] The beneficial effects of the utility model are as follows: the utility model is used to quickly measure and judge whether the extension amount of the valve stem is qualified. The ruler is close to the valve stem and the end face of the ruler is against the valve stem nut, so that the valve stem is located in the measuring part. By comparing the size of the ruler with the extension limit of the valve stem, it is possible to quickly judge whether the standard value is met. Rulers of different lengths are used to measure valve stems of gate valves of different specifications, which greatly shortens the measurement time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 A schematic diagram of the structure of a rapid measuring device for the limit of extension of a gate valve stem according to the utility model;

[0018] Figure 2 It is a front view schematic diagram of the utility model with dimensions marked;

[0019] Figure 3 It is a reverse schematic diagram of the utility model with specifications marked;

[0020] Figure 4 It is a schematic diagram of measuring a qualified valve stem of the utility model;

[0021] Figure 5 A schematic diagram of measuring another qualified valve stem for the utility model;

[0022] Figure 6 It is a schematic diagram of measuring an unqualified valve stem according to the utility model;

[0023] Figure 7 It is a schematic diagram of measuring another unqualified valve stem according to the utility model;

[0024] In the figure, 1-first ruler, 2-second ruler, 3-third ruler, 4-fourth ruler, 5-first measuring part, 6-second measuring part, 7-third measuring part, 8-fourth measuring part, 9-measuring device body, 10-first measuring surface, 11-second measuring surface, 12-third measuring surface, 13-fourth measuring surface, 14-fifth measuring surface, 15-sixth measuring surface, 16-seventh measuring surface, 17-fifth ruler, 18-eighth measuring surface, 19-recess, 20-through hole, 21-fifth measuring part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0026] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0027] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0028] like Figures 1 to 7As shown, an embodiment of the utility model is a rapid measuring device for the gate valve stem extension limit, including a measuring device body 9 and a plurality of rulers distributed on the measuring device body 9, and a measuring portion for measuring the valve stem extension is formed between every two adjacent rulers.

[0029] The device is further configured to include a measuring device body 9 and a first ruler 1, a second ruler 2, a third ruler 3, and a fourth ruler 4 distributed around the measuring device body 9 and having different lengths, a first measuring portion 5 is formed between the first ruler 1 and the second ruler 2, a second measuring portion 6 is formed between the second ruler 2 and the third ruler 3, a third measuring portion 7 is formed between the third ruler 3 and the fourth ruler 4, and a fourth measuring portion 8 is formed between the fourth ruler 4 and the first ruler 1.

[0030] The beneficial effects of such a configuration are as follows: the utility model is used to quickly measure and determine whether the extension amount of the valve stem is qualified. The ruler is adjacent to the valve stem and the end face of the ruler is against the valve stem nut, so that the valve stem is located in the measuring part. By comparing the size of the ruler with the extension amount limit of the valve stem, it is possible to quickly determine whether the standard value is met. Rulers of different lengths are used to measure valve stems of gate valves of different specifications, which greatly shortens the measurement time.

[0031] It is further provided that the end surfaces of the first ruler 1 , the second ruler 2 , the third ruler 3 and the fourth ruler 4 away from the measuring device body 9 are all planes.

[0032] The beneficial effects of such a setting are as follows: the end face is used to abut against the valve stem nut, the end face is set to a plane and the plane is perpendicular to the axis of the corresponding ruler, the ruler can abut against the valve stem nut more tightly and smoothly, ensuring the accuracy of the measurement.

[0033] It is further configured that the first ruler 1 is provided with a first measuring surface 10 corresponding to the first measuring part 5, the second ruler 2 is provided with a second measuring surface 11 and a third measuring surface 12 on both sides corresponding to the first measuring part 5 and the second measuring part 6 respectively, the third ruler 3 is provided with a fourth measuring surface 13 and a fifth measuring surface 14 on both sides corresponding to the second measuring part 6 and the third measuring part 7 respectively, and the fourth ruler 4 is provided with a sixth measuring surface 15 and a seventh measuring surface 16 on both sides corresponding to the third measuring part 7 and the fourth measuring part 8 respectively.

[0034] The beneficial effect of such an arrangement is as follows: different measuring surfaces correspond to different sizes, which further facilitates the measurement of valve stems of different sizes.

[0035] It is further configured that the first measuring plane 10 and the second measuring plane 11 have the same length and are perpendicular to each other, the third measuring plane 12 and the fourth measuring plane 13 have the same length and are perpendicular to each other, and the fifth measuring plane 14 and the sixth measuring plane 15 have the same length and are perpendicular to each other.

[0036] The beneficial effects of such an arrangement are as follows: the two measuring surfaces located in the same measuring part are perpendicular to each other and have the same length; the ruler can be placed on either the left or right side of the valve stem without being blocked by other components of the gate valve; it is suitable for gate valve structures of different structures and has a wider range of applications.

[0037] It is further configured that a fifth ruler 17 extends from the angle between the fourth ruler 4 and the first ruler 1 , a fifth measuring portion 21 is formed between the fifth ruler 17 and the first ruler 1 , and an eighth measuring surface 18 is provided on the fifth ruler 17 corresponding to the fifth measuring portion 21 .

[0038] The beneficial effects of such an arrangement are as follows: there are more measuring surfaces, and the eighth measuring surface is used to measure valves with smaller specifications.

[0039] It is further provided that the first measuring surface 10 , the second measuring surface 11 , the third measuring surface 12 , the fourth measuring surface 13 , the fifth measuring surface 14 , the sixth measuring surface 15 , the seventh measuring surface 16 and the eighth measuring surface 18 are all provided with a recess 19 .

[0040] The valve stem extension limit includes the maximum extension and minimum extension of the valve stem. The maximum extension is the distance between the valve stem protruding from the valve stem nut and the top of the measuring part, and the minimum extension is the distance between the valve stem protruding from the valve stem nut and the recessed part. The minimum extension is also the minimum wear of the valve stem.

[0041] The beneficial effects of such an arrangement are as follows: whether the minimum extension of the valve stem is qualified is judged through the concave portion, and whether the maximum extension of the valve stem is qualified is judged through the entire measuring surface.

[0042] It is further provided that the measuring device body 9 has specifications marked on one side and dimension limits marked on the other side.

[0043] The beneficial effects of such an arrangement are as follows: the maximum extension and the minimum extension are marked on the front of the measuring device body, and the specification size range is marked from A to I on the back.

[0044] It is further provided that the ruler is provided with a through hole.

[0045] The beneficial effect of such a configuration is as follows: the measuring device can be conveniently carried and stored through the through hole.

[0046] In summary, the utility model of the rapid measuring device for the extension limit of the gate valve stem has the following advantages: rapid measurement and judgment, specialization, uniqueness, integration, practicality, improved work efficiency, suitable for rapid judgment of batch measurement, if the specific extension length value needs to be obtained, it can be further measured by the measuring tool.

[0047] In this embodiment, the measuring instrument is used to measure gate valves of the following specifications:

[0048] Valve specification ≤A, said ≤A includes DN15 (NPS1 / 2), DN20 (NPS3 / 4), DN32 (NPS1-1 / 4), DN40 (NPS1-1 / 2), DN50 (NPS2); the maximum extension of the valve stem of valve specification ≤A is 11.5mm, and the minimum extension of the valve stem, that is, the minimum wear, is 2.3mm;

[0049] Valve specifications B to C, including DN65 (NPS2-1 / 2), DN80 (NPS3), DN100 (NPS4), DN125 (NPS5), DN150 (NPS6); the maximum extension of the valve stem of valve specifications B to C is 16.5mm, and the minimum extension of the valve stem is 3.3mm;

[0050] Valve specifications D to E, including DN200 (NPS8), DN250 (NPS10), and DN300 (NPS12); the maximum extension of the valve stem of valve specifications D to E is 19.2 mm, and the minimum extension of the valve stem is 6.4 mm;

[0051] Valve specifications F to G, including DN350 (NPS14), DN400 (NPS16), and DN450 (NPS18); the maximum extension of the valve stem of valve specifications F to G is 29.1 mm, and the minimum extension of the valve stem is 9.7 mm;

[0052] Valve specifications H to I, wherein H to I include DN500 (NPS20) and DN600 (NPS24); the maximum extension of the valve stem of valve specifications H to I is 38.1 mm, and the minimum extension of the valve stem is 12.7 mm.

[0053] The measurable specification range of the measuring instrument can be expanded and adjusted as needed (not limited to the size specification range described in this article or the specific size values ​​indicated).

[0054] The method of using the measuring instrument of the utility model is as follows: when the gate valve is fully closed (reaching a sealing state), the measuring device is covered on the top of the valve stem in the correct direction, the outer circle of the valve stem thread is close to the side, and the top of the valve stem and the valve stem nut are observed to see whether there is a gap between the upper contour and the top of the valve stem, and it exceeds the concave part of the measuring device, which is qualified; 2) There is no gap between the upper contour and the top of the valve stem, and there is a gap between the lower contour and the top of the valve stem nut, which is unqualified; 3) There is no gap between the lower contour and the top of the valve stem nut, and it does not exceed the concave part of the measuring device, which is unqualified.

[0055] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A rapid measuring device for the gate valve stem extension limit, characterized by: The device comprises a measuring device body (9) and a plurality of measuring scales distributed on the measuring device body (9), wherein a measuring portion for measuring the extension amount of the valve stem is formed between every two adjacent measuring scales.

2. The rapid measuring device for gate valve stem extension limit according to claim 1 is characterized in that: The invention comprises a measuring device body (9) and a first measuring ruler (1), a second measuring ruler (2), a third measuring ruler (3) and a fourth measuring ruler (4) which are distributed around the measuring device body (9) and have different lengths, wherein a first measuring portion (5) is formed between the first measuring ruler (1) and the second measuring ruler (2), a second measuring portion (6) is formed between the second measuring ruler (2) and the third measuring ruler (3), a third measuring portion (7) is formed between the third measuring ruler (3) and the fourth measuring ruler (4), and a fourth measuring portion (8) is formed between the fourth measuring ruler (4) and the first measuring ruler (1).

3. The rapid measuring device for gate valve stem extension limit according to claim 2 is characterized in that: The end surfaces of the first ruler (1), the second ruler (2), the third ruler (3) and the fourth ruler (4) which are away from the measuring device body (9) are all planes.

4. The rapid measuring device for gate valve stem extension limit according to claim 2 is characterized in that: The first measuring ruler (1) is provided with a first measuring surface (10) corresponding to the first measuring part (5), the second measuring ruler (2) is provided with a second measuring surface (11) and a third measuring surface (12) on both sides corresponding to the first measuring part (5) and the second measuring part (6), the third measuring ruler (3) is provided with a fourth measuring surface (13) and a fifth measuring surface (14) on both sides corresponding to the second measuring part (6) and the third measuring part (7), and the fourth measuring ruler (4) is provided with a sixth measuring surface (15) and a seventh measuring surface (16) on both sides corresponding to the third measuring part (7) and the fourth measuring part (8).

5. The rapid measuring device for gate valve stem extension limit according to claim 4 is characterized in that: The first measuring surface (10) and the second measuring surface (11) have the same length and are perpendicular to each other, the third measuring surface (12) and the fourth measuring surface (13) have the same length and are perpendicular to each other, and the fifth measuring surface (14) and the sixth measuring surface (15) have the same length and are perpendicular to each other.

6. The rapid measuring device for gate valve stem extension limit according to claim 4 is characterized in that: A fifth measuring ruler (17) is extended at the angle between the fourth measuring ruler (4) and the first measuring ruler (1), a fifth measuring portion (21) is formed between the fifth measuring ruler (17) and the first measuring ruler (1), and an eighth measuring surface (18) is provided on the fifth measuring ruler (17) corresponding to the fifth measuring portion (21).

7. The rapid measuring device for gate valve stem extension limit according to claim 6 is characterized in that: The first measuring surface (10), the second measuring surface (11), the third measuring surface (12), the fourth measuring surface (13), the fifth measuring surface (14), the sixth measuring surface (15), the seventh measuring surface (16) and the eighth measuring surface (18) are all provided with a recess (19).

8. The rapid measuring device for gate valve stem extension limit according to claim 1 is characterized in that: The measuring device body (9) has specifications marked on one side and dimension limits marked on the other side.

9. The rapid measuring device for gate valve stem extension limit according to claim 1 is characterized in that: The ruler is also provided with a through hole (20).

Images