CN111664817A - Gas chamber, and system and method for measuring horizontal clearance between piston and side plate - Google Patents

Abstract

The invention relates to a gas tank, a measuring system and a method for measuring the horizontal gap between a piston and a side plate, and belongs to the technical field of gas storage engineering. The device includes several horizontal distance measuring units evenly distributed on the semi-circle of the piston; the horizontal distance measuring device measures the horizontal distance between the piston and the side plate of the cylinder and sends the data of the horizontal distance to the control center of the gas tank, and measures the inclination of the piston. The device measures the inclination of the piston relative to the horizontal plane and sends the inclination data to the control center of the gas tank. The control center judges the influence of the inclination on the horizontal spacing, and compares the horizontal spacing after deducting the influence of the inclination with the standard spacing. When the standard distance is reached, the control center will send out an alarm signal. The invention reduces the investment cost and maintenance workload of the gas tank.

Description

A gas tank and measuring system and measuring method for horizontal gap between piston and side plate

technical field

The invention belongs to the technical field of gas storage engineering, and relates to a gas cabinet, a measuring system and a measuring method for the horizontal gap between a piston and a side plate.

Background technique

Membrane-sealed gas cabinets, commonly known as PRC-type dry gas cabinets, Wiggins cabinets or film cabinets, membrane-sealed gas cabinets use the side plate of the cylinder in the middle and lower parts to seal the gas, and the upper part is fixed between the side plate and the piston. It is a kind of piston type dry gas tank with rubber membrane sealing gas. According to the number of piston sealing membrane segments, its piston can be divided into one-segment type and multi-segment type piston. Taking a one-stage membrane-sealed gas tank with a cabinet capacity of 135,000 m ³ and a gas storage pressure of 8 kPa as an example, the diameter of the side plate of the cylinder and the outside of the piston retainer is about 60m, the height of the side plate is about 70m, and the piston retainer is more than 20m high. The mass of the piston is about 2200t, and it is a huge power equipment made on site.

The distance between the gas tank piston and the side plate is an important parameter in the operation of the gas tank, which affects the safe and stable operation of the gas tank. Once the eccentric operation of the piston exceeds the set value (generally designed value ±120mm), if it is not found in time to effectively control or stop the operation, the huge mass of the piston may hit the gas cabinet cylinder, resulting in damage to the sealing rubber mold and leakage of gas until the piston tilts aggravation, falling, etc., resulting in major safety accidents.

In the prior art, a plurality of radar position detectors are evenly distributed on the upper annular platform of the one-stage membrane-sealed gas tank piston stop frame or the upper annular platform of the two-stage membrane-sealed gas tank stop frame along the circumference concentric with the piston. Measure the horizontal distance between the piston and the side plate of the cylinder to prevent the eccentricity of the piston. However, this arrangement requires a large number of radar position detectors, and the investment cost is high, and the subsequent maintenance workload is also increased.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present application is to provide a gas tank and a measuring system and method for the horizontal gap between the piston and the side plate, which not only reduces the initial investment cost of the gas tank, but also reduces the subsequent maintenance workload.

To achieve the above object, the present invention provides the following technical solutions:

A system for measuring the horizontal gap between the piston and the side plate of a gas tank, comprising a horizontal distance measuring device and a piston inclination measuring device connected with the control center of the gas tank, characterized in that: the horizontal distance measuring device comprises a Several horizontal distance measuring units on the semicircle; the horizontal distance measuring device measures the horizontal distance between the piston and the side plate of the cylinder and sends the data of the horizontal distance to the control center of the gas tank, and the piston inclination measuring device measures The inclination of the piston and the inclination data are sent to the control center of the gas tank. The control center judges the influence of the inclination on the horizontal spacing, and compares the horizontal spacing after deducting the influence of the inclination with the standard spacing. When the standard spacing is exceeded, the control center Send an alarm signal.

Optionally, the piston inclination measuring device includes a plurality of piston inclination measurement components disposed on the piston, the piston inclination measurement components are distributed on a concentric circle concentric with the piston and close to the inner side of the gas cabinet cylinder, the piston inclination measurement The assembly includes two piston inclination measuring units arranged symmetrically with respect to the axis of the piston.

Optionally, the horizontal distance measuring unit and the piston inclination measuring unit are located on the same radial plane of the piston.

Optionally, the horizontal distance measuring unit is half of the number of the piston inclination measuring units.

Optionally, the piston inclination measuring device is fixed on the piston stopper or on the piston plate close to the inner side of the piston stopper.

Optionally, the horizontal distance measuring device is an explosion-proof ultrasonic distance meter.

Optionally, the horizontal distance measuring device is an explosion-proof ultrasonic range finder with wireless transmission function.

Optionally, the horizontal distance measuring device is arranged in the circumferential direction of the gas cabinet to avoid the steel wire rope of the leveling device, the side panel manhole and the side panel ventilation hole.

A gas cabinet is applied with the above-mentioned measuring system for the horizontal gap between the piston and the side plate.

A method for measuring the horizontal gap between a piston and a side plate of a gas cabinet, comprising the following steps: a horizontal distance measuring device is arranged on the piston, and the horizontal distance measuring device comprises a plurality of horizontal distance measuring units evenly distributed on the semicircle of the piston stop; There is a piston inclination measuring device on the baffle or on the piston plate close to the inner side of the piston baffle; the horizontal distance measuring device measures the horizontal distance between the piston and the side plate of the cylinder and sends the data of the horizontal distance to the control center of the gas tank , the piston inclination measuring device measures the inclination of the piston and sends the inclination data to the control center of the gas tank; the control center judges the influence of the inclination on the horizontal spacing, and compares the horizontal spacing after deducting the influence of the inclination with the standard spacing, when When the standard distance is exceeded, the control center sends out an alarm signal.

Optionally, the piston inclination measuring device includes a plurality of piston inclination measurement assemblies arranged on the same circumference concentric with the piston, and the piston inclination measurement assembly includes two piston inclination measurement units arranged symmetrically about the axis of the piston; The horizontal distance measurement unit is half of the number of the piston inclination measurement units, and the horizontal distance measurement unit and the piston inclination measurement unit are located on the same radial plane of the piston.

The beneficial effects of the present invention are:

1. The horizontal distance measuring device of the present invention adopts a semicircular arrangement, which reduces the general horizontal distance measuring unit compared to the full circumference arrangement in the prior art, which not only reduces the initial investment cost of the gas tank, but also reduces the follow-up maintenance work. quantity.

2. The present invention selects an explosion-proof ultrasonic range finder with wireless transmission function, which not only reduces the maintenance workload caused by cable transmission, but also avoids the installation of a complicated wire take-up reel on the top of the gas cabinet, reducing the measurement cost. cost of the device.

Other advantages, objects, and features of the present invention will be set forth in the description that follows, and will be apparent to those skilled in the art based on a study of the following, to the extent that is taught in the practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the following description.

Description of drawings

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be preferably described in detail below with reference to the accompanying drawings, wherein:

Fig. 1 is the structural representation of a kind of membrane-sealed gas tank of the present invention;

2 is a plan view of the horizontal distance measuring device and the piston inclination measuring device of Embodiment 1;

FIG. 3 is a plan view of the horizontal distance measuring device and the piston inclination measuring device of Embodiment 2. FIG.

Reference numerals: cylinder 1, side plate 101, side plate ventilation hole 102, side plate manhole 103, piston leveling device 104, piston 2, piston plate 201, piston inclination measuring device 202, piston stopper 203, piston stopper The rack top platform 204 , the horizontal distance measuring device 205 , and the rubber sealing film 3 .

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be construed as limitations of the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation of the present invention. situation to understand the specific meaning of the above terms.

Please refer to FIGS. 1 to 3 , a system for measuring the horizontal gap between the piston and the side plate of a gas tank includes a horizontal spacing measuring device 205 and a piston inclination measuring device 202 connected to the control center of the gas tank; the horizontal spacing measuring device 205 includes a uniform distribution There are several horizontal distance measuring units on the half circumference of the piston stopper 203, and the horizontal distance measuring device 205 avoids the wire rope of the piston leveling device 104 and the side plate man on the side plate 101 of the cylinder body in the circumferential direction of the gas tank. The holes 103 and the side plate ventilation holes 102 are provided; the horizontal distance measuring device 205 measures the horizontal distance between the piston 2 and the side plate 101 of the cylinder 1 and sends the data of the horizontal distance to the control center of the gas tank, and the piston inclination measuring device 202 Measure the inclination of piston 2 and send the inclination data to the control center of the gas tank. The control center judges the influence of the inclination on the horizontal spacing, and compares the horizontal spacing after deducting the influence of the inclination with the standard spacing. The control center sends out an alarm signal.

In order to improve the sensitivity of measurement and facilitate the arrangement, the piston inclination measuring device 202 of the present invention is fixed on the piston stopper 203 or on the piston plate close to the inner side of the piston stopper 203; The piston inclination measurement assembly on the circumference, the piston inclination measurement assembly includes two piston inclination measurement units arranged symmetrically about the axis of the piston; preferably, the horizontal distance measurement unit is half of the number of the piston inclination measurement units, arranged on the circumference, along the piston The radial and horizontal distance measuring unit of 2 is arranged on the top platform 204 of the piston stopper, and the horizontal distance measuring unit and the piston inclination measuring unit are located on the same radial plane of the piston 2 .

Preferably, the horizontal distance measuring unit is an explosion-proof ultrasonic distance meter.

In order to reduce the maintenance cost, the horizontal distance measuring device 205 of the present invention selects an explosion-proof ultrasonic distance meter with wireless transmission function; it not only reduces the maintenance workload caused by cable transmission, but also avoids setting the structure on the top of the gas cabinet The complex take-up reel simplifies the measuring device of the gas tank.

Preferably, the distance between the horizontal distance measuring device 205 and the outer edge of the piston stopper 203 is equal to the distance between the side plate 101 of the cylinder 1 and the outer edge of the piston stopper 203 .

In FIG. 1, D1 is the diameter of the inner wall of the gas holder side plate 101; D2 is the outer diameter of the piston stopper 203 supporting the rubber membrane 3 in operation; W is the distance between the outer edge of the piston stopper 203 and the side plate 101; H1 is the piston stroke; H2 is the height of the piston block; a is the air area; g is the gas area.

A gas tank includes a measuring system for measuring the horizontal gap between the piston and the side plate, and the measuring system applies the above-mentioned measuring system for the horizontal gap between the piston and the side plate of the gas tank.

A method for measuring the horizontal gap between a piston and a side plate of a gas tank, comprising the following steps: a horizontal distance measuring device 205 is arranged on the piston 2, and the horizontal distance measuring device 205 includes a plurality of horizontal distance measuring devices evenly distributed on the semicircle of the piston stopper 203 A piston inclination measuring device 202 is provided on the upper side of the piston stopper 203 or on the piston plate close to the inner side of the piston stopper 203; the horizontal distance measuring device 205 measures the horizontal distance between the piston 2 and the side plate 101 of the cylinder 1 and The data of the horizontal spacing is sent to the control center of the gas tank, and the piston inclination measuring device 202 measures the inclination of the piston 2 and sends the inclination data to the control center of the gas tank; the control center judges the influence of the inclination on the horizontal spacing, and calculates the The horizontal spacing after deducting the influence of the inclination is compared with the standard spacing, and the control center will issue an alarm signal when the standard spacing is exceeded.

Preferably, the piston inclination measurement device 202 includes a plurality of piston inclination measurement assemblies arranged on the same circumference concentric with the piston 2, and the piston inclination measurement assembly includes two piston inclination measurement units arranged symmetrically about the axis of the piston; the horizontal distance measurement unit Arranged on half of the circumference of the piston inclination measuring device, the horizontal distance measuring unit is located on the top platform 204 of the piston baffle, and the horizontal distance measuring unit and the piston inclination measuring unit are located on the same radial plane of the piston 2 .

Example 1

A membrane-sealed gas tank, referring to FIGS. 1 to 2, includes a cylinder body 1 and a piston 2 that is arranged in the cylinder body 1 to move up and down, as well as a horizontal distance measuring device 205 and a piston inclination measuring device connected to the control center of the gas tank 202, the piston 2 includes a piston body and a piston stopper 203 arranged in the circumferential direction of the piston body; the piston inclination measuring device 202 includes 6 piston inclination measuring units that are evenly distributed relative to the center of the cylinder, and are arranged on the upper side of the piston body near the One side of the piston stopper 203 is fixed on the periphery of the piston plate 201 of the piston body; the horizontal distance measuring device 205 includes three horizontal distance measuring units evenly distributed on the semicircle, arranged on the piston stopper of the two-stage piston The upper side or the upper side of the piston stopper of the one-stage piston is located on the upper side of the top platform 204 of the piston stopper; when the horizontal distance measuring device 205 is arranged on the top platform of the piston stopper 203, it should avoid the steel wire rope of the leveling device 104, Side plate ventilation holes 102 and side plate manholes 103; the detection signals of the piston inclination measuring device 202 and the horizontal distance measuring device 205 are sent to the control center for display. After eliminating the influence of the piston inclination and comparing with the set standard distance, when When the standard distance is exceeded, the control center will issue an alarm signal to alarm.

The piston 2 of the membrane-sealed gas tank moves vertically up and down in the gas tank body 1 to realize gas absorption and delivery. The determination of the piston inclination is realized by calculating the deviation by using the pressure difference of the liquid communication pipe or the measuring point of the piston height evenly and symmetrically arranged in the circumferential direction of the gas tank. Since the sum of the distances of the diagonal positions when the piston 2 is not tilted is substantially constant, when the piston stopper 203 is as high as 20 m, and the inclination of the piston is 1‰, the outer edge of the piston stopper 203 and the side plate 101 The gap between them is 20mm. Therefore, after eliminating the influence of the piston tilt, the operator can observe and determine the actual distance between the piston and the side plate 101 of the gas tank cylinder 1 in the horizontal direction, and determine whether the clearance between the piston 2 and the side plate 101 exceeds the standard.

The horizontal distance W between the piston 2 and the side plate 101 is guaranteed to be within the set value by multiple full-stroke reciprocating operations during commissioning before the gas tank is put into production. Therefore, the horizontal distance measuring device 205 can be used to detect the horizontal distance of the piston 2 when it is running up and down by adopting a half-circle arrangement. Eccentric operation. The measurement data signal of the distance between the piston in the horizontal direction and the side plate 101 of the gas holder cylinder 1 is transmitted to the manned place for display. Combined with the piston inclination measurement data, operation and maintenance personnel can remotely monitor the operating conditions of the gas tank, a giant field device. Therefore, the horizontal distance measuring device 205 is arranged in a semicircle, which not only achieves the purpose of monitoring the change of the distance between the piston 2 and the side plate 101, but also saves investment and maintenance costs.

The installation position of the horizontal distance measuring device 205 should avoid the interference of the rubber sealing film 3. When the distance between the outer side of the piston stopper 203 and the side plate 101 is 500mm, the distance between the horizontal distance measuring device 205 and the side plate 101 can be set to 1000mm. The measurement accuracy is required to be at the millimeter level. Under this working condition, the selection of explosion-proof ultrasonic rangefinder can already meet the requirements. Based on the configuration of conventional wired transmission type explosion-proof ultrasonic rangefinders, it is estimated that in this embodiment, one gas cabinet can save about 80,000 yuan in investment by reducing 3 conventional explosion-proof ultrasonic rangefinders than using 6 explosion-proof ultrasonic rangefinders. In the case of using radar range finder or range finder using wireless transmission equipment, etc., the investment savings will be even higher.

The mass of the piston of the gas tank is generally several hundred tons or even several thousand tons. After the gas tank is debugged, the eccentric operation of the piston is generally accumulated due to the elongation of the wire rope of the piston leveling device 104. Therefore, the piston 2 and the side plate The horizontal distance measurement of 101 can be performed intermittently. If wireless transmission technology is used to transmit the measurement data of the horizontal distance between the piston 2 and the side plate 101 to the outside of the gas cabinet, the number of cables falling from the top of the gas cabinet to the piston 2 will be reduced, and the number of cables will be reduced. There is no need for a take-up reel, and there is no need to consider the problem of cable wear; in addition, since the horizontal distance between the piston 2 and the side plate 101 can be intermittently measured and monitored, the power consumption is small, so the horizontal distance measuring device 205 can preferably use wireless transmission technology, so that The battery can be used for power supply to prevent the cables from falling freely from the top of the cabinet, and the complex structure of the cable take-up reel can be set up, and the long-term wear and tear of the cables can be avoided to cause accidents. The battery is replaced by the staff during regular inspections.

Example 2

A membrane-sealed gas tank, referring to FIG. 3, is different from Embodiment 1 in that the piston inclination measuring device 202 of this embodiment includes four piston inclination measuring units evenly distributed relative to the center of the cylinder, and the horizontal distance measuring device 205 includes 2 horizontal distance measuring units evenly distributed on the semicircle.

The invention can timely warn the eccentric overrun of the gas tank piston 2, ensure the safe operation of the gas tank, and realize the long-term safe and stable operation of the membrane-sealed gas tank. The invention is applicable to both one-segment and multi-segment piston membrane-sealed gas cabinets, and can also be applied to other types of gas cabinets that need to monitor the horizontal distance between the vertically ascending piston and the side plate.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should all be included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a gas chamber piston and curb plate horizontal clearance measurement system, includes horizontal interval measuring device and piston slope measuring device that link to each other with the control center of gas chamber, its characterized in that: the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of the piston baffle frame; the piston inclination measuring device measures the inclination of the piston and sends inclination data to the control center of the gas tank, the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with a standard distance after the influence of the inclination is deducted, and sends an alarm signal when the horizontal distance exceeds the standard distance.

2. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the piston inclination measuring device comprises a plurality of piston inclination measuring assemblies arranged on the piston, the piston inclination measuring assemblies are distributed on a concentric circle which is concentric with the piston and close to the inner side of the cylinder body of the gas chamber, and the piston inclination measuring assemblies comprise two piston inclination measuring units symmetrically arranged about the axis of the piston.

3. The system of claim 2, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston.

4. The system of claim 2, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the piston inclination measuring device is fixed on the piston baffle frame or a piston plate close to the inner side of the piston baffle frame.

5. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring device is an explosion-proof ultrasonic distance meter.

6. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring device is an explosion-proof ultrasonic distance meter with a wireless transmission function.

7. The system of claim 1, wherein the gas holder piston and side plate horizontal clearance measurement system comprises: the horizontal distance measuring device avoids the arrangement of a steel wire rope of the leveling device, a manhole of the side plate and a vent hole of the side plate in the circumferential direction of the gas chamber.

8. A gas holder, characterized in that: use of a piston to side plate horizontal clearance measurement system according to any of claims 1 to 7.

9. A method for measuring the horizontal clearance between a piston and a side plate of a gas chamber is characterized by comprising the following steps: a piston is provided with a horizontal distance measuring device, the horizontal distance measuring device comprises a plurality of horizontal distance measuring units which are uniformly distributed on the semi-circumference of a piston blocking frame, and a piston inclination measuring device is arranged on the piston blocking frame or a piston plate which is close to the inner side of the piston blocking frame; the piston inclination measuring device measures the inclination of the piston and sends the inclination data to the control center of the gas tank; and the control center judges the influence of the inclination on the horizontal distance, compares the horizontal distance with the standard distance after deducting the influence of the inclination, and sends out an alarm signal when the horizontal distance exceeds the standard distance.

10. The method of claim 9, wherein the method comprises the following steps: the piston inclination measuring device comprises a plurality of piston inclination measuring assemblies which are arranged on the same circumference concentric with the piston, and each piston inclination measuring assembly comprises two piston inclination measuring units which are symmetrically arranged about the axis of the piston; the horizontal distance measuring unit is half of the number of the piston inclination measuring units, and the horizontal distance measuring unit and the piston inclination measuring unit are positioned on the same radial surface of the piston.

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