CN107727185B - Anti-blocking purging device for automatic control online air volume measurement - Google Patents
Anti-blocking purging device for automatic control online air volume measurement Download PDFInfo
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- CN107727185B CN107727185B CN201710913971.9A CN201710913971A CN107727185B CN 107727185 B CN107727185 B CN 107727185B CN 201710913971 A CN201710913971 A CN 201710913971A CN 107727185 B CN107727185 B CN 107727185B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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Abstract
The invention discloses a self-control online air volume measurement anti-blocking purging device, which comprises a cabinet body and is characterized in that: the locking unit is arranged on the cabinet body and comprises a rotating part and a fixing part, the rotating part is arranged outside the cabinet body, the fixing part is arranged inside the cabinet body, the other end of the rotating part is provided with a lug, and the lug is arranged on the inner side of the cabinet body and comprises a long side and a short side; when the rotating part is in an initial state, the long edge of the lug props against the fixed part, and the cabinet body is locked; and rotating the rotating piece to enable the long edge of the lug to leave the fixed piece, and opening the cabinet body. The automatic control online air volume measurement anti-blocking purging device comprises a remote control program, a field manual program and an automatic control program through a logic signal control technology, has the functions of protecting and shielding a differential pressure transmitter and signals, and is suitable for the function of measuring a higher range of medium pressure.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to an anti-blocking blowing device capable of automatically controlling online air volume measurement.
Background
The automatic control online air volume measurement anti-blocking purging device is called LSP purging device for short. The differential pressure type flowmeter is mainly used for matching with the measurement gas of the differential pressure type flowmeter, and has the function of reversely purging a pressure measurement channel of the flowmeter, preventing the blockage of dust, particles, tar, fibers and the like in a medium, widening the application range of the flowmeter and keeping the flowmeter to measure with high precision for a long time.
Such as the furnace pressure, the flue gas pressure, the flow, the coal mill air volume, the primary air volume, the secondary air volume, the TRT coal gas, the blast furnace gas, the converter gas and the like. Because the medium inevitably contains substances such as dust, tar, fiber, water vapor and the like, the flow is often influenced or even cannot be measured due to the blockage of the pressure tapping hole in the flow measurement process, and great hidden danger is caused to the production safety of boilers and blast furnaces. In the traditional method, when conditions permit, a flow meter probe is pulled out for cleaning, blowing and cleaning, all flow signals are interrupted in the cleaning process, the operation condition cannot be monitored, the difficulty is higher in the gas application occasion, and even the gas cannot be interrupted in a large-scale production enterprise for cleaning the flow meter. Many enterprises have proposed the requirement to enable on-line purging and purge control to ensure safety and production. As is known, no effective solution exists at present, and some enterprises try similar products abroad, so that the performance cannot meet the working condition for use, and the effects are not ideal and are discarded in succession. In view of this background, we have developed an LSP online purging device by making a year round from meeting the requirements of working conditions, and have achieved good results after more than two years of use.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems occurring in the conventional boilers.
Therefore, one of the purposes of the invention is to perform logic on-off control on the electromagnetic valve system through the internal program setting of the control device, and purge the pressure sampling channel of the flowmeter with compressed gas higher than the pressure in the pipeline in a short time so as to achieve the purpose of removing plugs.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an online amount of wind of automatic control is measured and is prevented stifled device that sweeps, includes the cabinet body, its characterized in that: the locking unit is arranged on the cabinet body and comprises a rotating part and a fixing part, the rotating part is arranged outside the cabinet body, the fixing part is arranged inside the cabinet body, the other end of the rotating part is provided with a lug, and the lug is arranged on the inner side of the cabinet body and comprises a long side and a short side; when the rotating part is in an initial state, the long edge of the lug props against the fixed part, and the cabinet body is locked; and rotating the rotating piece to enable the long edge of the lug to leave the fixed piece, and opening the cabinet body.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the fixing piece comprises a fixing plate and a positioning block, the fixing plate is L-shaped, one end of the fixing plate is sleeved on the rotating piece, the other end of the fixing plate is provided with a positioning hole, the positioning block penetrates through the positioning hole to be connected with the fixing plate, the middle groove of the fixing plate is also provided with a propping block, and the propping block protrudes out of the surface of the middle groove; the positioning block is arranged on the fixed plate, the first elastic piece is arranged between the positioning block and the fixed plate, one end of the first elastic piece is abutted to the fixed plate, and the other end of the first elastic piece is abutted to the protruding end of the positioning block, so that the positioning block is reset after being compressed.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: a first groove is formed in the cabinet body, and the first groove is matched with the positioning block; when the rotating part is in an initial state, the long edge of the bump props against the fixing part, so that the first groove is clamped and matched with the positioning block, and the cabinet body is locked; and rotating the rotating piece to enable the long edge of the lug to leave the fixing piece, so that the first groove is separated from the positioning block, and the cabinet body is opened.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the rotating piece also comprises a handle which is arranged on the outer side of the cabinet body, and the rotating piece is rotated through the handle; the connecting rod sets up the inboard of the cabinet body, fixed connection the handle with the lug, work as when the handle is rotatory, the connecting rod with the lug is along with the handle is rotatory.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the rotating part further comprises a fourth elastic part, the fourth elastic part is sleeved on the connecting rod, one end of the fourth elastic part is connected with the handle, and the other end of the fourth elastic part is abutted to the end face of the fixing plate.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the handle comprises a second groove, and the second groove is arranged on the outer side of the cabinet body.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the positioning unit comprises a pressing piece and a clamping piece, one end of the clamping piece is provided with a penetrating hole, the other end of the clamping piece is provided with an inclined plane, the pressing piece is sleeved on the clamping piece through the penetrating hole, and the clamping piece is matched with the second groove.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the clamping piece further comprises a square hole, a second elastic piece is arranged in the square hole, one end of the second elastic piece is connected with the end face of the inner side of the square hole, and the other end of the second elastic piece is suspended in the air; when the rotating piece is pressed downwards, the fixing piece is contacted with the clamping piece, and the abutting block is matched with the second elastic piece in the square hole.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the pressing piece comprises a baffle plate, the diameter of the baffle plate is larger than that of the penetrating hole, and the baffle plate and the handle are arranged on the same side; the spliced pole is connected baffle and reset block, and it is the round platform form, with the diameter of baffle junction be greater than with the diameter of reset block junction.
As a preferred scheme of the self-control online air volume measurement anti-blocking purging device, the device comprises the following components: the pressing piece further comprises a reset block, the diameter of the reset block is larger than that of the penetrating hole, the reset block is arranged on the other side of the clamping piece and opposite to the surface where the baffle is located, a third elastic piece is arranged at the lower end of the reset block, and the reset block is reset through the third elastic piece to drive the pressing piece to reset.
The invention has the beneficial effects that: the automatic control online air volume measurement anti-blocking purging device comprises a remote control program, a field manual program and an automatic control program through a logic signal control technology, has the functions of protecting and shielding a flow signal of a differential pressure transmitter, is suitable for measuring a higher range of medium pressure, and realizes the self-locking function by combining pressing and rotation in order to ensure the sealing property of the device. The device changes the phenomenon that the original measuring medium contains dust, tar, fiber and other substances which are easy to block the pressure tapping hole of the flowmeter.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic view of the overall structure of the cabinet body in the first embodiment provided by the automatic control online air volume measurement anti-blocking purging device of the invention;
FIG. 2 is a schematic view of the overall structure of the rotating member in the first embodiment provided by the automatic control online air volume measurement anti-blocking purging device according to the present invention;
FIG. 3 is an exploded view of the overall structure of the fixing member in the first embodiment provided by the automatic control online air volume measurement anti-blocking purging device according to the present invention;
FIG. 4 is an enlarged schematic view of a part of the interior of the cabinet body in the first embodiment provided by the automatic control online air volume measurement anti-blocking purging device of the invention;
FIG. 5 is a schematic view of the overall structure of the positioning unit in the second embodiment provided by the automatic control online air volume measurement anti-blocking purging device according to the present invention;
FIG. 6 is a schematic view of the overall structure of the pressing member in the second embodiment provided by the automatic control online air volume measurement anti-blocking purging device according to the present invention;
FIG. 7 is a schematic view of the overall structure of the clamping piece in the second embodiment provided by the automatic control online air volume measurement anti-blocking purging device of the present invention;
FIG. 8 is a schematic view of the overall structure of a second embodiment provided by the automatic control online air volume measurement anti-blocking purging device according to the present invention;
FIG. 9 is a schematic diagram of the overall structure of a second embodiment of the self-control online air volume measurement anti-blocking purging device according to the present invention;
FIG. 10 is a timing chart of the control provided by the automatic control online air volume measurement anti-clogging purging device according to the second embodiment of the present invention;
fig. 11 is a diagram of a two-way sealing solenoid valve set provided by the automatic control online air volume measurement anti-blocking purging device in the second embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Referring to fig. 1, which is a schematic view of an overall structure of a first embodiment of the self-control online air volume measurement anti-blocking purging device according to the present invention, the self-control online air volume measurement anti-blocking purging device can realize automatic program control and protection of a differential pressure transmitter, and can adapt to a function of measuring a medium pressure in a higher range.
A programmable logic control system is introduced into the automatic control online air volume measurement anti-blocking purging device, the system can freely select automatic timing purging circulation reciprocating in the range of 0-24H according to the degree of easy blocking of working conditions of media of each measuring point, a manual purging function is further arranged in the device, and when a user thinks that purging is needed, a key can be used for immediately dredging and purging. In addition, a remote control purging function is arranged in the control system, so that a control means combining automatic and manual remote control can be really realized. Because the differential pressure transmitter is adopted for conversion in flow measurement, a micro differential pressure transmitter is basically selected particularly in primary air and secondary air of flue gas due to low flow velocity and the like. The micro differential pressure transmitter does not resist the impact of high pressure gas and must be effectively protected, so the differential pressure transmitter is effectively protected in a control system and a gas circuit system. According to the structural principle, an electromagnetic valve is used in the purging gas circuit to realize control action. But the electromagnetic valve only has the function of one-way on-off. If the reverse pressure reaches 5Kpa, the electromagnetic valve can not play a sealing function. And even a tiny leakage of reverse airflow is absolutely not allowed for the differential pressure measurement, so that the measured differential pressure value and the result are influenced. In a gas circuit system, an improved pipeline mode is adopted to achieve the purpose of reverse sealing of an electromagnetic valve. The improved reverse air pressure is less than or equal to 800Kpa, and no gas leaks into the measuring tube. In practice, the reverse closed airflow leakage of foreign products cannot be realized when the pipeline pressure is more than or equal to 5 Kpa.
In this embodiment, in order to ensure the sealing performance of the cabinet a, the main body of the automatic control online air volume measurement anti-blocking purging device includes the cabinet a and the locking unit 100, the locking unit 100 is disposed on the cabinet a and includes a rotating part 101 and a fixing part 102, the rotating part 101 is disposed outside the cabinet a, and the fixing part 102 is disposed inside the cabinet a. Wherein, referring to fig. 2, the rotating member 101 includes a knob 101a, a handle 101b, a connecting rod 101c and a fourth elastic member 101d, the handle 101b is disposed at an outer side of the cabinet a, the rotating member 101 is rotated by the handle 101b, the connecting rod 101c is disposed at an inner side of the cabinet a and fixedly connects the handle 101b and the knob 101a, and when the handle 101b is rotated, the connecting rod 101c and the knob 101a are rotated along with the handle 101 b. For example: the handle 101b is rotated 90 ° at the outside of the cabinet a, and the connecting rod 101c fixedly connected to the handle 101b is rotated 90 ° therewith, and since the projection 101a is fixedly connected to the connecting rod 101c, the projection 101a is also rotated 90 ° therewith. It should be noted that the protrusion 101a includes a long side and a short side, and the long side and the short side are connected by a smooth curved surface, and the long side and the short side are perpendicular to each other, that is, if the handle 101b is in an initial state, the protrusion 101a is pressed against the fixing member 102 by the long side, and the cabinet a is locked at this time, and when the handle 101b is rotated to separate the long side of the protrusion 101a from the fixing member 102, that is, in this embodiment, the angle that the long side of the protrusion 101a needs to be rotated to separate from the fixing member 102 is 90 °, so that the cabinet a is opened when the handle 101b is rotated to. The fourth elastic element 101d is sleeved on the connecting rod 101c, and one end of the fourth elastic element is connected with the handle 101b, and the other end of the fourth elastic element abuts against the end surface of the fixing plate 102 a.
Preferably, referring to fig. 3, the fixing element 102 includes a fixing plate 102a and a positioning block 102b, the fixing plate 102a is "L" shaped, one end of the fixing plate 102a is sleeved on the connecting rod 101c of the rotating element 101, the other end of the fixing plate 102a is provided with a positioning hole 102a-1, and the positioning block 102b passes through the positioning hole 102a-1 and is connected to the fixing plate 102 a. Referring to fig. 8, the fixing plate 102a is further provided with an intermediate groove p, the intermediate groove p is centrally and symmetrically arranged on the fixing plate 102a, and an abutting block 102a-2 is further arranged on the intermediate groove p, and the abutting block 102a-2 protrudes on the surface of the intermediate groove p. A first elastic element 103 is disposed between the positioning block 102b and the fixing plate 102a, the first elastic element 103 may be a spring, and may be a mesh-shaped hollow compressible plastic, in this embodiment, the first elastic element 103 is preferably a spring. One end of the first elastic element 103 abuts against the fixing plate 102a, and the other end abuts against the protruding end of the positioning block 102b, so that the positioning block 102b can be reset after being compressed by the first elastic element 103.
Preferably, referring to fig. 4, a first groove b is formed inside the cabinet a, and the first groove b is engaged with the positioning block 102 b. For example, when the handle 101b is in the initial state, the long side of the protrusion 101a abuts against the positioning block 102b, so that the first groove b is in clamping fit with the positioning block 102b, and the cabinet a is locked at this time. When the handle 101b is rotated to a position 90 ° from the initial position, the long side of the protrusion 101a leaves the positioning block 102b, at this time, the positioning block 102b is reset by the first elastic member 103 (because the first elastic member 103 changes from the compressed state to the original state, and converts the elastic potential energy of the first elastic member into the kinetic potential energy, so that the positioning block 102b is reset), the reset positioning block 102b no longer generates a relative acting force with the protrusion 101a, so the protrusion 101a and the positioning block 102b are not in contact at this time, even after the long side of the protrusion 101a leaves the positioning block 102b, the protrusion 101a still contacts the positioning block 102b, but no acting force is generated between the protrusion 101a and the positioning block 102b, and the first groove b and the positioning block 102b will not be clamped and matched.
The invention discloses a second embodiment of an anti-blocking purging device for automatically controlling online air volume measurement, which is different from the first embodiment in that: the main body of the device further includes a positioning unit 200, and the locking unit 100 can be further locked and positioned by the positioning unit 200. In the first embodiment of the present invention, the locking unit 100 is locked by rotating the handle 101b so that the protrusion 101a and the first groove b are locked by being locked to each other, and separated by rotating the handle 101b so that the protrusion 101a and the first groove b are separated from each other. However, when locking, an external force is required to hold the handle 101b to fix its position to the original position. With respect to this drawback, the positioning unit 200 is provided in the present embodiment. Referring to fig. 5, the positioning unit 200 includes a pressing member 201 and a clip 202, and referring to fig. 7, one end of the clip 202 is provided with a penetrating hole 202a, and the other end is provided with an inclined surface s, and the pressing member 201 is sleeved on the clip 202 through the penetrating hole 202 a. In this embodiment, the handle 101b comprises a second groove 101b-2, the second groove 101b-2 is disposed on the outer side of the cabinet a, and the second groove 101b-2 is matched with the clip 202. Referring to fig. 6, the pressing member 201 includes a blocking plate 201a, a connecting post 201b and a reset block 201c, the blocking plate 201a has a diameter larger than that of the penetrating hole 202a and is disposed on the same side as the handle 101b, and the connecting post 201b connects the blocking plate 201a and the reset block 201c, and has a circular truncated cone shape, the diameter of the connection portion with the blocking plate 201a is larger than that of the connection portion with the reset block 201c, and the edge of the penetrating hole 202a is always in contact with the surface of the connecting post 201 b. The diameter of the reset block 201c is larger than that of the penetrating hole 202a, the reset block is arranged on the other side of the clamping piece 202 and opposite to the surface where the baffle plate 201a is located, the lower end of the reset block is provided with a third elastic piece 201c-1, the reset block 201c is reset through the third elastic piece 201c-1, and the pressing piece 201 is driven to reset.
Specifically, the main body of the automatic control online air volume measurement anti-blocking purging device comprises a cabinet body A, a locking unit 100 and a positioning unit 200. The locking unit 100 is disposed on the cabinet a and includes a rotating member 101 and a fixing member 102, the rotating member 101 is disposed outside the cabinet a, and the fixing member 102 is disposed inside the cabinet a. Wherein, the rotating member 101 includes a projection 101a, a handle 101b, a connecting rod 101c and a fourth elastic member 101d, the handle 101b is disposed at the outer side of the cabinet a, the rotating member 101 is rotated by the handle 101b, the connecting rod 101c is disposed at the inner side of the cabinet a and fixedly connects the handle 101b and the projection 101a, when the handle 101b is rotated, the connecting rod 101c and the projection 101a rotate along with the handle 101b, in this embodiment, the handle 101b further includes a second groove 101 b-2. It should be noted that the protrusion 101a includes a long side and a short side, and the long side and the short side are connected by a smooth curved surface, and the long side and the short side are perpendicular to each other, that is, if the handle 101b is in an initial state, the protrusion 101a is pressed against the fixing member 102 by the long side, and the cabinet a is locked at this time, and when the handle 101b is rotated to separate the long side of the protrusion 101a from the fixing member 102, that is, in this embodiment, the angle that the long side of the protrusion 101a needs to be rotated to separate from the fixing member 102 is 90 °, so that the cabinet a is opened when the handle 101b is rotated to.
Preferably, the fixing element 102 includes a fixing plate 102a and a positioning block 102b, the fixing plate 102a is "L" shaped, one end of the fixing plate 102a is sleeved on the connecting rod 101c of the rotating element 101, the other end of the fixing plate 102a is provided with a positioning hole 102a-1, and the positioning block 102b passes through the positioning hole 102a-1 and is connected with the fixing plate 102 a. The fixing plate 102a is further provided with an intermediate groove p, the intermediate groove p is arranged in the center of the fixing plate 102a and is centrosymmetric, the intermediate groove p is further provided with a propping block 102a-2, and the propping block 102a-2 protrudes from the surface of the intermediate groove p. A first elastic element 103 is disposed between the positioning block 102b and the fixing plate 102a, the first elastic element 103 may be a spring, and may be a mesh-shaped hollow compressible plastic, in this embodiment, the first elastic element 103 is preferably a spring. One end of the first elastic element 103 abuts against the fixing plate 102a, and the other end abuts against the protruding end of the positioning block 102b, so that the positioning block 102b can be reset after being compressed by the first elastic element 103.
Preferably, a first groove b is formed in the cabinet body a, and the first groove b is matched with the positioning block 102 b. For example, when the handle 101b is in the initial state, the long side of the protrusion 101a abuts against the positioning block 102b, so that the first groove b is in clamping fit with the positioning block 102b, and the cabinet a is locked at this time. When the handle 101b is rotated to a position 90 ° from the initial position, the long side of the protrusion 101a leaves the positioning block 102b, at this time, the positioning block 102b is reset by the first elastic member 103 (because the first elastic member 103 changes from the compressed state to the original state, and converts the elastic potential energy of the first elastic member into the kinetic potential energy, so that the positioning block 102b is reset), the reset positioning block 102b no longer generates a relative acting force with the protrusion 101a, so the protrusion 101a and the positioning block 102b are not in contact at this time, even after the long side of the protrusion 101a leaves the positioning block 102b, the protrusion 101a still contacts the positioning block 102b, but no acting force is generated between the protrusion 101a and the positioning block 102b, and the first groove b and the positioning block 102b will not be clamped and matched.
The positioning unit 200 comprises a pressing piece 201 and a clamping piece 202, wherein one end of the clamping piece 202 is provided with a penetrating hole 202a, the other end of the clamping piece 202 is provided with an inclined surface s, the pressing piece 201 is sleeved on the clamping piece 202 through the penetrating hole 202a, and the clamping piece 202 is matched with the second groove 101 b-2. The pressing piece 201 comprises a baffle 201a, a connecting column 201b and a reset block 201c, the diameter of the baffle 201a is larger than that of the penetrating hole 202a and is arranged on the same side of the handle 101b, the connecting column 201b is connected with the baffle 201a and the reset block 201c and is in a circular truncated cone shape, the diameter of the joint of the connecting column 201a and the diameter of the joint of the reset block 201c are larger than that of the joint of the connecting column 201a, and the edge of the penetrating hole 202a is always kept in contact with the surface of the connecting column 201 b. The diameter of the reset block 201c is larger than that of the penetrating hole 202a, the reset block is arranged on the other side of the clamping piece 202 and opposite to the surface where the baffle plate 201a is located, the lower end of the reset block is provided with a third elastic piece 201c-1, the reset block 201c is reset through the third elastic piece 201c-1, and the pressing piece 201 is driven to reset.
In this embodiment, in the original state, the clip 202 is engaged with the second groove 101b-2, and the handle 101b is in the initial state (i.e. vertical state), the long side of the protrusion 101a abuts against the positioning block 102b, so that the first groove b is engaged with the positioning block 102b, and the cabinet a is locked. The pressing piece 201 is pressed down, the connecting column 201b moves downwards in the penetrating hole 202a, the connecting column 201b is larger in diameter when moving downwards, the clamping piece 202 is driven to move downwards, the clamping piece 202 is not matched with the second groove 101b-2 any more, the clamping piece 202 falls off from the second groove 101b-2, the handle 101b is bounced up due to the fourth elastic piece 101d, and after the pressing piece 201 is pressed down, the handle is immediately reset under the driving of the third elastic piece 201 c-1. After the handle 101b is popped out, when the handle 101b is rotated to a position 90 degrees relative to the initial position, the long edge of the bump 101a leaves the positioning block 102b, at this time, the positioning block 102b is reset due to the first elastic piece 103, the reset positioning block 102b does not generate a relative acting force with the bump 101a, so that the first groove b and the positioning block 102b cannot be clamped and matched with each other, and the cabinet body A is unlocked.
The clip member 202 further comprises a square hole 202b, and a second elastic member 202b-1 is disposed in the square hole 202b, in which the second elastic member 202b-1 can be a spring or a pressing member with elasticity, and the pressing member with elasticity is preferred. One end of the second elastic element 202b-1 is connected to the inner end surface of the square hole 202b, and the other end is suspended.
When the cabinet body a needs to be locked again, the handle 101b is rotated to return to the initial position, namely, the vertical state, the handle 101b is pressed down, at this time, the fixing piece 102 is in contact with the clamping piece 202, and before the resisting block 102a-2 and the square hole 202b are mutually matched, the clamping piece 202 is driven to slightly move downwards, so that the handle 101b is convenient to press down. The handle 101b moves downwards along the inclined surface s of the clamping piece 202 until the clamping piece 202 is clamped in the second groove 101b-2, the abutting block 101b-1 is matched with the square hole 202b, and the cabinet body A is closed and locked.
The device changes the phenomenon that the original measuring medium contains dust, tar, fiber and other substances which are easy to block the flowmeter. For example, when measuring a DRT gas pipeline in a certain steel mill, the flowmeter needs to be manually disassembled to clean the blockage of the pressure tapping hole for about 15-20 days, so that the operation has safety risk and large workload, the cleaning process generally takes about 2 hours, and the measured gas flow can only be interrupted during cleaning, thereby causing data incompleteness. After the automatic control online wind pressure measurement anti-blocking purging device is used, the DRT pipeline is operated for nearly two years, and the phenomenon of blocking and pressure tapping can not be found, so that the safety measurement performance is improved, the manual cleaning work is avoided, the measurement is continuous and uninterrupted, the flowmeter keeps high-precision measurement for a long time, the application range of the flowmeter is widened, and better economic benefit is obtained.
Referring to the schematic diagram shown in fig. 9 and the action timing diagram of the purge solenoid valve shown in fig. 10, the automatic control online air volume measurement anti-blocking purge device performs logic signal processing on-off control on the solenoid valve system through the internal program setting of the purge controller, and purges the high-low pressure sampling channel of the flow meter probe by using compressed gas with pressure higher than the pipeline pressure in a short time, so as to achieve the purpose of removing the blockage.
Preferably, referring to fig. 10, the logic signal control technology of the automatic control online air volume measurement anti-blocking purging device (LSP) further comprises a remote control program, a field manual program, and an automatic control program, and the controller is used for adjusting the time and sequence of the programming and controlling the electromagnetic valve program, and integrating the field manual control and the remote control.
As a preferable scheme, referring to FIG. 11, the invention improves the design pipeline to enable the electromagnetic valve to have the function of sealing against reverse air pressure, but the electromagnetic valve can not be sealed against reverse air pressure due to the product structure, and the bidirectional air pressure of the electromagnetic valve is effectively sealed by additionally arranging the one-way check part. Referring to fig. 11, the two-way sealing solenoid valve set includes a solenoid valve 301 and a check valve 302, wherein a micro differential pressure signal on the solenoid valve is transmitted to the solenoid valve, high-pressure gas in the check valve is transmitted downwards, and the interior of the solenoid valve is transmitted upwards, so that the two-way air pressure sealing of the solenoid valve is realized.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (5)
1. The utility model provides an online amount of wind of automatic control is measured and is prevented stifled device that sweeps, includes cabinet body (A), its characterized in that: the cabinet body (A) is internally provided with a remote control unit, a manual adjusting unit, an automatic control unit and a two-way sealing electromagnetic valve bank which are connected with an air path through a control unit, the two-way sealing electromagnetic valve bank comprises an electromagnetic valve (301) and a check valve (302), the check valve (302) is a one-way check piece for sealing the two-way air pressure of the electromagnetic valve (301), and the control unit can adjust according to the plugging degree of working condition media of each measuring point;
the locking device is characterized by further comprising a locking unit (100) which is arranged on the cabinet body (A) and comprises a rotating piece (101) and a fixing piece (102), wherein the rotating piece (101) is arranged outside the cabinet body (A), the fixing piece (102) is arranged inside the cabinet body (A), a convex block (101 a) is arranged at the other end of the rotating piece (101), and the convex block (101 a) is arranged on the inner side of the cabinet body (A) and comprises long sides and short sides which are connected through a smooth curved surface and are perpendicular to each other;
when the rotating piece (101) is in an initial state, the long edge of the bump (101 a) props against the fixed piece (102), and the cabinet body (A) is locked; rotating the rotating member (101) so that the long side of the lug (101 a) leaves the fixed member (102), the cabinet (A) being opened;
the fixing part (102) comprises a fixing plate (102 a) and a positioning block (102 b), the fixing plate (102 a) is L-shaped, one end of the fixing plate is sleeved on the rotating part (101), the other end of the fixing plate is provided with a positioning hole (102 a-1), the positioning block (102 b) penetrates through the positioning hole (102 a-1) to be connected with the fixing plate (102 a), a propping block (102 a-2) is further arranged on a middle groove of the fixing plate (102 a), and the propping block (102 a-2) protrudes out of the surface of the middle groove;
a first elastic element (103) is arranged between the positioning block (102 b) and the fixing plate (102 a), one end of the first elastic element (103) is abutted against the fixing plate (102 a), and the other end of the first elastic element is abutted against the protruding end of the positioning block (102 b), so that the positioning block (102 b) is reset after being compressed;
a first groove (b) is formed in the cabinet body (A), and the first groove (b) is matched with the positioning block (102 b);
when the rotating piece (101) is in an initial state, the long edge of the bump (101 a) props against the fixing piece (102), so that the first groove (b) is clamped and matched with the positioning block (102 b), and the cabinet body (A) is locked; rotating the rotating member (101) to enable the long edge of the lug (101 a) to leave the fixed member (102), enabling the first groove (b) to be separated from the positioning block (102 b), and opening the cabinet body (A);
the rotating member (101) further comprises,
a handle (101 b) provided outside the cabinet body (A), the rotating member (101) being rotated by the handle (101 b);
the connecting rod (101 c) is arranged on the inner side of the cabinet body (A) and fixedly connected with the handle (101 b) and the lug boss (101 a), and when the handle (101 b) rotates, the connecting rod (101 c) and the lug boss (101 a) rotate along with the handle (101 b);
the rotating part (101) further comprises a fourth elastic part (101 d) sleeved on the connecting rod (101 c), one end of the fourth elastic part is connected with the handle (101 b), and the other end of the fourth elastic part abuts against the end face of the fixing plate (102 a).
2. The automatic control online air volume measurement anti-blocking purging device as claimed in claim 1, characterized in that: the handle (101 b) comprises a second groove (101 b-2), and the second groove (101 b-2) is arranged on the outer side of the cabinet body (A).
3. The automatic control online air volume measurement anti-blocking purging device as claimed in claim 2, characterized in that: the positioning unit (200) comprises a pressing piece (201) and a clamping piece (202), one end of the clamping piece (202) is provided with a penetrating hole (202 a), the other end of the clamping piece is provided with an inclined surface(s), the pressing piece (201) is sleeved on the clamping piece (202) through the penetrating hole (202 a), and the clamping piece (202) is matched with the second groove (101 b-2).
4. The automatic control online air volume measurement anti-blocking purging device as claimed in claim 3, characterized in that: the clamping piece (202) further comprises a square hole (202 b), a second elastic piece (202 b-1) is arranged in the square hole (202 b), one end of the second elastic piece (202 b-1) is connected with the end face of the inner side of the square hole (202 b), and the other end of the second elastic piece is arranged in a suspended mode;
when the rotating piece (101) is pressed down, the fixed piece (102) is contacted with the clamping piece (202), and the abutting block (102 a-2) is matched with the second elastic piece (202 b-1) in the square hole (202 b).
5. The automatic control online air volume measurement anti-blocking purging device as claimed in claim 4, characterized in that: the pressing piece (201) comprises a pressing piece,
a baffle (201 a) having a diameter greater than the diameter of the through hole (202 a) on the same side as the handle (101 b);
spliced pole (201 b), connect baffle (201 a) and reset block (201 c), it is the round platform form, with the diameter of baffle (201 a) junction be greater than with the diameter of reset block (201 c) junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710913971.9A CN107727185B (en) | 2017-09-30 | 2017-09-30 | Anti-blocking purging device for automatic control online air volume measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710913971.9A CN107727185B (en) | 2017-09-30 | 2017-09-30 | Anti-blocking purging device for automatic control online air volume measurement |
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| Publication Number | Publication Date |
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| CN107727185A CN107727185A (en) | 2018-02-23 |
| CN107727185B true CN107727185B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710913971.9A Active CN107727185B (en) | 2017-09-30 | 2017-09-30 | Anti-blocking purging device for automatic control online air volume measurement |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110031056A (en) * | 2019-04-24 | 2019-07-19 | 淮安赛希尔自动化仪表有限公司 | A kind of connection PLC (DCS) returns the anti-blocking timing blow device of flowmeter of feedback interlocking signal automatically |
| CN110079644A (en) * | 2019-06-11 | 2019-08-02 | 山东钢铁股份有限公司 | A kind of ladle purging control system |
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| CN201924703U (en) * | 2010-12-28 | 2011-08-10 | 宁波生久柜锁有限公司 | Prizing and scratching preventive planar lock |
| CN202041249U (en) * | 2011-03-02 | 2011-11-16 | 蔡玮凤 | Intelligent full-automatic reverse-blowing anti-blocking detection device |
| CN203947893U (en) * | 2014-06-30 | 2014-11-19 | 宁波永发集团有限公司 | A kind of electromagnetic lock |
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| CN203961669U (en) * | 2014-06-05 | 2014-11-26 | 长治市唯美装饰工程有限公司 | Indoor sliding door is opened locking simple mechanism |
| KR101516121B1 (en) * | 2014-06-05 | 2015-05-04 | 김정규 | That prefabricated frame structure improve connection rod and cylinder and bevel gear of digital door lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201924703U (en) * | 2010-12-28 | 2011-08-10 | 宁波生久柜锁有限公司 | Prizing and scratching preventive planar lock |
| CN202041249U (en) * | 2011-03-02 | 2011-11-16 | 蔡玮凤 | Intelligent full-automatic reverse-blowing anti-blocking detection device |
| CN203947893U (en) * | 2014-06-30 | 2014-11-19 | 宁波永发集团有限公司 | A kind of electromagnetic lock |
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| CN107727185A (en) | 2018-02-23 |
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