Self-cleaning gas turbine flowmeter

Abstract

The utility model provides a self-cleaning gas turbine flowmeter which comprises a shell, a filtering unit and a cleaning unit, and a turbine, a spray head and a liquid outlet are arranged in the shell. The filtering unit comprises a mounting seat and a filtering insertion plate, and a filtering net is arranged on the filtering insertion plate; the cleaning unit comprises a liquid injection cylinder, a piston push rod and a liquid supplementing cylinder, the liquid injection cylinder is connected to the peripheral wall of the shell, the liquid injection cylinder is provided with a liquid injection cavity, the piston push rod is in sliding fit with the liquid injection cavity, and the liquid supplementing cylinder communicates with the liquid injection cavity and is used for adding cleaning liquid into the liquid injection cavity; the spray head communicates with the liquid injection cavity, and the piston push rod is used for pushing the cleaning liquid to the spray head to flush the turbine. According to the self-cleaning gas turbine flowmeter, impurities in gas can be effectively removed through the filter screen, and the impurities are prevented from interfering with normal rotation of the turbine; the turbine is cleaned regularly through the cleaning unit, the situation that the sensitivity of the turbine is reduced due to accumulation of pollutants on the surface of the turbine is prevented, and then the measuring precision and the service life of the flowmeter are effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of gas flow measurement technology, specifically relating to a self-cleaning gas turbine flow meter. Background Technology

[0002] Gas turbine flow meters are widely used in industries such as natural gas transportation, chemical production, and metallurgy due to their advantages such as high precision and ease of remote monitoring. They are used to achieve real-time monitoring of gas flow and provide key data support for production scheduling and trade settlement.

[0003] The gas turbine flow meter mainly includes a sensor part, a signal processing and transmission part, a display panel and a power supply. The sensor part includes a housing, a turbine and a flow guiding device. When the gas to be measured flows through the sensor, it drives the turbine to rotate. Its rotation speed is proportional to the gas flow rate. The rotation speed is converted into an electrical signal using the magnetoelectric conversion principle. After signal processing, the gas flow rate is finally measured. Therefore, the turbine is the core component of the entire flow meter.

[0004] However, gases often carry various impurities during transmission, such as metal particles, dust, and oil. These impurities easily adhere to the turbine blades and deposit as they pass through the sensor, forming fouling. Prolonged presence of this fouling alters the turbine's moment of inertia, increasing its rotational resistance and thus reducing its sensitivity, leading to a gradual decrease in the flow meter's measurement accuracy. The traditional solution is to disassemble the flow meter for cleaning its internal components. However, this method is not only cumbersome and time-consuming, but also prone to damaging the flow meter's internal structure during disassembly and reassembly, further affecting its measurement performance and lifespan. Utility Model Content

[0005] This utility model provides a self-cleaning gas turbine flow meter, which aims to achieve accurate turbine cleaning without disassembling the flow meter, reducing maintenance difficulty and cost, while effectively ensuring the measurement accuracy and service life of the flow meter.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a self-cleaning gas turbine flow meter, comprising:

[0007] The housing has a turbine rotatably connected to its inner cavity, and the housing is also equipped with a nozzle and a drain outlet.

[0008] A filtration unit, near the inlet end of the housing, includes a mounting base connected to the peripheral wall of the housing and a filter plate inserted into the mounting base. The filter plate is provided with a filter screen for filtering impurities in the gas.

[0009] The cleaning unit comprises a liquid injection cylinder, a piston push rod and a liquid supplementing cylinder. The liquid injection cylinder is connected to the peripheral wall of the shell. The liquid injection cylinder has a liquid injection cavity in communication with the inner cavity of the shell. The piston push rod is arranged through the liquid injection cylinder and is in sliding fit with the liquid injection cavity. The liquid supplementing cylinder is connected to the peripheral wall of the liquid injection cylinder and is in communication with the liquid injection cavity. The liquid supplementing cylinder is used for adding cleaning liquid into the liquid injection cavity.

[0010] The turbine is correspondingly arranged inside and outside the liquid injection cavity. The spray head is in communication with the liquid injection cavity. The piston push rod is used for pushing the cleaning liquid in the liquid injection cavity to the spray head to flush the turbine.

[0011] In a possible implementation, the filter unit further comprises an assembly assembly and a sealing assembly. The assembly assembly is used for locking the filter insert plate when the filter insert plate is inserted into the mounting seat.

[0012] The sealing assembly has a sealing insert strip which is horizontally and slidingly connected to the side wall of the filter insert plate. The sealing insert strip can be inserted into the mounting seat when the assembly assembly locks the filter insert plate for sealing.

[0013] In some embodiments, the inner wall of the mounting seat is provided with a first groove. The side wall of the filter insert plate is provided with a second groove. The assembly assembly comprises:

[0014] A plug-in column which is slidingly connected into the second groove;

[0015] A first elastic member which is connected between the plug-in column and the groove bottom wall of the second groove; and

[0016] A push column which is arranged through the side wall of the mounting seat and is in sliding fit with the first groove;

[0017] The first elastic member is used for elastically pushing the plug-in column into the first groove to lock the filter insert plate when the second groove and the first groove are axially aligned. The push column is used for reversely pushing the plug-in column to retract into the second groove to unlock the filter insert plate.

[0018] In some embodiments, the outer end of the plug-in column is provided with a guide portion which is gradually arc transitioned to one side of the filter insert plate from top to bottom.

[0019] In some embodiments, the sealing insert strip is provided with two sealing insert strips which are symmetrically arranged on the two side walls of the filter insert plate. The two inner walls of the mounting seat are respectively provided with sealing grooves. The sealing assembly further comprises:

[0020] A wedge-shaped block is slidably connected to the upper end of the filter insert plate in the up-down direction, and the two side walls of the wedge-shaped block converge towards the middle from top to bottom;

[0021] A second elastic member is connected between the two sealing insert strips.

[0022] The side of each of the two sealing insert strips is provided with a guide part that slidably cooperates with the side wall of the wedge-shaped block, and the wedge-shaped block can drive the sealing insert strips to move outward through the guide part when moving downward, so that the sealing insert strips are inserted into the sealing groove, and the second elastic member is used to elastically pull back the two sealing insert strips when the wedge-shaped block moves upward.

[0023] In some embodiments, the upper end of the filter insert plate is connected with a lifting seat plate, a driving screw is threadedly connected to the lifting seat plate, the driving screw extends in the up-down direction, the upper end of the wedge-shaped block is provided with a rotating groove, and the lower end of the driving screw is connected with a driving block that is rotatably connected to the rotating groove.

[0024] In a possible implementation, the piston push rod comprises:

[0025] A piston head is sealingly and slidably connected in the liquid injection cavity; and

[0026] A piston rod is connected to the end wall of the piston head, the outer end of the piston rod penetrates through the outer end wall of the liquid injection cylinder and slidably cooperates with the outer end wall of the liquid injection cylinder.

[0027] In some embodiments, the outer end of the piston rod is hingedly connected with a driving rod, and the lower end of the driving rod is hingedly connected to the liquid injection cylinder.

[0028] In some embodiments, the outer periphery of the piston rod is sleeved with a third elastic member, and the third elastic member is connected between the piston head and the outer end wall of the liquid injection cylinder.

[0029] In some embodiments, the inner peripheral wall of the liquid injection cylinder is provided with a limiting table that protrudes towards the axial center, and the limiting table is located between the piston head and the outer end wall of the liquid injection cylinder and is used to limit the sliding amplitude of the piston head.

[0030] The beneficial effect of the self-cleaning gas turbine flowmeter is that, compared with the prior art, the self-cleaning gas turbine flowmeter can filter the gas entering the inner cavity of the shell through the filter insert plate, effectively remove impurities in the gas, prevent impurities from interfering with the normal rotation of the turbine to cause deviation of the measurement data, periodically spray cleaning liquid to the turbine through the cleaning unit for cleaning the turbine, prevent the turbine surface from accumulating pollutants to reduce the sensitivity of the turbine, and effectively guarantee the measurement accuracy and service life of the flowmeter, and the waste liquid after flushing is discharged through the liquid discharge port to avoid the waste liquid remaining in the inner cavity of the shell. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0032] Figure 1 A structure schematic view of a self-cleaning gas turbine flowmeter provided by the present application embodiment is shown in the figure.

[0033] Figure 2 A structure schematic view of a filter insert plate provided by the present application embodiment is shown in the figure.

[0034] Figure 3 A structure schematic view of the A-A line in the present application embodiment is shown in the figure. Figure 2

[0035] A structure schematic view of the B-B line in the present application embodiment is shown in the figure. Figure 4

[0036] A structure schematic view of the B-B line in the present application embodiment is shown in the figure. Figure 5 Figure 4

[0037] Figure 6 An axial structure schematic view of a self-cleaning gas turbine flowmeter provided by the present application embodiment is shown in the figure.

[0038] In the figure, various reference signs are shown in the figure.​​

[0039] 1, housing; 11, drain port; 12, nozzle; 2, turbine; 3, filter unit; 31, mounting seat; 311, first groove; 312, sealing groove; 32, filter insert; 321, second groove; 322, sliding cavity; 33, filter screen; 34, assembly component; 341, plug-in column; 3411, guide portion; 342, first elastic member; 343, push column; 35, sealing assembly; 351, sealing insert; 3511, guide portion; 352, wedge block; 3521, rotating groove; 353, second elastic member; 36, pull seat plate; 37, drive screw; 371, drive block; 4, cleaning unit; 41, liquid injection cylinder; 411, liquid injection cavity; 412, limiting table; 42, piston push rod; 421, piston head; 422, piston rod; 43, liquid supplementing cylinder; 44, drive rod; 45, third elastic member. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or several of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.

[0042] Please refer to Figures 1 to 6The utility model provides a kind of self-cleaning gas turbine flowmeter, which is described as follows.The self-cleaning gas turbine flowmeter includes a housing 1, a filter unit 3, and a cleaning unit 4. A turbine 2 is rotatably connected in the inner cavity of the housing 1. A spray head 12 and a liquid discharge port 11 are also provided in the housing 1. The filter unit 3 is located near the inlet end of the housing 1. The filter unit 3 includes a mounting seat 31 connected to the peripheral wall of the housing 1 and a filter plug-in board 32 inserted into the mounting seat 31. The filter plug-in board 32 is provided with a filter screen 33. The filter screen 33 is used to filter impurities in the gas. The cleaning unit 4 includes a liquid injection cylinder 41, a piston push rod 42, and a liquid supplement cylinder 43. The liquid injection cylinder 41 is connected to the peripheral wall of the housing 1. The liquid injection cylinder 41 has a liquid injection cavity 411 communicating with the inner cavity of the housing 1. The piston push rod 42 penetrates through the liquid injection cylinder 41 and is in sliding cooperation with the liquid injection cavity 411. The liquid supplement cylinder 43 is connected to the peripheral wall of the liquid injection cylinder 41 and communicates with the liquid injection cavity 411. The liquid supplement cylinder 43 is used to add cleaning liquid into the liquid injection cavity 411. The turbine 2 corresponds to the inside and outside of the liquid injection cavity 411. The spray head 12 communicates with the liquid injection cavity 411. The piston push rod 42 is used to push the cleaning liquid in the liquid injection cavity 411 to the spray head 12 to flush the turbine 2.

[0043] Compared with the prior art, the self-cleaning gas turbine flowmeter provided by the embodiment can filter the gas entering the inner cavity of the housing 1 through the filter screen 33, effectively remove impurities in the gas, and prevent impurities from interfering with the normal rotation of the turbine 2 to cause deviation in the measured data. The cleaning unit 4 can periodically spray cleaning liquid to the turbine 2 to clean the turbine 2, prevent pollutants from accumulating on the surface of the turbine 2 to reduce the sensitivity of the turbine 2, and effectively ensure the measurement accuracy and service life of the flowmeter. The waste liquid after flushing is discharged through the liquid discharge port 11 to avoid residual waste liquid in the inner cavity of the housing 1. On this basis, the plug-in connection of the filter plug-in board 32 and the mounting seat 31 facilitates the disassembly, assembly, and replacement of the filter screen 33, ensuring the continuous and effective filtering function. The liquid supplement cylinder 43 can supplement cleaning liquid to the liquid injection cavity 411 in a timely manner, ensuring the continuity of the cleaning work. At the same time, the piston push rod 42 can supply cleaning liquid to the spray head 12 in the inner cavity of the housing 1, so that the cleaning liquid can efficiently reach the turbine 2. This realizes accurate cleaning of the turbine 2 without disassembling the flowmeter, greatly simplifies the maintenance process, and reduces the maintenance difficulty and cost.

[0044] In the embodiment, the mounting seat 31 is connected to the housing 1 and has an upwardly open mounting cavity. When the filter plug-in board 32 is inserted into the mounting cavity from top to bottom, the filter screen 33 can be coaxially located in the inner cavity of the housing 1, facilitating the overall filtration of the gas passing through the housing 1. When the impurities on the filter screen 33 accumulate too much, the filter plug-in board 32 can be pulled out from the mounting cavity upwardly, facilitating the cleaning or replacement of the filter screen 33.

[0045] The liquid injection cylinder 41 is connected to the outer wall of the shell 1 by a fastener such as a bolt, facilitating disassembly and cleaning of the unit 4 for maintenance. The liquid supplement cylinder 43 can be connected to the liquid injection cylinder 41 by a threaded connection. It should be noted that the connection position of the liquid injection cylinder 41 to the shell 1 and the connection position of the liquid supplement cylinder 43 to the liquid injection cylinder 41 need to be strictly sealed to avoid the problem of gas escaping from the shell 1 and cleaning liquid leaking during cleaning.

[0046] Specifically, the liquid supplement cylinder 43 can be made of transparent material, such as glass, to facilitate observation of the amount of cleaning liquid in the liquid supplement cylinder 43 and ensure timely replenishment of the cleaning liquid. The upper end of the liquid supplement cylinder 43 is connected with a dustproof cover to prevent dust from entering.

[0047] Preferably, the liquid injection cylinder 41 is horizontally arranged, and the liquid supplement cylinder 43 is vertically connected above the liquid injection cylinder 41, which helps the cleaning liquid in the liquid supplement cylinder 43 to flow into the liquid injection cavity 411 under the action of gravity, ensuring continuous supply of the cleaning liquid. Further, a one-way valve can be arranged between the spray head 12 and the liquid injection cavity 411 to facilitate the formation of a vacuum in the liquid injection cavity 411 when the piston push rod 42 slides outward, accelerating the entry of cleaning liquid in the liquid supplement cylinder 43, while preventing the backflow of cleaning liquid in the cavity of the shell 1.

[0048] The liquid outlet 11 is arranged below the turbine 2 to facilitate the downward discharge of waste liquid after flushing the turbine 2. When the flow meter is in a working state or a cleaning state, the liquid outlet 11 is sealingly connected to the shell 1, and is only opened to discharge waste liquid after flushing the turbine 2.

[0049] In some possible implementations, the above-mentioned filtering unit 3 adopts a structure as shown in Figures 1 to 5 . Referring to Figures 1 to 5 , the filtering unit 3 further includes an assembly assembly 34 and a sealing assembly 35. The assembly assembly 34 is used to lock the filter insert plate 32 when the filter insert plate 32 is inserted into the mounting seat 31. The sealing assembly 35 has a sealing insert strip 351 horizontally slidingly connected to the side wall of the filter insert plate 32, which can be inserted into the mounting seat 31 for sealing when the assembly assembly 34 locks the filter insert plate 32.

[0050] In the present embodiment, the assembly assembly 34 can lock the filter insert plate 32 when it is inserted into the mounting seat 31, so that the filter insert plate 32 remains in a fixed position during the operation of the flow meter and will not be displaced or loosened due to impact force generated by gas flow or equipment vibration and other factors, thereby ensuring the stability and reliability of the filtering function.

[0051] The sealing assembly 35 realizes the sealing between the filter insert plate 32 and the mounting seat 31 by inserting the sealing insert 351 into the mounting seat 31. Specifically, the sealing insert 351 is in sliding connection with the filter insert plate 32 and can slide horizontally out of the side wall of the filter insert plate 32 and be inserted into the mounting seat 31, effectively filling the gap between the filter insert plate 32 and the mounting seat 31 and forming a good sealing effect, preventing the gas in the cavity of the housing 1 from leaking from the connection between the filter insert plate 32 and the mounting seat 31 and ensuring the airtightness of the flowmeter.

[0052] The assembly assembly 34 firmly locks the filter insert plate 32 on the mounting seat 31, providing a stable mounting basis for the sealing insert 351 of the sealing assembly 35, and thus realizing a good sealing effect. The locking action of the assembly assembly 34 and the sealing action of the sealing assembly 35 complement each other, preventing gas from leaking from the connection of the filter unit 3 from two aspects of mechanical fixation and sealing, and ensuring the accuracy of gas flow measurement.

[0053] In some possible implementations, the assembly assembly 34 adopts the structure as shown in Figure 1 and Figure 5 . Referring to Figure 1 and Figure 5 , the inner wall of the mounting seat 31 is provided with a first groove 311, and the side wall of the filter insert plate 32 is provided with a second groove 321. The assembly assembly 34 includes a plug-in column 341, a first elastic member 342, and a pushing column 343. The plug-in column 341 is in sliding connection in the second groove 321. The first elastic member 342 is connected between the plug-in column 341 and the groove bottom wall of the second groove 321. The pushing column 343 is arranged through the side wall of the mounting seat 31 and in sliding cooperation with the first groove 311.

[0054] The first elastic member 342 is used to elastically push the plug-in column 341 into the first groove 311 to lock the filter insert plate 32 when the second groove 321 and the first groove 311 are axially aligned. The pushing column 343 is used to reversely push the plug-in column 341 to retract into the second groove 321 to unlock the filter insert plate 32.

[0055] In this embodiment, when the filter insert plate 32 is inserted into the mounting seat 31, the plug-in column 341 compresses the first elastic member 342 and retracts into the second groove 321 due to the relative extrusion between the inner wall of the mounting seat 31 and the side wall of the filter insert plate 32. With the continuous insertion of the filter insert plate 32, when the second groove 321 and the first groove 311 are axially aligned, the first elastic member 342 rebounds and elastically pushes the plug-in column 341 outward so that the outer end of the plug-in column 341 is inserted into the first groove 311, realizing the plug-in locking of the filter insert plate 32.

[0056] When the filter insert plate 32 needs to be unlocked, the push column 343 is pushed to slide inward along the mounting seat 31, and the inner end reversely pushes the plug-in column 341 to retract into the second groove 321, so that the locking is released, and the filter insert plate 32 is pulled upward to be taken out, so that the filter screen 33 can be cleaned, replaced and maintained.

[0057] Specifically, the assembly component 34 is provided with four groups, and two groups are correspondingly located on the two side walls of the mounting seat 31, so as to ensure the stability and reliability of the locking state. When unlocking, the operator can simultaneously press the two push columns 343 located on the two sides of the mounting seat 31, so as to facilitate quick unlocking.

[0058] The above structure of the assembly component 34 greatly simplifies the installation steps of the filter insert plate 32, helps to improve the maintenance efficiency of the equipment, and is especially suitable for scenes where the filter insert plate 32 needs to be frequently replaced or maintained.

[0059] Specifically, the outer end of the plug-in column 341 is provided with a guide portion 3411 which is gradually arc-shaped to the side of the filter insert plate 32 from top to bottom.

[0060] When the filter insert plate 32 is inserted into the mounting seat 31, the bottom of the guide portion 3411 first contacts the top wall of the mounting seat 31. With the downward movement of the filter insert plate 32, the arc-shaped transition shape of the guide portion 3411 can automatically guide the plug-in column 341 to gradually retract into the second groove 321, so that the filter insert plate 32 can be smoothly inserted into the mounting seat 31 to complete the locking action. The above setting not only makes the filter insert plate 32 more easily inserted into the mounting seat 31, reduces the installation difficulty, but also reduces the wear of the filter insert plate 32 and the inner wall of the mounting seat 31, prolongs the service life of the assembly component 34.

[0061] In some possible implementations, the sealing assembly 35 adopts a structure as shown in Figures 2 to 4 . Referring to Figures 2 to 4 , the sealing insert strip 351 is provided with two sealing insert strips 351 which are symmetrically arranged on the two side walls of the filter insert plate 32, and the two inner walls of the mounting seat 31 are respectively provided with sealing grooves 312. The sealing assembly 35 further includes a wedge-shaped block 352 and a second elastic member 353. The wedge-shaped block 352 is slidingly connected to the upper end of the filter insert plate 32 in the upward and downward direction, and the two side walls of the wedge-shaped block 352 converge to the middle part from top to bottom. The second elastic member 353 is connected between the two sealing insert strips 351.

[0062] The two sealing inserts 351 are respectively provided with a guide portion 3511 on the side adjacent to the wedge block 352, the wedge block 352 can drive the sealing inserts 351 to move outward through the guide portion 3511 when moving downward, so that the sealing inserts 351 are inserted into the sealing grooves 312, and the second elastic member 353 is used to elastically pull back the two sealing inserts 351 when the wedge block 352 moves upward.

[0063] In the embodiment, the two sealing inserts 351 are pulled back to the inside of the filter insert plate 32 under the action of the second elastic member 353 before the filter insert plate 32 is inserted into the mounting seat 31, so as to avoid interfering with the insertion action of the filter insert plate 32. When the filter insert plate 32 is inserted and locked in the mounting seat 31, the wedge block 352 is pushed downward, and the two gradually inclined side walls of the wedge block 352 are in sliding cooperation with the guide portions 3511 of the sealing inserts 351. With the downward movement of the wedge block 352, the two sealing inserts 351 are gradually pushed outward by the side walls of the wedge block 352, and the second elastic member 353 is stretched, until the sealing inserts 351 are respectively inserted into the sealing grooves 312 on the two inner walls of the mounting seat 31, so as to realize the sealing between the filter insert plate 32 and the mounting seat 31. The greater the downward pressure of the wedge block 352, the tighter the sealing effect. Locking the wedge block 352 at a suitable position ensures the sealing effect.

[0064] When the filter insert plate 32 is disassembled, the wedge block 352 needs to be operated to move upward first, so as to release the pushing force on the sealing inserts 351, release the elastic potential energy of the second elastic member 353, elastically pull back the two sealing inserts 351, make the two sealing inserts 351 out of the sealing grooves 312 and retract into the filter insert plate 32, and then unlock the assembly component 34. After that, the filter insert plate 32 can be taken out of the mounting seat 31.

[0065] Specifically, the filter insert plate 32 is provided with two sliding cavities 322 for the sliding of the sealing inserts 351, the middle portions of the two sliding cavities 322 are mutually penetrated, and the second elastic member 353 and the guide portions 3511 are provided with a connecting space, so that the two sealing inserts 351 can move outward synchronously under the driving of the wedge block 352, and can retract synchronously under the action of the second elastic member 353.

[0066] The above structure of the sealing assembly 35 can control the outward movement and retraction of the sealing inserts 351 by operating the upward and downward movement of the wedge block 352 above the filter insert plate 32, so as to operate the sealing assembly 35 in the locked state of the assembly component 34 and control the sealing state. The operation process is simple and fast, without the need for complex tools or professional skills, which reduces the working difficulty of the operator and improves the efficiency of equipment maintenance, while ensuring the sealing effect.

[0067] In some possible embodiments, the upper end of the filter plug-in plate 32 is connected with a pulling seat plate 36, the pulling seat plate 36 is threadedly connected with a driving screw 37, the driving screw 37 extends in the up-down direction, the upper end of the wedge-shaped block 352 is provided with a rotating groove 3521, and the lower end of the driving screw 37 is connected with a driving block 371, which is rotationally connected in the rotating groove 3521.

[0068] The pulling seat plate 36 is connected to the upper end of the filter plug-in plate 32 by means of bolts or other fasteners. On the one hand, this facilitates the installation of the wedge-shaped block 352. On the other hand, when the filter plug-in plate 32 is inserted into the mounting seat 31, the pulling seat plate 36 is higher than the top surface of the mounting seat 31, which facilitates the upward pulling of the filter plug-in plate 32 by gripping the pulling seat plate 36, thereby achieving the disassembly of the filter plug-in plate 32.

[0069] In addition, the driving screw 37 is threadedly connected to the pulling seat plate 36, which facilitates the operation of the driving screw 37 from above the pulling seat plate 36, thereby achieving the operation of the wedge-shaped block 352. Specifically, the driving block 371 at the lower end of the driving screw 37 is located in the rotating groove 3521 of the wedge-shaped block 352 and can rotate in the rotating groove 3521. When the driving screw 37 is rotated, the driving screw 37 moves up and down while rotating due to the threaded connection between the driving screw 37 and the pulling seat plate 36, thereby driving the wedge-shaped block 352 to move up and down through the driving block 371.

[0070] It should be noted that the threaded connection structure itself has a self-locking feature. Therefore, by rotating the driving screw 37 to drive the wedge-shaped block 352 to move up and down, the sealing state of the sealing plug 351 can be adjusted, and the sealing assembly 35 can be maintained in the required sealing state, thereby ensuring the sealing effect.

[0071] In some possible implementations, the piston push rod 42 has a structure as shown in Figure 6 . As shown in Figure 6 , the piston push rod 42 includes a piston head 421 and a piston rod 422. The piston head 421 is sealingly and slidingly connected in the liquid injection cavity 411. The piston rod 422 is connected to the end wall of the piston head 421, and the outer end of the piston rod 422 penetrates through the outer end wall of the liquid injection cylinder 41 and is in sliding fit with the outer end wall of the liquid injection cylinder 41.

[0072] In this embodiment, the piston head 421 and the piston rod 422 are detachably connected, which facilitates the replacement and maintenance of parts. Specifically, a sealing ring is arranged on the peripheral wall of the piston head 421 to ensure the sealing connection between the piston head 421 and the liquid injection cavity 411, thereby preventing the leakage of the cleaning liquid. Further, inclined flow guide surfaces that are in cooperation with each other are respectively arranged on the inner end face of the piston head 421 and the inner end wall of the liquid injection cylinder 41, which facilitates the flow of the cleaning liquid in the liquid injection cavity 411 into the inner cavity of the shell 1 when the piston head 421 is pushed in, thereby avoiding the retention of the cleaning liquid.

[0073] In some possible embodiments, the outer end of the piston rod 422 is hingedly connected with a driving rod 44, and the lower end of the driving rod 44 is hingedly connected with the liquid injection cylinder 41.

[0074] Through the arrangement of the two hinging points, the driving rod 44 forms a labor-saving lever structure, and through holding and operating the upper end of the driving rod 44, the piston rod 422 can be easily driven to slide, the piston head 421 can slide in the liquid injection cavity 411, and the extraction and pushing of the cleaning liquid can be realized.

[0075] Specifically, the upper end of the driving rod 44 is provided with a handle ball, which is convenient for an operator to hold.

[0076] In some possible embodiments, the outer periphery of the piston rod 422 is sleeved with a third elastic member 45, and the third elastic member 45 is connected between the piston head 421 and the outer end wall of the liquid injection cylinder 41.

[0077] When the third elastic member 45 is in a reset state, the piston head 421 can be stably kept at the initial position, the piston head 421 can be accurately returned to the initial position after each sliding, the consistency and accuracy of each cleaning operation are ensured, and the pushing amount and pushing frequency of the cleaning liquid can be accurately controlled.

[0078] Meanwhile, the third elastic member 45 can effectively alleviate the collision and vibration between the piston head 421 and the liquid injection cavity 411, the sliding process of the piston head 421 is more stable, and the noise generated in the working process of the flowmeter and the cleaning process of the cleaning unit 4 is reduced.

[0079] In some possible embodiments, the inner peripheral wall of the liquid injection cylinder 41 is provided with a limiting table 412 protruding to the axial center side, the limiting table 412 is located between the piston head 421 and the outer end wall of the liquid injection cylinder 41, and is used for limiting the sliding amplitude of the piston head 421, so that the piston head 421 is prevented from excessively sliding due to excessive stress on the driving rod 44, and the third elastic member 45 is prevented from being excessively compressed, and the service life of the third elastic member 45 is helped to be ensured.

[0080] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A self-cleaning gas turbine flowmeter characterized by, The utility model relates to a turbine cleaning device, including: The shell (1) is connected with turbine (2) in the inner chamber rotation, the shell (1) still is equipped with shower nozzle (12) and liquid discharge port (11) in; Filter unit (3) is close to the inlet end of shell (1), including the mounting seat (31) connected on the peripheral wall of shell (1) and filter insert board (32) inserted in mounting seat (31), filter insert board (32) is equipped with filter screen (33), filter screen (33) is used for filtering the impurity in gas; And Cleaning unit (4) includes liquid injection cylinder (41), piston push rod (42) and liquid supplement cylinder (43), liquid injection cylinder (41) is connected on the peripheral wall of shell (1), liquid injection cylinder (41) has liquid injection cavity (411) with the inner chamber communication of shell (1), piston push rod (42) is set through liquid injection cylinder (41) and is with liquid injection cavity (411) sliding fit, liquid supplement cylinder (43) is connected on the peripheral wall of liquid injection cylinder (41) and is communicated with liquid injection cavity (411), liquid supplement cylinder (43) is used for adding cleaning fluid to liquid injection cavity (411); Wherein, turbine (2) and liquid injection cavity (411) inside and outside corresponding, shower nozzle (12) is communicated with liquid injection cavity (411), piston push rod (42) is used for pushing the cleaning fluid in liquid injection cavity (411) to shower nozzle (12) and is used for flushing turbine (2).

2. A self-cleaning gas turbine flowmeter as defined in claim 1 wherein, Filter unit (3) still includes assembly component (34) and sealing assembly (35), assembly component (34) is used for locking filter insert board (32) when filter insert board (32) is inserted in mounting seat (31); Sealing assembly (35) has sealing insert strip (351) horizontally slidingly connected on the side wall of filter insert board (32), sealing insert strip (351) can be inserted in mounting seat (31) when assembly component (34) locks filter insert board (32) and is used for sealing.

3. A self-cleaning gas turbine flowmeter as defined in claim 2 wherein, The inner wall of mounting seat (31) is equipped with first recess (311), and the side wall of filter insert board (32) is equipped with second recess (321), and assembly component (34) includes: Plug-in column (341) is slidingly connected in second recess (321); First elastic member (342) is connected between plug-in column (341) and the groove bottom wall of second recess (321); And Pushing column (343) is set through the side wall of mounting seat (31) and is slidingly fitted with first recess (311); Wherein, first elastic member (342) is used for elastically pushing plug-in column (341) to be inserted in first recess (311) when second recess (321) and first recess (311) are axially aligned, to lock filter insert board (32);Pushing column (343) is used for retracting plug-in column (341) to second recess (321) in reverse, to unlock filter insert board (32).

4. A self-cleaning gas turbine flowmeter as defined in claim 3 wherein, The outer end of the plug column (341) is provided with a guide part (3411) which is gradually transitioned to the side of the filter plug-in plate (32) in a circular arc from top to bottom.

5. A self-cleaning gas turbine flowmeter as defined in claim 2 wherein, The sealing plug strips (351) are provided with two sealing plug strips (351) which are symmetrically arranged on the two side walls of the filter plug-in plate (32), and the two inner walls of the mounting seat (31) are respectively provided with a sealing groove (312), and the sealing assembly (35) further comprises: A wedge block (352) is connected to the upper end of the filter plug-in plate (32) in the up-down direction, and the two side walls of the wedge block (352) converge from top to bottom to the middle part; A second elastic member (353) is connected between the two sealing plug strips (351); Wherein, the side of the two sealing plug strips (351) adjacent to each other is respectively provided with a guide part (3511) which is in sliding cooperation with the side wall of the wedge block (352), and the wedge block (352) can drive the sealing plug strip (351) to move outward when moving downward through the guide part (3511) to make the sealing plug strip (351) inserted into the sealing groove (312), and the second elastic member (353) is used for elastically pulling back the two sealing plug strips (351) when the wedge block (352) moves upward.

6. A self-cleaning gas turbine flowmeter as defined in claim 5 wherein, The upper end of the filter plug-in plate (32) is connected with a lifting seat plate (36), the driving screw (37) is threadedly connected on the lifting seat plate (36), the driving screw (37) extends in the up-down direction, the upper end of the wedge block (352) is provided with a rotating groove (3521), and the lower end of the driving screw (37) is connected with a driving block (371), the driving block (371) is rotatably connected in the rotating groove (3521).

7. A self-cleaning gas turbine flowmeter as defined in claim 1 wherein, The piston push rod (42) comprises: A piston head (421) is sealingly and slidingly connected in the liquid injection cavity (411); and A piston rod (422) is connected to the end wall of the piston head (421), and the outer end of the piston rod (422) penetrates through the outer end wall of the liquid injection cylinder (41) and is in sliding cooperation with the outer end wall of the liquid injection cylinder (41).

8. A self-cleaning gas turbine flowmeter as defined in claim 7 wherein, The outer end of the piston rod (422) is hinged with a driving rod (44), and the lower end of the driving rod (44) is hinged to the liquid injection cylinder (41).

9. A self-cleaning gas turbine flowmeter as defined in claim 7 wherein, The outer periphery of the piston rod (422) is sleeved with a third elastic member (45), and the third elastic member (45) is connected between the piston head (421) and the outer end wall of the liquid injection cylinder (41).

10. A self-cleaning gas turbine flowmeter as defined in claim 9 wherein, The inner peripheral wall of the liquid injection cylinder (41) is provided with a limiting table (412) which is protruded to the side of the shaft center, and the limiting table (412) is located between the piston head (421) and the outer end wall of the liquid injection cylinder (41) to limit the sliding amplitude of the piston head (421).

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