Instrument sealing assembly

Abstract

The utility model discloses an instrument sealing assembly which comprises a shell, a filter screen is arranged on the inner wall of a cavity of the shell, an impeller is arranged in the shell and located in the filter screen, a sealing box is arranged at the upper end of the shell, and a connecting rod is arranged in the middle of the sealing box. Double sealing is achieved at the connecting position of the sealing box and the shell through the rubber ring on the outer ring of the bottom and the edge portion on the edge, the rubber ring is tightly attached to the upper portion of the inner cavity of the shell, dust, impurities and water are effectively prevented from invading from the bottom, the edge portion covers the edge portion of the upper end of the shell, the sealing effect is further enhanced, and the sealing effect is improved. And the two sealing rings installed on the connecting rod are located above and below the sealing box respectively, the sealing performance between the shaft rod and the sealing box is ensured, and then liquid is prevented from leaking from a gap between the shaft rod and the sealing box.

Description

TECHNICAL FIELD

[0001] The utility model relates to instrument and meter technical field, concretely relates to a kind of instrument and meter sealing assembly. BACKGROUND

[0002] Instrument and meter are used to detect, measure, observe, calculate various physical quantities, material composition, physical property parameters and other appliances or equipment.The core function of water meter is to measure the flow of water, a physical quantity, and by measuring the flow of water, the amount of water used by the user is obtained.It can accurately count the volume of water flowing through the pipeline, and the common measurement unit is cubic meter.Water meter is divided into mechanical water meter, intelligent water meter and ultrasonic water meter.

[0003] If the seal between the cover and the water meter body of the existing mechanical water meter is not good, dust, impurities and other external factors may enter the water meter, affecting the normal operation of the water meter, and even may enter the counter, causing inaccurate reading.In addition, if the cover sealing place leaks, it will also damage the internal parts of the water meter.The mechanical parts are easy to be blocked or worn by impurities in water, resulting in inaccurate measurement and water meter failure, such as rotor water meter, which is easy to be wound by impurities when used in poor water quality pipeline.

[0004] Therefore, it is necessary to invent an instrument and meter sealing assembly to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an instrument and meter sealing assembly to solve the above problems in the art.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme: an instrument and meter sealing assembly, comprising a shell, a filter screen is arranged on the inner wall of the cavity of the shell, a rotor is arranged in the shell and in the filter screen, a sealing box is arranged at the upper end of the shell, a connecting rod is arranged at the middle position of the sealing box;

[0007] The lower end of the connecting rod penetrates the bottom of the sealing box, a clamping block is fixedly installed at the bottom of the connecting rod, a shaft is fixedly installed at the middle position of the rotor, a clamping groove is formed at the upper end of the shaft, the clamping groove is matched with the clamping block at the lower end of the connecting rod, and is connected by clamping, and the top end of the shaft is below the bottom of the sealing box;

[0008] A transmission wheel is fixedly installed at the upper end of the connecting rod, sealing rings are fixedly installed above and below the connecting rod, and the two sealing rings are arranged above and below the sealing box respectively.

[0009] As a preferred scheme of the utility model, the bottom outer ring of the sealing box is fixedly installed with a rubber ring, the upper surface of the rubber ring is attached to the upper part of the inner cavity of the shell, the edge position of the sealing box is fixedly installed with an edge part, and the edge part is covered on the upper end edge part of the shell.

[0010] As a preferred scheme of the utility model, the upper part of the sealing box is provided with an end cover, the lower part of the end cover is provided with a plurality of gears, the upper surface of the end cover is provided with a plurality of scale tables, the gears and the scale tables on the end cover are connected one by one, and the edge part of the end cover is covered on the upper part of the edge part of the sealing box.

[0011] As a preferred scheme of the utility model, the upper end and the lower end of the filter screen are both installed with annular strips, the annular strips are in semicircular structure, the end parts of the two annular strips at the same end are rotationally connected, and the filter screen can be in a folded structure through the annular strips.

[0012] As a preferred scheme of the utility model, the top of the shell is covered with a shell cover, the shell cover is threadedly connected with the top end of the shell, the upper end outer side of the shell and the lower outer side of the shell cover are both fixedly installed with connecting parts, and the shell cover and the connecting parts of the shell are fixedly connected through bolts.

[0013] As a preferred scheme of the utility model, the lower end of the shaft rod penetrates the bottom of the filter screen and is rotationally connected with the bottom of the inner cavity of the shell, and the transmission wheel on the upper end of the connecting rod is meshingly connected with the plurality of gears below the end cover.

[0014] In the above technical scheme, the utility model provides technical effects and advantages:

[0015] 1. Through the rubber ring of the bottom outer ring and the edge part of the edge at the connecting part of the sealing box and the shell, double sealing is realized, the rubber ring is closely attached to the upper part of the inner cavity of the shell, dust, impurities and moisture are effectively prevented from invading from the bottom, the edge part is covered on the upper end edge part of the shell, the sealing effect is further enhanced, external pollutants are prevented from entering from the side, the two sealing rings installed on the connecting rod are located above and below the sealing box respectively, the sealing between the shaft rod and the sealing box is ensured, and then liquid leakage from the gap between the shaft rod and the sealing box is prevented.

[0016] 2. The filter screen arranged on the inner wall of the shell can effectively intercept impurities in water and prevent the impurities from entering the impeller area, especially in the environment with poor water quality, the filter screen can avoid the impeller being wound by impurities, the normal rotation of the impeller is ensured, the accuracy of measurement is improved, the water meter failure caused by impurity blockage is reduced, the filter screen can be in a folded structure through the annular strips, operation is facilitated during installation, maintenance or cleaning, the design makes the filter screen more easily taken out and installed without affecting the filtering function, maintenance efficiency is improved, and maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 It is a perspective view of the overall structure of the present application.

[0019] Figure 2 It is a sectional view of the overall structure of the present application.

[0020] Figure 3 It is the first perspective view of the overall structure of the present application

[0021] Figure 4 It is the second perspective view of the overall structure of the present application.

[0022] Figure 5 It is the A area of the present application Figure 3 enlarged view.

[0023] Explanation of reference signs:

[0024] 1, shell; 2, filter screen; 21, annular strip; 3, impeller; 31, shaft; 32, clamping groove; 4, connecting rod; 41, clamping block; 42, transmission wheel; 43, sealing ring; 5, sealing box; 51, rubber ring; 52, along the edge part; 6, end cover; 7, shell cover; 71, connecting part. DETAILED DESCRIPTION

[0025] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0026] The present application provides a Figures 1-5The illustrated instrument sealing assembly includes a housing 1, which serves as the main frame of the entire instrument, providing installation and support space for all internal components, ensuring orderly layout of the components inside, and working together to complete the measurement function. The inner wall of the cavity of the housing 1 is provided with a filter screen 2, which is installed on the inner wall of the cavity of the housing 1, can effectively intercept impurities in the water, prevent these impurities from entering the area where the impeller 3 is located, avoid the impeller 3 being entangled by impurities, ensure that the impeller 3 can normally rotate in a relatively clean water flow environment, and thus improve the accuracy of measurement and reduce water meter failure caused by impurities blockage. Inside the housing 1 and located inside the filter screen 2 is an impeller 3, which is a key component for measuring water flow and rotates under the impact of water flow. Its rotation speed is related to the water flow rate. This way realizes the perception of water flow, providing a basis for subsequent measurement. The upper end of the housing 1 is provided with a sealing box 5, and the middle position of the sealing box 5 is provided with a connecting rod 4, which provides precise positioning for the components connected above and below, ensures the accuracy of the relative positions of the components, and thus ensures the stability and reliability of the transmission process.

[0027] The lower end of the connecting rod 4 penetrates the bottom of the sealing box 5, and the bottom of the connecting rod 4 is fixedly installed with a clamping block 41. The middle position of the impeller 3 is fixedly installed with a shaft 31, and the upper end of the shaft 31 is provided with a clamping groove 32. The clamping groove 32 is matched with the clamping block 41 at the lower end of the connecting rod 4 and is connected by clamping. The top end of the shaft 31 is located below the bottom of the sealing box 5. The sealing box 5 is located at the upper end of the housing 1, which separates the internal transmission components from the external environment, effectively preventing dust, impurities and moisture from entering, protecting the internal components from pollution and corrosion, and ensuring the normal operation and reading accuracy of the instrument.

[0028] The upper end of the connecting rod 4 is fixedly installed with a transmission wheel 42, and the upper and lower ends of the connecting rod 4 are fixedly installed with sealing rings 43. The two sealing rings 43 are located above and below the sealing box 5, respectively. The two sealing rings 43 are located above and below the sealing box 5, respectively, which effectively enhances the sealing between the shaft 31 and the sealing box 5, prevents liquid from leaking from the gap between the shaft 31 and the sealing box 5, and prevents dust and other impurities from entering the sealing box 5.

[0029] Further, in the above technical solution, the bottom outer ring of the sealing box 5 is fixedly installed with a rubber ring 51, and the upper surface of the rubber ring 51 is attached to the upper part of the internal cavity of the housing 1, forming the first line of defense for sealing, preventing impurities and moisture from entering from the bottom. The edge position of the sealing box 5 is fixedly installed with an edge part 52, which covers the upper end edge part of the housing 1. The edge part 52 at the edge position covers the upper end edge part of the housing 1, further enhancing the sealing effect and forming the second line of defense to prevent external pollutants from entering from the side.

[0030] Further, in the above technical solution, the upper portion of the sealing box 5 is provided with an end cover 6, the lower portion of the end cover 6 is provided with a plurality of gears, the upper surface of the end cover 6 is provided with a plurality of scale tables, the gears and the scale tables on the end cover 6 are connected one by one, the edge portion of the end cover 6 is capped on the upper portion of the edge portion 52 of the sealing box 5, the upper surface of the end cover 6 is provided with a plurality of scale tables connected one by one with the gears below, the movement of the transmission component is converted into intuitive readings, which facilitates the user to read the water flow data and realizes the metering display function of the instrument.

[0031] Further, in the above technical solution, the upper end and the lower end of the filter screen 2 are both provided with annular strips 21, the annular strips 21 are in a semicircular structure, the end portions of the two annular strips 21 at the same end are rotationally connected, the filter screen 2 can be in a folded structure through the annular strips 21, and the upper end and the lower end of the filter screen 2 are both provided with annular strips 21 in a semicircular structure and rotationally connected at the end portions, so that the filter screen 2 can be in a folded structure. This design facilitates the operation of the filter screen 2 during installation, maintenance or cleaning, and the filter screen 2 can be easily taken out of the shell 1 when it needs to be cleaned or replaced, thereby improving the maintenance efficiency and reducing the maintenance cost.

[0032] Further, in the above technical solution, the top of the shell 1 is capped with a shell cover 7, the shell cover 7 is threadedly connected with the top end of the shell 1, the upper end of the shell 1 and the lower end of the shell cover 7 are both fixedly provided with connecting portions 71, and the shell cover 7 and the connecting portions 71 of the shell 1 are fixedly connected through bolts. This double connecting mode guarantees the stability of the connection between the shell cover 7 and the shell 1, facilitates the disassembly and assembly when needed, and facilitates the maintenance and repair of the internal components.

[0033] Further, in the above technical solution, the lower end of the shaft 31 penetrates through the bottom of the filter screen 2 and is rotationally connected with the bottom of the internal cavity of the shell 1, and the transmission wheel 42 at the upper end of the connecting rod 4 is meshingly connected with the plurality of gears below the end cover 6.

[0034] The working process of the sealing assembly of the instrument is as follows:

[0035] When the water flow enters the shell 1 of the instrument through the pipeline, the water flow passes through the filter screen 2, the filter screen 2 intercepts the impurities and dirt in the water, and the relatively clean water flow impacts the impeller 3. The impeller 3 starts to rotate under the action of the water flow, and the shaft 31 rotates together with the impeller 3. The clamping groove 32 at the upper end of the shaft 31 is clamped and connected with the clamping block 41 at the lower end of the connecting rod 4, and the rotation of the shaft 31 drives the rotation of the connecting rod 4. The sealing rings 43 above and below the connecting rod 4 guarantee the sealing between the sealing box 5 and the connecting rod 4, prevent impurities and water from entering the internal interference transmission of the sealing box 5. The transmission wheel 42 at the upper end of the connecting rod 4 rotates with the connecting rod 4 and is meshed with the plurality of gears below the end cover 6, and the rotation is transmitted to the gear system below the end cover 6.

[0036] The rubber ring 51 at the bottom of the sealing box 5 and the edge portion 52 of the edge of the sealing box 5 are tightly matched with the shell 1, and the edge portion of the end cover 6 is pressed on the edge portion 52 of the sealing box 5, which together constitute a multi-layer sealing structure, effectively preventing dust, impurities and moisture from the outside from entering the inside of the instrument, protecting the impeller 3, the transmission components and the like inside, and ensuring that the instrument works stably and accurately. The shell cover 7 further provides protection for the entire instrument to prevent physical collision from the outside from damaging the internal components.

[0037] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for those skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. An instrument sealing assembly comprising a housing (1), characterised in that: The inner wall of the cavity of the shell (1) is provided with a filter screen (2), the shell (1) is provided with an impeller (3) inside and in the filter screen (2), the upper end of the shell (1) is provided with a sealing box (5), the middle position of the sealing box (5) is provided with a connecting rod (4); The lower end of the connecting rod (4) penetrates the bottom of the sealing box (5), the bottom of the connecting rod (4) is fixedly installed with a clamping block (41), the middle position of the impeller (3) is fixedly installed with a shaft rod (31), the upper end of the shaft rod (31) is provided with a clamping groove (32), the clamping groove (32) is matched with the clamping block (41) at the lower end of the connecting rod (4), and is clamped and connected, the top end of the shaft rod (31) is below the bottom of the sealing box (5); The upper end of the connecting rod (4) is fixedly installed with a transmission wheel (42), the upper and lower sides of the connecting rod (4) are fixedly installed with sealing rings (43), and the two sealing rings (43) are located above and below the sealing box (5) respectively.

2. An instrument seal assembly as claimed in claim 1, wherein: The outer ring of the bottom of the sealing box (5) is fixedly installed with a rubber ring (51), the upper surface of the rubber ring (51) is attached to the upper part of the inner cavity of the shell (1), the edge position of the sealing box (5) is fixedly installed with a following edge (52), and the following edge (52) covers the upper end edge of the shell (1).

3. An instrument seal assembly as defined in claim 1, wherein: The upper part of the sealing box (5) is provided with an end cover (6), the lower part of the end cover (6) is provided with a plurality of gears, the upper surface of the end cover (6) is provided with a plurality of scale tables, the gears and the scale tables on the end cover (6) are connected one by one, and the edge part of the end cover (6) is capped above the following edge (52) of the sealing box (5).

4. An instrument seal assembly as claimed in claim 1, wherein: The upper end and the lower end of the filter screen (2) are both installed with annular strips (21), the annular strips (21) are semicircular structures, the end parts of the two annular strips (21) at the same end are rotatably connected, and the filter screen (2) can be folded through the annular strips (21).

5. An instrument seal assembly as claimed in claim 1, wherein: The top of the shell (1) is covered with a shell cover (7), the shell cover (7) is threadedly connected with the outer top of the shell (1), the outer side of the upper end of the shell (1) and the outer side below the shell cover (7) are both fixedly installed with connecting parts (71), and the shell cover (7) and the connecting parts (71) of the shell (1) are fixedly connected through bolts.

6. An instrument seal assembly as defined in claim 1, wherein: The lower end of the shaft rod (31) penetrates the bottom of the filter screen (2) and is rotatably connected with the bottom of the inner cavity of the shell (1), and the transmission wheel (42) at the upper end of the connecting rod (4) is meshingly connected with the plurality of gears below the end cover (6).

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