KR101146716B1 - stainless steel dry single-jet type apparatus of watermeter and the manufacturing process - Google Patents

Abstract

The present application relates to a single-stage water meter provided using a lower outer shell of stainless steel.

Water meter provided herein is the flow path of the inlet and outlet of the lower outer shell is positioned so as to be biased to one side from the center of the lower outer shell is made smoothly rotated, the pivot of the rotor is the pivot of the rotor at the bottom of the center of the lower outer shell It is formed, and the blade car is inserted into the pivot to be rotated to the upper portion, and the lower outer shell is made of a structure that the tight spring is fitted after the blade and the upper outer shell is raised, the upper outer shell is equipped with an O-ring on the outer surface It has an O-ring groove to make the O-ring groove, the O-ring groove is provided on the lower locking jaw formed on the inner wall surface of the lower outer shell to form a watertight structure. The upper outer shell is fitted into the spring groove formed in the upper outer shell to be fixed inside the structure, the upper portion of the rotor by the magnetic force Disclosed is a technical idea of a stainless steel single-gap water meter having a structure in which an electronic indicator for sensing and measuring a flow rate is mounted to be engaged with a lower outer shell.

Stainless steel, single-acting water meter,

Description

Stainless steel dry single-jet type apparatus of watermeter and the manufacturing process

The present invention relates to a single-stage water meter, and more specifically, a vacuum-integrated casting method and an insert method are obtained in parallel to obtain a lower outer shell of a stainless steel single-sided water meter. It relates to a single-ended water meter of stainless steel to be connected.

The present application is made of brass, which is an alloy mainly comprising copper (CU) and zinc (ZN), or bronze, which is an alloy mainly containing copper (CU) and tin (SN). The castings made of these products are made of brass and bronze products. It is confirmed that these brass or bronze castings contain trace amounts of lead and antimony, which are harmful to humans. The invention has been made in the process of finding a manufacturing method for increasing the production efficiency and reducing the occurrence rate of defects more than the conventionally disclosed method, and has a problem to provide a stainless steel meter water meter article.

In order to perform the meter reading function of a conventional water meter, in order to obtain a circular core having a complex internal core structure such as tap water inlet, outlet groove, inlet partition wall, outlet partition wall, and meter support supporting jaw, I made a water meter model. Round wax with complex internal core structure by melting and pouring urea (NH2CONH2) into the model frame to obtain urea core primarily, and injecting wax outside the urea core to wrap urea core and melting and separating urea components Due to the complicated manufacturing process of obtaining products, it has lost its competitiveness as a labor-intensive industry. Currently, most of the facilities are moved to China or Southeast Asia, produced in low-wage countries, and imported into Korea.

Applicant to the prior application registration No. 0683821 confirms that harmful substances are detected in the conventional water meter to be used to make a half-sided split mold rather than a circular core as a method of manufacturing a water meter of stainless steel material, 1 / 2 Inject the semi-solid wax into the mold mold at high pressure, and have the desired thickness and strength, and the structure of the tap water inlet, outlet groove, inlet partition wall, outlet partition wall, and meter support base, etc. It is possible to carry out casting process with complex internal core structure easily by the innovative method of obtaining the injection molded product by making the half-split wax model, and the half-waxed injection molded product by joining the symmetrical structure with each other. It has been used to suggest a new method for improving production efficiency.

However, even in the above method, the circular wax core for the water meter should be precisely processed to a thickness of 1.5 to 2.5 mm, more preferably 1.8 to 2.0 mm, and the defect rate is generated at the slurry casting step of the circular wax product, resulting in higher strength. There was a need for a method for obtaining a circular wax core.

In the present invention, there is an object of providing a stainless steel single-acting water meter as a manufacturing method for increasing the production efficiency and reducing the defect rate more than the conventionally disclosed method.

The present application improves the problem that lead and antimony components, which are harmful to humans, are detected in conventional brass or bronze water meters, and is a stainless steel casting water meter product made of SUS 304 or 316 which is free of harmful components. It is an object of the present invention to provide a stainless steel single-gap water meter having a structure in which an electronic indicator that measures the flow rate by detecting a rotation of a blade wheel that rotates inside the lower outer shell by a magnetic force is lifted and fastened to the upper upper outer shell.

For another purpose, the electronic indicator of the water meter of the present application can inform the meter reading through the remote indicator in connection with the remote indicator and wired / wireless, and support for sapphire material on the support that holds the central axis of the vane at the center of the upper outer shell. It is an object of the present invention to provide a stainless steel single-gap water meter having a structure in which a groove is provided to prevent frictional wear.

The present disclosure discloses a means for obtaining a stainless steel short-acting water meter for improving production efficiency and reducing a defect rate more than the conventionally disclosed method for obtaining a water meter.

In the present application, first, a mold for obtaining a circular wax core having a thickness in the range of 1.5 to 2.5 mm as a means for obtaining a circular wax core having the same shape / shape as a single-step water meter and an external mold frame having a half-divided structure is a wax injection means. It is provided with, but the first step is provided in the outer mold is provided with a central insertion hole and the insert insertion hole; A second step of inserting a cylindrical central inserting hole inserted into the central inserting hole of the outer mold into an inner mold for inserting the insert inserting hole into the outer mold; A third step of inserting the insert inserting hole inserted through the insert inserting hole of the outer mold into the inner hole of the insert inserting hole prepared in the second step process; A fourth step of forming a circular wax core having the shape and shape of a monotonic water meter by injecting wax through the wax inlet after the third step process is completed; The purpose of the present application is to obtain a circular wax product through a process including a method, and to obtain the lower outer shell of a monotonic water meter provided by a stainless alloy of SUS 304/316 using a known lost wax method. It is confirmed that the present invention can be achieved.

Therefore, the short-deck type water meter composed of the stainless steel material, which is made of the stainless steel material, includes the electronic indicator of the synthetic resin material on the upper outer shell and the upper outer shell. Positioned so as to be biased from one side of the center of the carapace is smoothly rotated, the lower portion of the center of the lower outer shell is formed a pivot that is the axis of rotation of the rotor, the upper blade is provided to be rotated by being inserted into the pivot, Inside the lower outer shell is formed a structure in which the tight spring is fitted after the blade and the upper outer shell is raised, the upper outer shell has an O-ring groove for mounting the O-ring on the outer surface, the lower outer in the form of the O-ring groove It is provided to form a watertight structure by being mounted on the lower locking jaw formed on the outer surface of the central part of the instep, A pring is inserted into a spring groove formed at the bottom of the upper catching jaw of the lower outer shell to form a structure in which the upper outer shell is fixed inside the lower outer shell. An upper portion of the lower portion is provided with an electronic indicator for measuring the flow rate by sensing the rotation of the blade car by magnetic force. Provided is a stainless steel single-gap water meter constituting the outer shell.

In addition, the electronic indicator of the water meter is connected to the remote indicator and wired / wireless is provided so that the meter can be read at the outdoor door or the corridor of the apartment through the remote indicator.

In addition, a support member for holding the central axis of the blade is provided at the center lower portion of the upper outer shell, but a sapphire material is provided in the center of the support to reduce friction and prevent abrasion, thereby preventing friction wear in numerous rotations of the blade. Includes technical thoughts.

The stainless steel casting single-acting water meter has a voice of concern that the conventional brass and bronze water meters can detect lead and antimony components, which are harmful to humans. It is effective in confirming that antimony ingredient is detected and replacing it with stainless steel product which is not harmful to human body.

It is harmful to modern people pursuing the well-being era by providing stainless steel water meter which secures economical and competitive power by developing the manufacturing process of our company, which has been searching for a method of applying this realistically because the process and cost of the conventional stainless steel casting process are high. It may have the effect of providing a product without fear of dissolution of the substance.

In the present application, the lower outer shell of the single-stage water meter of stainless steel is first obtained, and the single-array type of stainless steel which has an electronic indicator unit provided as an upper portion of the lower outer shell or a remote meter reading is connected wirelessly / wired with an external remote indicator. It will provide a water meter.

Hereinafter, the manufacturing process of the stainless steel short-soiled water meter lower outer shell provided with a lower outer shell structure of the short-acting water meter is provided to have an inlet and an outlet portion from the center of the lower outer shell to facilitate the rotation of the blade.

In the present application, a process for obtaining the lower outer shell of stainless steel castings is designed / manufactured by the designer (consumer) to obtain a circular wax product in the desired specification, but the shape and size of the single-acting water meter is 1.5 The first step in which a mold for obtaining a circular wax core having a thickness in the range of ˜2.5 mm is provided with a wax injection means, and an external mold frame having a ½ division structure is provided with a central insert hole and an insert insert hole. The central insertion hole of the cylindrical shape inserted into the center insertion hole of the outer mold is provided with an inner hole through which the insert insertion hole can be inserted into the side, and inserts into the outer mold. A third step of inserting the insert inserting hole inserted through the insert into the inner hole of the insert inserting hole prepared in the second step process; After the third step is completed, the new development process includes a step including a fourth step of forming a circular wax core having the shape and shape of a monotonic water meter by injecting wax through the wax inlet. The process of obtaining the lower outer shell provided by the stainless alloy of SUS 304/316 using the circular wax product obtained through is disclosed in detail in the applicant's patent application No. 0683821.

Embodiments to which the technical spirit is specifically applied will now be described in detail with reference to the accompanying drawings.

Figure 1 shows a short-sleeved water meter lower outer shell to be provided herein, Figure 1a is a perspective view of the lower shell of the single-acting water meter of the present application, Figure 1b is a top cross-sectional view thereof, Figure 1c shows a side cross-sectional view have.

The short-sleeved monotonic water meter of the present application has an inlet 1 through which tap water flows in and an outlet 2 through which the tap water flows, a central part 3 provided to have a space into which the tea is inserted, and a lower portion of the central part 3. Pivot 4, which is the axis of rotation of the blade car at the center of the bottom, a lower locking jaw 5a in which the upper outer shell is interpolated to the upper portion, and a spring provided so that the upper outer shell is interpolated to the upper portion of the lower locking jaw 5a and the tight spring is caught. The groove 6 is shown.

The flow path of the lower outer shell 20 inlet portion 1 and the discharge portion 2 of the short-sleeved water meter is positioned to be biased to one side from the center of the lower outer shell to smoothly rotate the vane 21 and the lower outer shell. A pivot 4 is formed at the lower end of the center portion 3 of the center 20 to form a pivot shaft of the vane 21. The vane 21 is fitted into the pivot 4 at the upper portion thereof, and the vane pivot is formed on the upper part of the vane 21. The blade car pivot 21a has a structure 21 fixed to the bottom of the upper outer shell and is provided to be rotated.

Figure 2 shows a process chart to obtain a short-acting water meter by vacuum precision casting method, in which the new process of the present application is applied in Figure 2 (A) to (C) process part and the rest (D) to ( I) process shows step by step the method disclosed in the applicant's patent application No. 0683821, step (A) to (C) will be described in detail with reference to Figs.

The present invention obtains a high strength round wax product that is not easily broken in the mold design and manufacturing step (A) and the wax model injection step (B), but provides an inlet and an outlet part effectively, speeding up the overall manufacturing process and freeing the loss of raw materials. It is to provide an economical manufacturing method.

FIG. 3 shows two upper and lower molds 10 and 10 ', a central insertion hole 11, insert insertion holes 12 and 12', and a wax injection hole 15 used in a process of obtaining a circular wax core mainly used herein. ), It is intended to more clearly show the process of obtaining a circular wax model shown in Figure 4 of the prototype.

Referring to Figure 3 describes the process of obtaining a circular wax product for the lower outer shell in the present application, the upper and lower molds for obtaining a circular wax middle having a thickness in the range of 1.5 ~ 2.5 mm in the shape and size of the monotonic water meter (10) 10 ') has a half-divided structure, and the upper and lower molds 10 and 10' overlap each other, and a mold mold 13 is provided. Up and down molds (10, 10 ') are provided in a structure having a semicircular groove (12').

After the upper and lower molds 10 and 10 'are overlapped and the mold frame 13 is provided, the central insertion hole 16 is inserted into the central insertion hole 11 of the central portion, and the insert insertion holes 12 and 12' of both sides are inserted. The insert insertion hole (17, 17 ') is inserted into the inner side, but the inner hole 14 through which the insert insertion hole can be inserted into both sides of the central insertion hole 16 is provided, the center insertion hole first into the mold frame (13) (16) is interpolated and the insert insertion holes (17, 17 ') are inserted through the insert insertion holes (12, 12') on both sides, and the end (17a) of the insert insertion holes (17, 17 ') is the center insertion hole ( The wax is injected into the mold frame 13 through the wax inlet 15 in the state inserted into the inner hole 14 of 16) to obtain a circular wax core having the shape and shape of a monotonic water meter.

4 is to explain the step-by-step working process in the configuration in which the upper and lower molds 10 and 10 'are closed and the central insertion hole 16 is located in the upper part of the apparatus of FIG. The upper mold 10 is located in front of the inside and the inside is not visible, but in the form of a perspective view in order to display the work order of the detailed step by step until obtaining a circular wax middle inside the mold frame 13, Figure 4a In the first, the central insertion hole 16 is prepared to be inserted in the upper portion of the mold 13, the upper and lower ends of the mold mold 13 so that the insert insertion holes (17, 17 ') can be respectively entered Insertion spaces are indicated by dotted lines on both left and right sides, and the mold frame 13 of the water meter designed to meet the specifications and specifications desired by the manufacturer is located at the center of the mold frame 13.

In addition, the central insertion hole 16 shows that the inner hole 14 is formed so that the end 17a of the insert insertion holes 17 and 17 'can be inserted after being inserted into the mold frame 13.

4B shows a state in which the central insertion hole 16 is inserted in the center upper portion of the mold 13, and FIG. 4C shows that the insert insertion holes 17 and 17 'are center insertion holes in both left and right sides in the state of FIG. 4B. It can be seen that the state inserted into the inner hole 14 of (16) is shown.

In the state of FIG. 4C, the insert insertion holes 17 and 17 'are functions for forming flow paths of the inlet and outlet of the lower outer shell of the water meter, respectively, and the central inserting hole 16 has a space in which the blade and the upper outer shell are embedded. After forming the state of FIG. 4C, wax is injected through the wax inlet 15 into the mold frame 13 as shown in FIG. A circular wax core shape is formed to form a space to be formed. At this time, the position of the wax injection hole 15 into which the injected wax is introduced into the mold frame 13 may be variously changed in any position of the left, right, or center part depending on the working environment. In addition, when the wax injection operation is performed, the inner space of the mold frame is combined to form a watertight structure without any other passage except for the wax injection hole.

4E shows the insert insertion holes 17 and 17 'drawn out first after the wax injection process is finished, and FIG. 4F shows the central insertion hole 16 drawn out from the insert insertion hole removed. As a result, a round wax core of the shape and size of a monotonic water meter having a thickness in the range of 1.5 to 2.5 mm is obtained.

After obtaining the wax model, after casting the lower outer shell of the stainless steel single-acting water meter using a conventional vacuum precision casting method, as a finishing work, a screw thread is formed at the inlet and outlet portions and a locking jaw is formed at the center. Cutting work such as forming and machining work to install the pivot at the bottom center of the central portion to complete the lower armor of the single-stage water meter of stainless steel as shown in FIG.

The lower armored water meter-type water meter lower outer shell of the stainless steel material prepared by the above process has a built-in vane (impeller) and an upper outer shell therein, and an electronic indicating portion is loaded thereon to complete the water meter of the present application.

Figure 5 is an exploded perspective view of the water meter showing the structure of the water meter provided by using a single-stage short water meter of the stainless steel material provided in the present invention.

A pivot 4 is installed at the center lower end of the lower outer shell 20 of the stainless steel water casting meter provided in the shape and shape of FIG. 1, and the impeller 21 is inserted into the pivot to rotate the impeller. 21 has a hole into which the pivot is fitted (lower), has four to six wings on the side, and has a blade car pivot (21a) at the top and is connected to the upper outer shell (22) at the top.

The upper outer shell 22 provided herein is provided with an O-ring groove 23a into which the O-ring 23 is formed to form a watertight structure on the outer surface thereof, and the support member 22a at the center lower end of the upper outer shell 22. It is provided in a structure having a bar structure of the upper outer shell 22 will be described in FIG.

An upper portion of the upper outer shell 22 is provided with a steel clamp spring 24 to be inserted into a spring groove 6 formed in the lower outer shell of the water meter to prevent the upper outer shell from rising upward by pressure. After the spring 24 is fitted, the meter reading unit 30 is positioned above the upper outer shell 22, and the upper cap 25 for coupling and fixing the meter reading unit with the lower outer shell 20 is fitted with the meter reading unit at the center. In the state, it is inserted into the rotating jaw (7) formed on the upper end of the water meter lower outer shell and is fixed by the fixing pin 26 shows a short-sleeved water meter.

At this time, it will be apparent to those skilled in the art that the technique for fixing the meter reading unit to the lower outer shell of the water meter using the upper cap 25 and the fixing pin 26 can be modified in any number of ways.

Therefore, the stainless steel lower outer shell 20 of the present application forms a structure in which the tight springs 24 are fitted after the blade 21 and the upper outer shell 22 are raised, the upper outer shell 22 on the outer surface It has an O-ring groove 23a for mounting the O-ring 23, and is mounted on the lower locking jaw 5a formed on the center outer side of the lower outer shell 20 in the form of inserting the O-ring 23 in the O-ring groove 23a. It is provided to form a watertight structure, the upper outer shell 22, the upper spring 22 is fitted into the spring groove 6 formed in the bottom of the upper locking jaw (5b) of the lower outer shell 21, the upper outer shell 22 is lower It may be provided in a structure fixed inside the outer shell 20.

6a and 6 are perspective views for showing the inner surface of the upper outer shell 22 of the present application, the rotor wheel pivot 21a is provided with a support member 22a at the center of the bottom surface of the upper outer shell 22 at the center axis end of the blade. In connection with the rotation, the support member 22a is provided with a support groove 22b made of sapphire (Al ₂ O ₃ ) material at the center of the support member 22a to reduce frictional wear caused by numerous rotations of the blade. It indicates that the blades of the rotor pivot (21a) and the central axis can be provided in a structure that is rotated.

Figure 7a is an assembly perspective view of the water meter completed by assembling all the water meter parts shown in Figure 5, the measurement structure of the water meter provided herein to measure the number of revolutions by detecting the rotation of the permanent magnet attached to the blades / The configuration of counting mechanically and electronically is already known in the art, but in the present example, an example is illustrated that the meter can be metered externally by transmitting a measured value linked with a wired / wireless means between the water meter electronic indicator and an external remote indicator. to be.

Generally, the water meter is buried or hidden in the state of being buried or concealed considering that it is difficult to observe because it is mostly buried in the basement or the bottom of the sewer of the kitchen and wrapped in a heat insulating member to prevent freezing. Even if you do not pick up the measuring part of the meter, you can check the value of the meter by providing a remote water meter in the hallway without entering the room through the remote indicator installed on the ground or in the apartment structure.

1 is a block diagram showing the structure of the lower outer shell of the single-acting water meter.

2 is a process chart showing a manufacturing process of a single-acting water meter.

3 is a perspective view showing a wax model manufacturing apparatus.

Figure 4 is a detailed process of the wax model injection step.

5 is an exploded perspective view of the water meter.

6 is a perspective view showing the configuration of the upper outer shell.

7 is an exemplary diagram connecting a water meter and a remote indicator.

******** Description of the main signs in the drawings ********

1: inlet 2: outlet

3: center part 4: pivot

5: engaging jaw 6: spring groove

7: rotating jaw 10: mold

11: center insertion hole 12: insert insertion hole

13: mold 14: inner hole

15: wax inlet 20: lower outer shell of the water meter

21: Impeller 22: Upper outer shell

23: O-ring 24: Tight spring

25: upper cap 26: fixed pin

30: electronic indicator 40: remote indicator

Claims (4)

In the manufacturing method of the lower outer shell of stainless steel single-stage water meter, The mold 10 for obtaining a round wax core having a thickness in the range of 1.5 to 2.5 mm in the shape and size of a short-deck type water meter is provided as a mold frame 13 having a ½ division structure with wax injection means. 13, a first step in which the central insertion hole 11 and the insert insertion holes 12 and 12 ′ are provided and provided; The cylindrical central insertion hole 16 inserted into the central insertion hole 11 of the mold 13 has an inner hole 14 through which an insert insertion hole can be inserted into the mold part 13 and inserted into the mold 13. Step 2; A third step of inserting the insert insertion hole inserted through the insert insertion holes 12 and 12 'of the mold 13 into the inner hole 14 of the central insertion hole 16 provided in the second step process; A fourth step of forming a circular wax core having the shape and shape of a monotonic water meter by injecting wax through the wax inlet 15 after the third step process is completed; The method of manufacturing a short-soiled water meter lower outer shell, characterized in that to obtain a circular wax product through a process comprising a and obtain a lower outer shell provided by a stainless alloy of SUS 304/316 material using a known lost wax method. delete delete delete

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