RS20100367A2 - INJECTION SOCKET ASSEMBLY FOR DRAINING LIQUIDS FROM SANITARY ELEMENTS - Google Patents

Abstract

Invention herewith described refers to the inlet throat assembly for draining fluid in which the metal grille (1) is set into the screw-in socket (6) and fixed with its cams (4) set into the counter bores (5), and then their tips (4a ) are bent. The screw-in socket (6), together with the grille (1) is screwed in the inlet throat (7) forming a drain opening (13). The inlet throat (7) is integrally formed with the overflow conduit (14). On the conical surface (22) of the inlet throat (7) there is pulled the T-branch (25) with the thread (26) caught and fixed by the thread (23) of the nut (20). The nut (20) is with its thinned edges (21a) slidingly and inversely bedded into the groove (77) of the inlet throat (7). Projections (9) of the clamping adapter (8) are inserted into the holes (2) of the grille (1) along the cams (4) so that their lock pins (12) rest on the bent tips (4a), whereat the seal (11) is clamped between the clamping adapter (8) and the metal grille (1).

Description

Collapsible spout for draining liquids from sanitary elements

Technical field to which the invention relates

The invention belongs to the field of sanitary engineering and refers to elements for draining water from household installations such as bathtubs, showers, sinks, bidets, sinks and the like. Also, the invention relates to the field of connecting and sealing drainage pipes (rigid and flexible) with other sanitary elements.

According to the International Patent Classification (IPC) the invention is classified in class £ 03 C 1/22 which defines exhaust devices installed on wash basins, bathtubs or sinks. The invention can also be classified in class F16 L 33/24, which defines means for connecting hoses with rigid parts, the outer part of which consists of segments that are attached to the hose by means of wedge elements.

Technical problem

The technical problem that is solved by this invention consists in how to constructively solve the assembly of the inlet nozzle for draining liquid from sanitary elements, in order to enable the metal grid to be attached to the sanitary element, draining the remaining liquids inside the sanitary element, sealing at the point of connection of the sanitary element with the flexible pipe as well as with the pipe made of rigid thermoplastic mass and solved the problem of clogging of the sanitary element.

State of the art

Known in the state of the art and widely used are plastic spigots that are clamped together with the seal to the sanitary element by means of a special adapter - a screw-in extension, which is also made of thermoplastic material. Since the screw extension is cylindrical, it is necessary to provide a place on it where the clamping adapter will be mounted. The clamping adapter transmits the necessary torque so that the screw-on extension can properly clamp the inlet nozzle and the sealing element through it. After connecting the drain elements, the clamping adapter is stored for possible later use. When tightening with a clamping adapter, the plastic screw-in bit can be damaged, and in order to make it stronger, the screw-in bit is often made of expensive technical plastic (ABS or similar) or an additional metal grid is attached to it in order to allow greater force to be transmitted when tightening the screw-in bit and the inlet for the sanitary element. Also, the metal grid is very often installed as an aesthetic requirement.

US Patent US 2,827,639 shows a possible connection of a metal grid and a screw-on bit. The metal grid is bent around the plastic screw-in extension, thus making an inseparable connection. The disadvantage of this solution is the thickness of the joint at the bending point, which is two sheet thicknesses plus the thickness of the plastic screw attachment at the point of connection with the metal grid. This deficiency affects the easier retention of small waste at the point of contact between the metal grid and the sanitary element. The next drawback is the presence of a sharp edge on the underside of the metal grid. This edge is created when the grid is bent around the screw attachment. A sharp edge due to the screwing of the grating can cause damage to the sanitary element and also creates unnecessary additional resistance during screwing. Furthermore, in order to perform bending, the metal grid must have a larger diameter than the final diameter after joining the plastic support, which has the negative effect of increasing the consumption of the material used to make the metal grid. Finally, when tightening the grid, which is necessary for the proper tightening of the sealing rubber between the inlet and the sanitary element, relative movement (slippage) between the metal grid and the plastic support of the grid can occur.

American patent US 5,692,248 shows another method of attaching a metal grid with a screw-on attachment. The metal grid has two or more metal fins mounted on the outer circumference, the ends of which are bent upwards. The metal springs are flexible, which enables mounting and dismounting of the grid on the screw-in extension. The disadvantage of this solution is the relatively large number of component parts of the grid (at least 3), which complicate both the production and the assembly of the grid as a final product. If the metal feathers are attached with rivets, as the inventor has shown in one of the variant solutions, the complexity of the product is further increased. Also, this type of assembly requires a relatively large accommodation space in the opening of the sanitary element, and therefore the maximum achievable liquid flow that the metal grid can accept is significantly reduced.

For almost all sanitary elements in households, it is necessary to provide an overflow hole that ensures liquid drainage if the main drain is closed for some reason and there is a constant inflow of new liquid that must be drained so that liquid does not spill out of the sanitary element. Some of the sanitary elements have an integral overflow opening (cast in the ceramic itself - for example a bidet or a sink), while in others it is necessary to provide an overflow opening on one of the drainage adapters (as a rule, on the spout), which are subsequently installed on the sanitary element.

A typical example of spigots for sanitary elements with an integrated overflow is shown in US patent US 3,680,153. The screw-in extension has several openings in the circumference, which are located at the level of the integral drain of the sanitary element. The place of the sealing element on the inlet neck is lower than the bottom edge of the opening, which after using the overflow opening causes the drainage liquid to lag between the bottom edge of the overflow openings on the screw-in extension and the sealing element on the inlet neck. Residual liquid favors the development of bacteria that cause the spread of unpleasant odors as well as possible infections.

Joints between elements used to drain waste liquids are critical in terms of tightness. The connection is usually made with a rubber or elastic thermoplastic seal. Sealing must be achieved both between rigid and between rigid and flexible drainage elements.

It is well known that the sealing of the compositions of rigid elements in oil hydraulics is achieved by the tight conical fit of the connecting elements. Clamping is achieved with a screw connection. In order to achieve proper sealing, clamping forces are necessary, which can only be achieved with the help of an additional tool. In order to be able to seal correctly with a small clamping force, i.e. by hand, solutions are mainly used where the conical sealing element is made of an elastic - easily deformable material (for example soft PVC or low density polyethylene) and the connecting elements are cylindrical (of rigid thermoplastic - for example polypropylene), where one connecting element has an external thread and the other connecting element is smooth. First, a clamping nut is put on the cylindrical adapter, then a thin rigid plastic ring and a conical sealing element is attached to it. The cylindrical element having an external thread is threaded onto the conical sealing element by means of a clamping nut. A thin rigid plastic ring between the conical sealing element and the clamping nut serves to prevent the elastic conical sealing element from twisting due to the frictional force generated when the nut is tightened. This type of joint is very effective, but requires the use of additional elements (conical sealing element and plastic ring) that make assembly difficult and make the final product more expensive. A rigid ring can be avoided by performing a radial outlet directly on the cylindrical element, so the nut is mounted by pulling it over the integral radial outlet. As the smallest diameter of the nut is smaller than the diameter of the radial outlet on the sealing element, a significant force is required to tighten the nut, which is achieved with a special tool, or the nut is tightened immediately after ejection from the thermoplastic injection tool, while it is still hot and flexible. Both methods of mounting the nut are significant limiting factors that should be avoided.

The sealing of the composition between the rigid and flexible element for draining the waste liquid into the sewer is achieved in practice somewhat simpler. The flexible drainage element (or flexible pipe) is made of elastic thermoplastic, and the outer side is reinforced with a coil of solid thermoplastic (most often hard PVC). The solution for sealing such a joint is shown in the French patent application FR 2,712,371. The nut is screwed over the outer - spirally shaped wall of the elastic tube. The nut is made with a slightly smaller pitch of the coil than the flexible tube, which during tightening causes "creasing" of the inner wall of the tube, which further increases the insurance against the tube falling from the cylindrical adapter. During a longer period of passage of a warmer liquid (for example, hot water from the sink), the flexible pipe may expand and then fall from the adapter and the content of the flexible pipe may spill into the space under the sanitary element. Also an important drawback is the folds due to the compression of the flexible tube caused by the difference in the pitch of the coil on the tube and the nut. These folds, being spiral in shape, allow liquid to leak, thus losing the sealing of the joint.

Presentation of the essence of the invention

The spigot assembly consists of a metal grid, a plastic screw-on fitting, a spigot, a gasket, a clamping adapter with its own gasket, a drain nut, an overflow nut, a flexible drain pipe (or a rigid adapter or T-fork).

According to the invention, the metal grid is firmly connected to the screw attachment by means of two or more pins formed during the process of forming the metal grid. The inlet together with the screw-on extension forms a drainage overflow line. The drain and overflow of the inlet have conical ends for a secure seal with the attachment elements. The drain nut, as well as the overflow nut, are made at one end with elastic springs that are pulled over the conical end of the inlet neck or some other adapter. By means of the same nut and with the clamping force achieved by the installer's hand, both the flexible pipe and the T-bowl, which has a coil of the same pitch as the flexible pipe, are connected with a spiral connection. The sealing point on the T-fork is made in the form of a thin conical beginning, the shape of which, when tightened, adapts to the shape of the cone on the inlet neck.

The advantage of this invention compared to existing solutions is the existence of vertical feathers on the metal grid that protect the screw extension during installation and use of the clamping adapter, prevent the metal grid with the screw extension from slipping when clamping for the inlet nozzle and ultimately reduce the required amount of material for the production of the metal grid. The next advantage is contained in the design of the drainage line and openings that prevent the creation of unpleasant odors by preventing the retention of liquid inside the inlet after the liquid flow has stopped through the overflow opening on the sanitary element. In addition to the above, the advantage is also the elastic springs, formed on the nuts of the joints, which prevent the elastic tube from falling off the adapter and ensure easy assembly without the use of additional accessories and time conditioning of the assembly (the nuts do not have to be hot to be elastic when mounting on the conical ends of the adapter). Furthermore, the conical thin-walled end of the T-fork enables safe sealing even when tightening by means of a threaded connection whose coil pitch is several times greater than the standard design of conical sealing of sanitary elements made of rigid plastic mass. This design also enables the binding and sealing of both elastic pipes and rigid elements and only rigid elements. Finally, the conical ends made directly on the sanitary adapters (spout, outlet, T-fork, etc.) eliminate the need for a larger number of components at the sealing points.

Brief description of the drawings The invention is described in detail on the examples of execution shown in the drawing in which: Figure 1 - shows the section A-A from Figure 2, the assembly of the inlet nozzle, according to the basic

execution variants;

Figure 2 - shows a horizontal projection of the inlet throat assembly;

Figure 3 - shows a vertical section of the inlet nozzle assembly, according to variant I;

Figure 4 - shows a vertical section of the inlet nozzle assembly, according to variant II;

Figure 5 - isometric view of metal grid 1;

Figure 6 - represents a partial cross-section of the isometric view of the threaded attachment

according to the basic variant;

Figure 7 - is a partial cross-section of the isometric view of the threaded attachment

according to variant I;

Figure 8 - represents a vertical section of the isometric view of the inlet

according to the basic variant;

Figure 9 - represents a partial section of the isometric view of the T-fork;

Figure 10 - represents a partial section of the isometric view of the nut;

Detailed description of the invention

As shown by the example of the design of the inlet nozzle assembly for liquid drainage, according to the basic variant of the design (Fig. 1), the metal grid 1 (hereinafter referred to as the grid) is made with several openings 2 for the passage of liquid to be drained. All openings 2 have outlets 3 downwards so that the grid 1 is as rigid as possible. Feathers 4 (most clearly shown in Figure 5) were formed on each of the openings 2 by the deformation process. The number of fins 4 can be less than the number of holes 2. After the punching and deformation phase during the production of the grid 1, the fins 4 do not have the final bent end 4a. The feathers 4 are placed in the recesses 5 of the screw attachment 6 (shown in Figure 6). After placing the grid 1 inside the screw-in extension 6, in a special tool, the springs 4 are deformed and their bent ends 4a are formed, which creates a solid connection between the grid 1 and the screw-in extension 6. The screw-in extension 6, together with the grid 1, is clamped to the inlet 7 by dropping 9 of the clamping adapter 8 into the insert and resting on the bent sides 3 of the openings 2 made on grids 1 which is obtained

a support is needed to transmit the torque by hand through the eyelet 10 of the clamping adapter 8.

In order to prevent slippage between the metal grid 1 and the screw attachment 6 during clamping with the clamping adapter 8, the springs 4 rest laterally on the recesses 5 of the screw attachment 6. It is clear that the recesses S can have different geometric shapes and positions than those shown

in Figure 5 with the condition that the possible sliding of the grate 1 in relation to the screw attachment 6 is blocked. A sealing rubber 11 is placed on the clamping adapter 8, so in addition to clamping, it also closes the flow of liquid through the inlet 7. Therefore, the clamping adapter 8 is also used as a plug that enables the filling of the sink. In order for the rubber band 11 to perform a safe sealing, the position of the clamping adapter 8 inside the grid 1 is fixed by the fuses 12 that are formed on the outlets 9. When inserting the outlet 9 of the clamping adapter 8, the fuses 12 flex elastically towards the axis of the clamping adapter 8 and slide vertically along the feathers 4 of the grid 1 until they finally spread and rest on the bent end 4a of the feather 4, which the fixed position of the sealing rubber 11 is ensured. As the fuses 12 of the clamping adapter 8 slide on the metal springs 4, there is no possibility of damage to the plastic screw-in attachment 6.

Figure 3 shows the assembly of the inlet nozzle for draining the liquid, according to variant I, with the screw-in attachment 6a, where instead of the recess S (at the screw-in attachment 6), there are centrally connected ribs 18 (shown in Figure 7). The vertical outlets 3 of the openings 2, which are located on the grid 1, rest on the vertical sides of the central ribs 18 of the screw attachment 6a. The difference compared to the solution shown in Figure 1 is the possibility of transmitting a greater torque when tightening the grid 1, firmly attached to the screw extension 6a, and the inlet nozzle 7

because in this case there is a larger support surface between the vertical outlets 3 of the opening 2 of the grid 1 and the central ribs 18 of the screw attachment 6a than between the tongue 4 of the grid 1 and the outlet S of the screw attachment 6 shown in the basic design in Figure 1.

Looking again at Figure 1, when tightening the seal 15 and the sanitary element (shown by dashed lines), the screw extension 6 and the inlet 7 form a drainage opening 13, the permeability of which is many times smaller than the overflow line 14. The dimensions of the screw extension 6 and the inlet 7 are determined so that in the case of any sanitary element, the drainage opening 13 never completely closes after tightening the screw extension 6 with inlet nozzle 7. The role of the drainage hole 13 is to prevent the retention of liquid inside the inlet nozzle assembly after the cessation of the flow of new liquid through the overflow line 14 on the inlet nozzle 7. After closing the flow of liquid through the holes 2 of the grid 1 with the seal 11 of the clamping adapter 8, the liquid level in the sanitary element is raised to the overflow opening (not shown) and from there it is drained by a flexible pipe or a rigid drain elements implements to of the overflow line 14 of the inlet 7. Due to insufficient flow through the drainage opening 13, the liquid level rises inside the inlet assembly until it reaches the overflow openings 16 on the threaded extension 6, after which, by further raising the liquid level, it overflows and drains the liquid into the sewer. After the liquid inflow through the overflow line 14 stops, the level of liquid inside the inlet nozzle assembly drops and, flowing down the steep drain 17 of the inlet nozzle 7, goes through the drainage opening 13 into the sewer, which avoids retention of liquid inside the inlet nozzle assembly. As the assembly of the inlet neck remains practically dry after the inflow of new liquid has stopped, there is no fear of the creation of unpleasant odors.

Figure 4 shows the assembly of the inlet for draining liquid, according to variant II, in the case of a sanitary element (shown with broken lines) that has an integral overflow line (eg sink, bidet). In this case, the screw-in extension 6b is longer than the screw-in extension 6 in order to bridge the greater thickness of these sanitary elements compared to, for example, sinks or bathtubs that do not have integral overflow pipes. Also, the inlet 7a now does not have the overflow line 14 that contains the inlet 7 because the sanitary element has an integral overflow line. After the liquid flow stops through the integral overflow line of the sanitary element, the liquid level drops as it is removed through the drainage opening 13, which does not allow the retention of liquid inside the inlet assembly as well as in the space above the seal 15 and below the opening 16 of the screw attachment 6.

Looking at Figure 4, among other things, the connection of the inlet 7a, the flexible pipe 19 and the nut 20 is shown. The nut 20, shown in more detail in Figure 10, has several elastic outlets 21 on its inner circumference, which are arranged radially towards the center of the nut 20 and which on the inside have tapered ends 21a in the form of elastic fins. The spigot 7a has an integral sealing conical surface 22, the beginning of which is made with a beveled edge so that the flexible tube 19 is easier to position during the assembly of the spigot assembly. During assembly, the nut 20 is pulled over the conical surface 22 of the inlet nozzle 7a, whereby the supports 21 are elastically deformed. At the end of the threading stroke of the nut 20 over the conical surface 22 of the inlet nozzle 7a, the elastic deformation is released and the supports 21 of the nut 20 return to their original position (shown in Figure 10), thus making an inseparable connection between the nut 20 and the inlet nozzle 7a, whereby the nut 20 can rotate freely around its central axis without any resistance. The dimensions of the elastic supports 21 of the nut 20 as well as the conical surface 22 of the inlet nozzle 7a are determined so that the assembly of the nut 20 and the inlet nozzle 7a is accomplished by hand, without the use of additional accessories or devices. The nut 20 contains a coil 23 on its inner circumference. The flexible pipe 19 is guided during assembly to the beginning of the conical surface 22 of the inlet nozzle 7a, while rotating the nut 20 further pulls the flexible pipe 19 onto the conical surface 22 of the inlet nozzle 7a. The flexible pipe 19 is pulled until the conical surface 22 of the inlet 7a is completely covered by the flexible pipe 19. By elastic deformation of the inner diameter of the pipe 19 over the conical surface 22 of the inlet 7a, the joint is waterproof. Since the pipe 19 is elastic, when it is pulled by means of the nut 20 onto the conical surface 22 of the inlet nozzle 7a, due to stretching, the pitch of the coil 24 may increase in relation to the pitch of the coil 23 of the nut 20, which causes the tube 19 to wrinkle on the conical surface 22 of the inlet nozzle 7a and thus to the loss of the waterproofness of the joint. In order to prevent this phenomenon, the coil 23 of the nut 20 is made with a slightly larger pitch (recommended up to 10%) than the pitch of the coil 24 of the flexible tube 19.

Figure 1 shows the method of connecting and sealing the rigid elements of the inlet nozzle assembly, where a T-fork 25 (or some other adapter made of rigid plastic) is pulled over the coil 26 through the coil 23 of the nut 20, instead of the flexible pipe 19, onto the conical surface 22 of the inlet nozzle 7.

Method of industrial application of the invention

Therefore, the invention is successfully applied both for sealing rigid and elastic as well as for sealing only rigid elements for draining water into the sewer.

The elastic deformation during the connection of standard rigid drain elements in sanitary facilities is insignificant, and watertightness cannot be achieved by an elastic overlap of the standard rigid drain element with the conical surface 22 of the inlet nozzle 7, as in the previously described case of sealing the flexible pipe 19. How would the tightening force of the nut 20 be required, when pulling the T-fork 25 onto the conical surface 22 of the inlet nozzle 7 and achieving watertightness joint, was insignificant and easily achieved by hand, the T-fork 25 is made with a thin tongue 28. The thin tongue 28 is made cylindrical or with a smaller angle of its inner conical surface in relation to the angle of the conical surface 22 of the inlet 7. When the T-fork 25 is tightened with the nut 20 on the inlet 7, the thin tongue 28 of the T-fork 25 elastically deforms and takes surface cone angle 22 inlet 7, which made the joint watertight. The inner conical surface 27 of the T-fork is made with the same angle as the conical surface 22 of the inlet nozzle 7 so that, during clamping, the central axis of the T-fork is positioned coaxially with the central axis of the inlet nozzle 7. The thickness of the wall of the tapered tongue 28 of the T-fork 25 is determined so that its elastic deformation during the connection of the T-fork 25 and the inlet nozzle 7 is easily achieved by manually tightening the nut 20. As the T-fork 25 is made of a rigid plastic mass, the pitch of the coil 26 when pulling the T-fork 25 onto the conical surface 22 of the inlet 7 remains practically unchanged and for this reason there is no need to be different in relation to the pitch of the coil 23 of the nut 20. The coil 26 of the T-fork 25 must not be on any of its parts on the thinned feather 28 and should start dark where it ends thinly feather 28 (best shown in Figure 5) so that during the cooling of the plastic mass at the points where the walls are joined, there would be no drying out after injection molding, which could further lead to the loss of watertightness at the contact of the thinned feather 28 of the T-fork 25 and the conical surface 22 of the inlet 7.

Claims (4)

1. Assembly of the inlet nozzle for draining liquids from sanitary elements, according to the basic variant, characterized by the fact that the metal grid (1) is placed in the screw-in nozzle (6) and attached with its springs (4) which are placed in the recesses (5), and then their ends (4a) are bent, which is that the screw-in nozzle (6), together with the grid (1), is twisted over the thread in the nozzle nozzle (7), forming a drainage opening (13), which is inlet (7) integrated with overflow water (14), which is a T-fork (25) pulled onto the conical surface (22) of the inlet (7), the coil (26) of which is gripped and fixed by the coil (23) of the nut (20), which with its tapered ends (21a) is slidably and rotatably seated in the groove (77) of the inlet (7). 2. Assembly of the inlet nozzle for draining liquids from sanitary elements according to variant I and claim 1, characterized by the fact that the metal grid (1) is placed in the screw-in extension (6a) and its outlets (3) of the opening (2) rests on the vertical sides of the central ribs (18) of the screw-in extension (6a); 3. Assembly of the inlet nozzle for draining liquid from the sanitary elements according to variant II and claim 1, indicated by the fact that the screw extension (6b) is twisted into the inlet nozzle (7a) which is made without an overflow line (14), forming a drainage opening (13), which is a flexible tube (19) which is pulled onto the conical surface (22) of the inlet nozzle (7a) whose coil (24) is attached coil (23) nuts (20). 4. The assembly of the inlet nozzle for draining liquid from the sanitary elements according to claim 1, characterized by the fact that the outlets (9) of the clamping adapter (8) are inserted into the openings (2) of the grid (1) along the feathers (4), so that their fuses (12) rest on the bent end (4a), while the seal (11) is clamped between the clamping adapter (8) and the metal grid (1).