Upper valve member

Abstract

A valve upper member provided with a head piece (1), the head piece (1) being penetrated at the center by a main shaft (2), and a valve body (3) that is applied to a valve seat (61) of a housing (6) being operable via the main shaft (2), a sealing device being arranged between the valve body (3) and the valve seat (61), the sealing device comprising a sealing ring (5), the sealing ring (5) being in contact with a disk (4) having a hole (41), the disk (4) being arranged on a mounting mandrel (35) of the valve body (3) by means of the hole (41), and at least two flow openings (42) being arranged on the disk (4) so as to be radially spaced apart from the hole (41) and spaced apart from each other over the entire circumference, the valve upper member.

Description

Technical Field

[0001] The present invention relates to an upper valve member provided with a headpiece, the headpiece being centrally penetrated by a main shaft, and a valve body that can be operated to be applied to a valve seat of a housing via the main shaft. A sealing device is arranged between the valve body and the valve seat, the sealing device includes a sealing ring, the sealing ring is in contact with a disk having a hole, and the disk is arranged on a mounting mandrel of the valve body, preferably substantially cylindrically formed, with the hole.

Background Art

[0002] Such an upper valve member is known from British Patent Application Publication No. 2137736. This known upper valve member is used to control the outflow of a medium from a fluid device. For this purpose, the upper valve member is screwed into the housing of the fluid device by its headpiece. A rotation grip or lever is attached to the main shaft of the upper valve member. To control the flow rate, a valve plunger that is linearly movable inside the headpiece via the main shaft is provided. A disk is attached to this valve plunger to seal the valve seat. This disk is attached to the valve plunger via a nut or an integrally formed umbrella head and has a hole. This hole enables backwashing of the disk. Thereby, the disk and the sealing ring surrounding this disk are pressed against the valve seat.

[0003] The already known upper valve member has the disadvantage that it is extremely time-consuming to manufacture and assemble the disk. Additional working steps are required for machining the holes required for backwashing. This working step impairs the process progress during mass production of such an upper valve member.

[0004] To eliminate this drawback, German Utility Model No. 202008014555 proposes providing a through-passage configured such that at least one flow-through opening is formed between the mounting mandrel and the disk instead of a hole. This structurally simple solution has proven to be actually suitable. Nevertheless, it has been found to be a drawback that water stoppage occurs in the intermediate chamber between the disk and the valve body, which causes deposits or contaminants to occur.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Here, the present invention provides a solution. The underlying problem of the present invention is to improve the valve upper member in the form described above so that the production and assembly of the disk are simplified and water stoppage between the disk and the valve body is effectively prevented. According to the present invention, this problem is solved by the features of the characterizing part of claim 1.

Means for Solving the Problems

[0006] The present invention provides a valve upper member that simplifies the production and assembly of the disk and effectively prevents water stoppage between the disk and the valve body. Flow-through is achieved by arranging at least two flow-through openings on the disk that are radially spaced from the hole and spaced from each other over the entire circumference. This avoids water stoppage.

[0007] In an improved form of the present invention, an annular spacer surrounding the hole is integrally formed on the side of the disk closer to the head piece. This avoids the disk being attached to the valve body during fixation, which would prevent backwashing of the disk. The stepped portion enables continuous backwashing of the disk. Advantageously, the spacer has an outer peripheral surface formed in a frustoconical shape.

[0008] In the configuration of the present invention, the bottom side of the flow-through opening formed in a trapezoidal shape is formed in an arc shape, and this bottom side is located on two virtual arcs arranged concentrically with each other. As a result, vortex movement inside the intermediate chamber between the valve body and the disk is achieved, thereby assisting continuous water exchange. Preferably, the flow-through openings are formed in the same shape as each other.

[0009] In a further configuration of the present invention, the bottom sides of two adjacent trapezoidal flow-through openings are wider than the mutual interval between the flow-through openings when viewed in the circumferential direction (that is, the direction surrounding the mounting mandrel over the entire circumference). As a result, water flow inside the intermediate chamber between the valve body and the disk is maximized.

[0010] In a further configuration of the present invention, two adjacent flow-through openings define one substantially square web each. In this case, preferably, two concentric annular bodies are formed by the flow-through openings, and these two annular bodies are preferably connected to each other via a plurality of webs evenly arranged over the entire circumference. As a result, improved water vortex movement inside the intermediate chamber between the valve body and the disk is achieved, thereby further assisting water exchange.

[0011] In an improved form of the present invention, the inner annular body transitions to a sleeve-shaped connecting piece that protrudes axially in the opposite direction to the valve body from the outer annular body. As a result, axial positioning aligned with the inner annular body becomes possible. Advantageously, the inner annular body transitions to an annular spacer that protrudes axially in the opposite direction to the valve body from the outer annular body.

[0012] In the configuration of the present invention, axial ribs that transition to one web each are arranged on the sleeve-shaped connecting piece. As a result, water supply induced in a direction orthogonal to the disk to the flow-through opening is achieved.

[0013] In a further configuration of the present invention, the mounting mandrel of the valve body has, at the end side, a locking head having a maximum outer diameter larger than the inner diameter of the hole of the disk, preferably in the shape of a truncated cone. This enables simple tool-free fixing of the disk to the valve body. Alternatively, the mounting mandrel of the valve body may have a male thread onto which a fixing nut is screwed to fix the disk in the axial direction.

[0014] Preferably, the disk is made of plastic. This achieves inexpensive production. Furthermore, the elastic material facilitates the assembly of the disk onto the mounting mandrel via the locking head.

[0015] Another configuration and improvement of the present invention is described in the other dependent claims. An embodiment of the present invention is shown in the drawings and will be described in detail below.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3a

Figure 3b

Figure 4a

Figure 4b

Figure 5a

Figure 5b

Figure 5c

Figure 5d

Figure 6

Mode for Carrying Out the Invention

[0017] The upper valve member selected as an example has a head piece 1. The head piece 1 is penetrated at the center by a main shaft 2 guided radially within this head piece 1. Through the main shaft 2, a valve body 3 that abuts against the valve seat 61 of the housing 6 can be operated. The valve body 3 is substantially formed by a cylindrical plunger. A disk 4 surrounded by a sealing ring 5 is attached to the plunger. The disk 4 and the sealing ring 5 are applied to the valve seat 61 of the housing 6.

[0018] The head piece 1 is composed of a symmetric hollow body with both end faces open. The head piece has a sleeve-shaped portion 11 on the side opposite to the housing 6. An integrally formed stopper 12 for applying the valve body 3 is provided on the entire inner circumference of this portion 11. At the end of the head piece 1 closer to the housing 6, the head piece 1 has an external connecting thread 13 on the outside. By the connecting thread 13, the head piece 1 can be screwed into the housing 6 of the fluid device.

[0019] After screwing in, the screwed flange 14 of the head piece 1 is placed on the housing 6 of the fluid device. The screwed flange 14 has an annular groove 15 for accommodating an O-ring 71 on the side closer to the connecting thread 13. The screwing into the fluid device is performed by a polygonal head 16 arranged on the side of the screwed flange 14 opposite to the connecting thread 13. An additional thread 17 for attaching a sleeve (not shown) may be provided on the outside of this portion of the head piece 1 as shown in the figure. The sleeve-shaped portion 11 of the head piece 1 has a hexagonal hole 18 on the inside at the height of the screwed flange 14 and the thread 17.

[0020] The main shaft 2 is substantially solid. On the side opposite to the head piece 1, the outer side of the main shaft 2 is formed as a multi-sided head 21, and inside, it has a blind hole 22 with an internal thread for fixing a rotation grip (not shown). Subsequently, on the outer side of the main shaft 2, a cylindrical surface 23 for guiding the main shaft 2 radially into the head piece 1 is provided. An annular groove 24 for accommodating the O-ring 72 is machined on this cylindrical surface 23. The O-ring 72 seals the main shaft 2 against the head piece 1. A notch 25 is arranged between the cylindrical surface 23 and the multi-sided head 21. An axial position fixing element 73 in the form of a retaining ring is elastically fitted into the notch 25. The axial position fixing element 73 prevents the main shaft 2 from penetrating into the head piece 1 beyond a preset dimension.

[0021] The main shaft 2 is rotatable within the head piece 1. The main shaft 2 has an external thread 26 on the side opposite to the multi-sided head 21. Above the external thread 26, a screwed flange 27 is integrally formed.

[0022] The valve body 3 is formed in the form of a cylindrical plunger. The valve body 3 is formed by a hollow cylindrical portion 31. A widened attached portion 32 follows this hollow cylindrical portion 31. The attached portion 32 has an edge 33 with a rounded inner side 34 over the entire circumference at the end opposite to the hollow cylindrical portion 31. At the center of the edge 33 extending over the entire circumference, a cylindrical mounting mandrel 35 is integrally formed. The mounting mandrel 35 has a locking head 36 at the end side. On the side of the hollow cylindrical portion 31 opposite to the attached portion 32, two stepped portions 37 used for accommodating the O-ring 75 are integrally formed, spaced apart from each other over the entire circumference. At the end of the hollow cylindrical portion 31 opposite to the attached portion 32, a hexagonal head 38 (not shown in the figure) is integrally formed. This hexagonal head 38 corresponds to the hexagonal hole 18 of the head piece 1 and helps prevent the rotation of the valve body 3 inside the head piece 1. The hollow cylindrical portion 31 has an internal thread 39 on the inside.

[0023] The disk 4 is substantially formed in a frustum shape. A hole 41 is machined at the center of the disk 4. The hole 41 transitions into a cylindrical through-passage of an annular spacer 43 disposed in the disk 4. The disk 4 is provided with six identical flow-through openings 42 that are radially spaced from the hole 41 and evenly spaced from each other over the entire circumference. These flow-through openings 42 are formed in a trapezoidal shape. The bottom side 421 of the flow-through opening 42 is formed in an arc shape and is located on two virtual arcs arranged concentrically with each other. Between the flow-through openings 42, a substantially square web 44 is defined by these flow-through openings 42. As a result, an inner annular body 45 and an outer annular body 46 arranged concentrically with respect to the inner annular body 45 are formed, and a spoke-like arrangement of the web 44 exists between both annular bodies 45, 46.

[0024] As particularly recognized in FIG. 5b), the inner annular body 45 transitions into a sleeve-shaped terminal piece 47. On the outer side of the terminal piece 47, axial ribs 471 that transition into one web 44 each are arranged. The axial ribs 471 are formed with chamfers at the ends facing the outer annular body 46.

[0025] By arranging the flow-through openings 42 and the annular spacer 43 having a frustum-shaped outer peripheral surface disposed on the side opposite to the sleeve-shaped terminal piece 47 of the inner annular body 45 in this way, an even backwashing of the disk 4 for obtaining an even sealing pressure is achieved in the closed state of the valve body 3 in which the valve body 3 is in contact with the valve seat 61 of the housing 6. In the open position of the valve body 3, continuous water exchange is achieved by the arrangement of the flow-through openings 42. As a result, the formation of water stoppage in the region of the seal 5 is prevented.

[0026] The valve body 3 is inserted into the head piece 1 such that the hexagonal head 38 of the valve body 3 contacts the hexagonal hole 18 of the head piece 1. Thereby, the valve body 3 is held non-rotatable relative to the head piece 1. The male thread 26 of the main shaft 2 is screwed into the female thread 39 of the valve body 3. In this case, the main shaft 2 is axially positioned inside the head piece 1 via the axial position fixing elements 73, 74. Therefore, by the rotation of the main shaft 2, the valve body 3 moves axially inside the head piece 1. This axial movement of the valve body 3 is restricted by the stopper 12 of the head piece 1. At the end position, the upper stepped portion 37 of the valve body 3 near the thread 17 contacts the stopper 12.

[0027] In the closed state of the valve upper member, at the reverse end position of the valve body 3, the attached portion 32 contacts the valve seat 61 of the housing 6. The functional form of the seal assembly is shown in FIG. 6. In the figure, the water pressure p is indicated by an arrow. Water is guided by the rib 471 arranged on the sleeve-shaped connecting piece 47, passes through the flow-through opening 42, enters the intermediate chamber between the valve body 3 and the disk 4 guaranteed by the spacer 43 of the disk 4, and presses the sealing ring 5 radially outward from the side. Thereby, an assist for the sealing action is obtained.

[0028] In the open position of the valve body 3, in this embodiment, six arranged flow-through openings 42 guarantee a constant water exchange in the intermediate chamber.

[0029] In FIG. 6, the locking head 36 of the mounting mandrel 35 of the valve body 3 can be clearly recognized. By this locking head 36, the disk 4 is positioned fixed to the valve body 3. The limited elastic disk 4 formed from plastic is simply put over the mounting mandrel 35 beyond the locking head 36 with a hole 41 having an inner diameter slightly smaller than the maximum outer diameter of the locking head 36 for fixation. Thereafter, the disk 4 is axially positioned fixed by the locking head 36 protruding beyond the hole 41.

Claims

1. An upper valve member comprising a headpiece (1), wherein the headpiece (1) is centrally penetrated by a main shaft (2), and a valve body (3) that is pressed against a valve seat (61) of a housing (6) is operable via the main shaft (2), and a sealing device is disposed between the valve body (3) and the valve seat (61), the sealing device comprising a sealing ring (5), the sealing ring (5) being in contact with a disk (4) having a hole (41), and the disk (4) being positioned on the mounting spindle (35) of the valve body (3) through the hole (41), in an upper valve member, The valve upper member is characterized in that the disk (4) has at least two passage openings (42) arranged radially apart from the hole (41) and spaced apart from each other around its entire circumference.

2. The valve upper member according to claim 1, characterized in that an annular spacer (43) surrounding the hole (41) is integrally molded on the side of the disc (4) closer to the headpiece (1).

3. The valve upper member according to claim 1 or 2, characterized in that a sleeve-shaped connecting piece (47) surrounding the hole (41) is arranged on the side of the disk (4) opposite to the headpiece (1).

4. The valve upper member according to claim 1, characterized in that at least three flow openings (42) are arranged on the disk (4) at equal intervals from one another around its entire circumference.

5. The valve upper member according to claim 1, characterized in that at least two of the flow openings (42) are formed in a trapezoidal shape.

6. The valve upper member according to claim 5, characterized in that the base (421) of the trapezoidal flow opening (42) is formed in an arc shape, and the base (421) is located on two imaginary arcs arranged concentrically with respect to each other.

7. The valve upper member according to claim 1, characterized in that the flow openings (42) are formed to be the same shape as each other.

8. The valve upper member according to any one of claims 5 to 7, characterized in that the bottom edges (421) of two adjacent passage openings (42) are wider than the distance between the passage openings (42) when viewed in the circumferential direction.

9. The valve upper member according to claim 5, characterized in that two adjacent passage openings (42) each define a substantially rectangular web (44).

10. The valve upper member according to claim 6, characterized in that the passage opening (42) forms two concentric annular bodies (45, 46), and the two annular bodies (45, 46) are preferably connected to each other via a plurality of webs (44) evenly arranged around the entire circumference.

11. The valve upper member according to claim 10, characterized in that the inner annular body (45) transitions to a sleeve-shaped connecting piece (47) that protrudes more than the outer annular body (46) in the axial direction opposite to the valve body (3).

12. The valve upper member according to claim 11, characterized in that each sleeve-shaped connecting piece (47) has an axial rib (471) that transitions to one of the webs (44).

13. The valve upper member according to any one of claims 10 to 12, characterized in that the inner ring body (45) transitions to an annular spacer (43) that protrudes in the opposite direction to the valve body (3) and more than the outer ring body (46), and the annular spacer (43) preferably has an outer circumferential surface formed in the shape of a frustocone.

14. The valve upper member according to claim 1, characterized in that the mounting shaft (35) of the valve body (3) has a male thread into which a fixing nut is screwed.

15. The valve upper member according to claim 1, characterized in that the mounting shaft (35) of the valve body (3) has a locking head (36) at its end, which is preferably frustoconical in shape and has a maximum outer diameter larger than the inner diameter of the hole (41) of the disc (4).

16. The valve upper member according to claim 1, characterized in that the disc (4) is made of plastic.

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