Slide valve

Abstract

Slide valve (2) with a valve housing (4) which forms a slide guide (10) extending along a slide plane (12), along which a slide tongue (14) can be displaced via a drive rod (20) of a drive unit (18) in a direction of movement (R) between a closed position and an open position, with a through channel (8) passing through the valve housing (4) transversely to the slide plane (12), which can be closed in the closed position by means of the slide tongue (14) and can be at least partially released in the open position, and which has a circumferential seal (24) on an edge (22), and with deflection means by which the sliding tongue (14) can be deflected laterally against the seal (24) of the passage channel (8) in the closed position with respect to the sliding plane (12), characterized in that the deflection means comprise first housing-side deflection means (26A, 26B) which act on a first side (S1) of the passage channel (8) in the closed position, and second housing-side deflection means (30A, 30B) which are spaced apart from the first housing-side deflection means (26A, 26B) and which act on a second side (S2) of the passage channel (8) facing away from the first side (S1) in the closed position.

Description

[0001] The invention relates to a slide valve according to the preamble of claim 1. This valve has a valve housing that forms a slide guide extending along a plane of movement, along which a slide tongue is displaceable via an actuating rod of an actuating unit in a direction of movement between a closed position and an open position. The slide valve also has a through-channel that extends transversely through the valve housing to the plane of movement and which can be closed by means of the slide tongue in the closed position and at least partially opened in the open position. The through-channel also has a circumferential seal at one edge. Furthermore, the slide valve has deflection means by which the slide tongue is deflected laterally against the seal of the through-channel in the closed position with respect to the plane of movement.

[0002] From DE 20 2016 101 646 U1, a gate valve with a valve plate is known that serves to open and close a through-channel. The valve plate is guided by guide rails that rise in a wedge shape at the level of the through-channel towards a lower edge of the through-channel. In this way, the valve plate is pressed against a seal at the lower edge of the through-channel.

[0003] The lateral deflection of the valve plate by means of the guide rails ensures a particularly tight and secure closure of the passageway. However, this lateral deflection creates higher frictional resistance forces between the guide rails and the valve plate, requiring relatively high drive forces to overcome when moving the valve plate. Furthermore, the frictional resistance forces occurring during movement can also lead to higher manufacturing costs, as higher-grade materials must be used to withstand the required high drive forces.

[0004] The object of the invention is to avoid the aforementioned disadvantages in a generic slide valve and to enable easier movement of the slide tongue.

[0005] This problem is solved by a slide valve with the features of claim 1. The deflection means comprise first deflection means, which act on a first side of the passage channel in the closed position, and second deflection means, spaced apart from the first deflection means with respect to the direction of movement, which act on a second side opposite the first side in the closed position. This split arrangement of the deflection means on a first side and on a second side opposite the passage channel allows intermediate areas of the slide guide to be kept clear. In these areas, only relatively low frictional resistances are generated during the lateral deflection of the slide tongue when moving it into the closed position. This makes it easier, or requires less force, to move the slide tongue into the laterally offset closed position.The distributed arrangement of the deflection means on different sides of the passage channel ensures a stable preload of the sliding tongue against the circumferential seal of the passage channel.

[0006] In a particularly advantageous embodiment, the first deflection means have a first housing-side ramp contour formed on the first side, against which a front end of the slide tongue can be applied when the slide valve is moved to the closed position. Furthermore, the second housing-side deflection means have a second housing-side ramp contour formed on the second side, against which a rear end of the slide tongue can be applied when the slide valve is moved to the closed position. These spaced-apart ramp contours on opposite sides allow the slide tongue to be pressed against the circumferential seal provided on the passage channel via relatively short inclines on both sides in the direction of movement, thus generating a preload of the slide tongue against the seal on both sides.

[0007] Alternatively or additionally, a first ramp contour is formed at the front end of the slide tongue, which can be applied to the first side of the flow channel when the slide valve is moved to the closed position. Furthermore, a second ramp contour is formed at the rear end of the slide tongue, which can be applied to the second side of the flow channel when the slide valve is moved to the closed position. Thus, the ramp contours can also be formed on the slide tongue, either to simplify their manufacture as an alternative to the housing design or to implement them in addition to the housing design, thereby increasing the deflection effect through the combined action of both ramp contours.

[0008] It is advantageous if the first deflection elements and / or the second deflection elements each have left-hand first deflection elements and spaced-apart right-hand first deflection elements and / or left-hand second deflection elements and spaced-apart right-hand second deflection elements. This paired arrangement of deflection elements, both in the direction of movement and transversely to it, allows the sliding tongue to be pre-tensioned against the seal of the passage channel at four points distributed around the passage channel, thereby achieving a uniformly distributed, circumferential pre-tension.

[0009] Advantageously, in the closed position, the first and second deflection means extend over less than one-third of the free diameter of the passage channel with respect to the direction of movement. This results in particularly low frictional resistance during the lateral deflection of the sliding tongue when moving it into the closed position, allowing the sliding tongue to be moved more easily, or with less drive force, into the laterally offset closed position.

[0010] Furthermore, it is advantageous if the valve housing has a support device against which the sliding tongue can be applied in the closed position via a rear side facing away from the seal of the passage channel, transversely to the plane of the slide, thereby providing additional support for the sliding tongue in the closed position and stabilizing the generated preload.

[0011] Advantageously, the support device has a support nose formed on the first side of the through channel, which makes it particularly easy and cost-effective to produce additional stabilization of the preload of the sliding tongue against the circumferential seal of the through channel.

[0012] Furthermore, it is advantageous if the drive rod is connected to the sliding tongue via a connecting device that has lateral play with respect to the direction of movement. This allows for lateral displacement of the sliding tongue relative to the drive rod when moving into the closed position while maintaining a substantially parallel alignment. This enables the sliding tongue to be pressed evenly and circumferentially against the seal of the passage channel without significant deformation, ensuring a secure closure.

[0013] For this purpose, the sliding tongue is preferably connected to the drive rod via a cam-like guide arrangement in order to ensure a stable connection despite the lateral play.

[0014] It should be noted that all the features of the object according to the invention described above are interchangeable or combinable with each other, provided that such an exchange or combination is not excluded for technical reasons.

[0015] The figures illustrate an exemplary embodiment of the invention. They show: Fig. 1 a partially cutaway view of a slide valve according to the invention, Fig. 2 a perspective exploded view of the slide valve according to Fig. 1, Fig. 3 a perspective view of an arrangement of deflection means of the slide valve according to Fig. 1, Fig. 4 a cutaway view through a slide guide of the slide valve in an open position, Fig. 5 a cutaway view through the slide guide of the slide valve when moved into a closed position and Fig. 6 a cutaway view through the slide guide in a supported end position of a slide tongue.

[0016] The Fig. 1 and Fig. Figure 2 shows a slide valve 2 with a valve body 4, which forms a through-channel 8 of the slide valve 2. This channel can be integrated into a piping system at its ends and, for this purpose, has flanged or tubular connection pieces 6, as shown by way of example for one end. These connection pieces can be connected to a pipe or a connection of a fresh, grey, or wastewater system of a motorhome, coach, or camper van (not shown). As can be seen in particular from Fig. As can be seen from Figure 2, the valve housing 4 consists of at least two housing parts 4A, 4B and forms a slide guide 10 at the level of the through-channel 8, which defines a slide plane 12 extending transversely to a flow direction of the through-channel 8. In this slide plane 12, a slide tongue 14 is displaceable in a direction of movement R between an open position (shown) and a closed position (shown with dashed lines). In the open position (shown), the slide tongue 14 is received at least mostly in a receiving pocket 16, so that the through-channel 8 is at least largely open and can flow through it essentially freely. In the closed position, however, the slide tongue 14 completely closes the through-channel 8.

[0017] To adjust the sliding tongue 14, a drive unit 18 is attached to the valve housing 4, which is exemplified by a pneumatic cylinder assembly. Alternatively, any other known and suitable actuating device can be provided, such as an electrically, hydraulically, or manually operated actuator. In any case, a drive rod 20, connected to the sliding tongue 14, can be displaced by the drive unit 18. In the illustrated pneumatic cylinder assembly, a drive housing serves as the cylinder and the drive rod 20 as the piston rod.

[0018] A circumferential seal 24 is arranged on one housing part 4A at an edge 22 of the passage channel 8. The sliding tongue 14 can be positioned against this seal in the closed position to tightly close the passage channel 8. To deflect the sliding tongue 14 transversely to the slide plane 12 when it is moved into the closed position and thereby bias it against the circumferential seal 24, an arrangement of deflection means is provided between the other housing part 4B of the housing 4 and the sliding tongue 14. This arrangement consists in particular of Fig. 3 can be seen.

[0019] The deflection means have first deflection means 26A and first deflection means 26B arranged in pairs spaced apart on the housing 4, 4B on the left side. These first housing-side deflection means 26A, 26B each form a first housing-side ramp contour 28A or 28B and are arranged on a first side S1 of the through-channel 8, which faces away from the receiving pocket 16.

[0020] On a side S2 of the through-channel 8 facing away from the first side S1 and towards the receiving pocket 16, second left-side deflection means 30A and second right-side deflection means 30B are arranged in pairs spaced apart on the housing 4, 4B. These second housing-side deflection means 30A, 30B each form a second housing-side ramp contour 32A and 32B.

[0021] Furthermore, the sliding tongue 14 forms, at a front end E1 facing away from the drive rod 20, first slide-side deflection means 34 with a first slide-side ramp contour 36, which can be applied to the first housing-side deflection means 26A, 26B in the closing direction SR. Furthermore, the sliding tongue 14 forms, at a rear end E2 facing the drive rod 20, second slide-side deflection means 38 with a second slide-side ramp contour 40, which can be applied to the second housing-side deflection means 28A, 28B in the closing direction RS.

[0022] As from Fig. As can also be seen from Figure 3, the deflection means 26A, 26B, 30A, 30B, 34 and 38 have only a relatively short extension in the closing direction SR, which in any case is less than one third of a free diameter Df of the passage channel 8 extending in the direction of movement R.

[0023] Furthermore, how from Fig. As can be seen from Figure 3, the valve housing 4 has an additional support device 42 on the first side 1 of the through-channel 8, against which the sliding tongue 14 can be positioned in the closed position such that it can be supported by this device on a rear side B facing away from the circumferential seal 24. For this purpose, the support device 42 forms a support lug 44 which projects from an inner side of the connecting piece 6.

[0024] At the rear end E2, the sliding tongue 14 is connected to the drive rod 20 via a connecting device 46, which has only a positive fit acting in the direction of movement R without significant play. Transversely to the direction of movement R, however, the connecting device 46 has lateral play. For example, the connecting device 46 can have a guide arrangement in which, as shown, a guide cam 48 engages in a guide 50 extending transversely to the direction of movement R in a cam-like manner.

[0025] The functionality of the deflection devices is explained below using the following examples: Fig. 4, Fig. 5 to Fig. 6 described: As in Fig. As shown in Figure 4, the sliding tongue 14 at least partially exposes the free diameter Df of the through-channel 8 in the open position, so that a flow connection exists between the flanged or tubular connecting pieces 6 of the valve housing 4 or the housing parts 4A, 4B. To close the slide valve 2 and thereby interrupt this flow connection, the sliding tongue 14 is moved along the slide guide 10 in the closing direction SR by means of the drive rod 20.

[0026] As soon as the first gate-side ramp contour 36 meets the first housing-side ramp contours 28A, 28B, a displacement occurs between the first gate-side deflection means 34 and the first housing-side deflection means 26A, 26B, as shown in Fig. Figure 5 shows deflection forces F1 generated, which press the sliding tongue 14 at the front end E1 against the circumferential seal 24.

[0027] When the sliding tongue 14 is moved in the closing direction SR, the second slide-side ramp contour 40 also meets the second housing-side ramp contours 32A, 32B, so that deflection forces F2 are also generated between the second slide-side deflection means 38 and the second housing-side deflection means 30A, 30B, which also preload the sliding tongue 14 at the rear end E2 against the circumferential seal 24.

[0028] Due to the at least four separate deflection areas between the housing-side ramp contours 28A, 28B, 32A, 32B and the slide-side ramp contours 36, 40, and due to their short extent in the direction of movement R, the resistance forces generated when moving the slide tongue 14 into the closed position are relatively low, so that the slide tongue 14 can be moved relatively easily.

[0029] The laterally deflectable connecting device 46 according to Fig. 3 enables the sliding tongue 14 to remain aligned parallel to the sliding plane 12 and thus be pre-tensioned evenly and without significant deformation laterally against the circumferential seal 24 in order to close the passage channel 8.

[0030] Fig. Figure 6 shows the end position of the sliding tongue 14 in the closed position, in which it is also supported at its front end E1 on a rear side B by the support lug 44. This ensures that the preload of the sliding tongue 14 against the circumferential seal is permanently secured in the closed position.

[0031] It should be noted that all the elements and features described above of the various embodiments of the object according to the invention are interchangeable or combinable with each other, provided that such an exchange or combination is not excluded for technical reasons. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2016 101 646 U1

[0002]

Claims

[1] Slide valve (2) with a valve housing (4) which forms a slide guide (10) extending along a slide plane (12), along which a slide tongue (14) can be displaced via a drive rod (20) of a drive unit (18) in a direction of movement (R) between a closed position and an open position, with a through channel (8) passing through the valve housing (4) transversely to the slide plane (12), which can be closed in the closed position by means of the slide tongue (14) and can be at least partially released in the open position, and which has a circumferential seal (24) on an edge (22), and with deflection means by which the sliding tongue (14) can be deflected laterally against the seal (24) of the passage channel (8) in the closed position with respect to the sliding plane (12), characterized by, that the deflection means comprise first housing-side deflection means (26A, 26B) which act on a first side (S1) of the passage channel (8) in the closed position, and second housing-side deflection means (30A, 30B) which are spaced apart from the first housing-side deflection means (26A, 26B) and which act on a second side (S2) of the passage channel (8) facing away from the first side (S1) in the closed position. [2] Slide valve according to claim 1, characterized by, that the first housing-side deflection means (26A, 26B) have a first housing-side ramp contour (28A, 28B) formed on the first side (S1) to which a front end (E1) of the slide tongue (14) can be applied when the slide valve (2) is moved into the closed position, and that the second housing-side deflection means (30A, 30B) have a second housing-side ramp contour (32A, 32B) formed on the second side (S2) to which a rear end (E2) of the slide tongue (14) can be applied in the closed position. [3] Slide valve according to claim 1 or 2, characterized by, that a first slide-side ramp contour (36) is formed at the front end (E1) of the sliding tongue (14), which can be applied to the first side (S1) of the through channel (8) in the closed position, and a second slide-side ramp contour (40) is formed at the rear end (E2) of the sliding tongue (14), which can be applied to the second side (S2) of the through channel (8) in the closed position. [4] Slide valve according to any one of claims 1 to 3, characterized by , that the first deflection means (26A, 26B) and / or the second deflection means (30A, 30B) each have left-side first deflection means (26A) and spaced right-side first deflection means (26B) and / or left-side second deflection means (30A) and spaced second right-side deflection means (30B). [5] Slide valve according to any one of claims 1 to 4, characterized by, that the first and second deflection means (26A, 26B, 30A, 30B) extend over less than one third of a free diameter (Df) of the passage channel (8) in the closed position with respect to the direction of movement (R). [6] Slide valve according to any one of claims 1 to 5, characterized by , that the valve housing (4) has a support device (42) on which the slide tongue (14) can be applied in the closed position via a rear side (B) facing away from the seal (24) of the passage channel (8) transversely to the slide plane (12). [7] Slide valve according to claim 6, characterized by , that the support device (42) has a support nose (44) formed on the first side (S1) of the through channel (8). [8] Slide valve according to any one of claims 1 to 7, characterized by , that the drive rod (20) is connected to the sliding tongue (14) via a connecting device (46), which has lateral play with respect to the direction of movement (R). [9] Slide valve according to claim 8, characterized by , that the connecting device (46) has a cam-like guide arrangement between the sliding tongue (14) and the drive rod (20).

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