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 an end stop area (30) in which the sliding tongue can be brought into an end position of the closed position with a front end (E1) in contact with the valve housing (4), characterized in that the end stop area (30) in the closing direction (SR) is limited by a stop surface (32) and to a first side transverse to the slide guide (10) by a first side surface (34) which is spaced apart from the slide guide (10).

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. Furthermore, the slide valve 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. In addition, the valve housing forms an end-stop region in which the slide tongue, in an end position of the closed position, can be brought into contact with the valve housing with its forward end with respect to a closing direction.

[0002] From DE 20 2016 101 646 U1, a slide 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 wedge-shaped towards a lower edge of the through-channel at the level of the channel. In this way, when the valve plate is moved into the closed position, it is pressed laterally against a seal at the lower edge of the through-channel and, in an end position, abuts the housing in an end-stop area that is laterally limited by the slide guide.

[0003] With these types of gate valves, solids often become trapped in the end-stop area formed by the gate guide when closing. These solids are carried along in a medium, such as wastewater, passing through the channel. In some cases, the trapped solids accumulate to such an extent that the gate valve can no longer be completely closed or other malfunctions occur.

[0004] The object of the invention is to avoid the aforementioned disadvantages in a slide valve and to ensure permanently trouble-free opening and closing of the slide valve.

[0005] This problem is solved by a slide valve with the features of claim 1. The end stop area is bounded in the direction of movement by a stop surface and on a first side transverse to the slide guide by a first side surface, which is spaced apart from the slide guide. In this way, a kind of tongue recess is formed on the stop surface of the end stop area, which is significantly wider than the slide tongue or its slide guide, so that solids which become trapped between the front end of the slide tongue and the stop surface when the slide valve closes can easily detach from the stop surface when the slide valve reopens and, in particular, cannot become permanently wedged in the end stop area.

[0006] In a particularly advantageous embodiment, the end stop area in the profile is bounded on a second side transverse to the slide guide by a second side surface and tapers between the first and second side surfaces towards the stop surface. In this way, the end stop area widens away from the stop surface and towards the passage channel, so that when the slide valve is reopened from a closed position, the end stop area can be subjected to flows which, in the case of solids previously trapped between the slide tongue and the stop surface, flush the end stop area clear.

[0007] It is advantageous if the first side surface has an inclined profile towards the stop surface in order to make it more difficult for solids to become jammed between the first side surface and the slide guide.

[0008] Advantageously, the profile inclined towards the impact surface is convexly shaped to allow particularly good flow through the end impact area when the slide valve is open.

[0009] Furthermore, it is advantageous if the second side surface forms a guide surface for the slide guide in order to ensure stable guidance of the slide tongue until it rests against the stop surface.

[0010] Furthermore, it is advantageous if the sliding tongue tapers towards the front end E1, so that solids which are trapped between the sliding tongue and the stop surface in the closed position can more easily detach from the sliding tongue when the slide valve is reopened.

[0011] 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.

[0012] 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 cutaway view through a slide guide of the slide valve in an open position and Fig. 4 a cutaway view through the slide guide in an end position of a slide tongue in a closed position.

[0013] Fig. 1 shows 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.

[0014] 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.

[0015] At one edge 22 of the passage channel 8, a circumferential seal 24 is arranged on one housing part 4A, against which the sliding tongue 14 can be placed in the closed position in order to tightly close the passage channel 8.

[0016] As in Fig. As shown in Figure 3, the sliding tongue 14 at least partially opens the passage 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. When the sliding tongue 14 is moved in the closing direction SR, it is biased against the circumferential seal 24 at both its front end E1 and its rear end E2.

[0017] Fig. Figure 4 shows an end position of the sliding tongue 14 in the closed position, in which the sliding tongue 14 tapers towards its front end E1 and rests against a stop surface 32 of an end stop area 30. The end stop area 30 is bounded on one side, transverse to the closing direction SR, by a first side surface 34, which is at least mostly spaced apart from the slide guide 10 and thus also from the sliding tongue 14 resting against the stop surface 32. The first side surface 34 has a convex profile P inclined towards the stop surface 32. On the other side, the end stop area 30 is formed transversely to the closing direction SR by a second side surface 36, which serves as a guide surface for the slide guide 10.

[0018] As from Fig.As can also be seen from Figure 4, a support element 40 can extend from the first side surface 34, on which the sliding tongue 14 can be supported in the closed position towards the first side.

[0019] The end stop area 30, which is laterally limited by the two side surfaces 34, 36, tapers in any case towards the stop surface 32 and forms a kind of tongue sump on it, which flows through in the open position and can therefore be more easily freed from solids that can be trapped between the slide tongue 14 and the stop surface 32 when the slide valve 2 is closed.

[0020] 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 an end stop area (30) in which the sliding tongue can be brought into an end position of the closed position with a front end (E1) in contact with the valve housing (4), characterized by, that the end stop area (30) in the closing direction (SR) is limited by a stop surface (32) and to a first side transverse to the slide guide (10) by a first side surface (34) which is spaced apart from the slide guide (10). [2] Slide valve according to claim 1, characterized by , that the end stop area (30) is limited to a second side transverse to the slide guide (10) by a second side surface (36) and tapers towards the stop surface (32) between the first side surface (34) and the second side surface (36). [3] Slide valve according to claim 1 or 2, characterized by , that the first side surface (34) has an inclined profile (P) towards the stop surface (32). [4] Slide valve according to claim 3, characterized by , that the profile (P) inclined towards the stop surface (32) is convexly shaped. [5] Slide valve according to any one of claims 2 to 4, characterized by, that the second side surface (36) forms a guide surface for the slide guide (10). [6] Slide valve according to any one of claims 1 to 5, characterized by , that the sliding tongue (14) tapers towards the front end (E1).

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