Plug valve

 

(57) Abstract:

The invention relates to valves, particularly for plug-in valves, and is designed to overlap the bore of the pipeline. Plug valve is installed in the plug-in connector pipeline for liquid and has a mounting element. The installation element can be rotated relative to the valve body by means of the adjusting ring and the gear element and cannot be rotated relative to the transmission element. The installation element forwards along the axis of the valve stem. The valve stem carries a locking item of the valve and is installed with the possibility of limited movement relative to the valve seat. Rotation of the adjusting element relative to the valve seat and the transmission element causes axial displacement of the adjusting element in one direction to the first stop, and in the other direction up until the stop part of the valve will not rely on the valve seat. The invention improves the tightness of the plug valve in its closed position. 5 C.p. f-crystals, 8 ill.

The invention relates to a plug valve that is installed in the plug-in connector of the pipeline is and by means of the adjusting element and the transmission element, cannot be rotated relative to the gear element and forwards along the axis of the valve stem carrying the locking part of the valve and mounted with limited movement relative to the valve seat.

In known plug valve of this type (see, for example, DE 3300623 C2 or DE 4442744 A1), which can be used in combination with thermostatic head kVcan be adjusted through the adjustment ring and the adjusting element is rotated, the adjusting ring so that during rotation passing in the axial direction of the peripheral wall installation element partially or completely covers the opening in the valve body. If this part of the wall closes the opening completely, then fully Babich path for fluid flow through the valve.

However, so as to ensure that the installation element to rotate relative to the valve body between them should be a gap, to completely block the flow of liquid is impossible.

The basis of the invention is to create a plug valve, such as those described above, in which when set to KVzero, completely blocked the path Lovozero element relative to the valve seat and the transmission element causes axial displacement of the adjusting element in one direction to the first stop, and in the other direction up until the stop part of the valve will not rely on the valve seat.

In this construction the rotation of the adjusting element not only leads to rotation of the adjusting element, but also to its axial movement, and this movement to the first stop limits the maximum height of the shutoff valve parts, and hence the maximum value of kV. The minimum value of kVcorresponds to the closed position in which the locking part of the valve based on the valve seat and completely blocks the path of the stream.

In a preferred embodiment, the adjusting element based on the spiral guide, coaxial with the valve stem. In this case, the guide has a simple design.

A particularly simple design is a guide that represents the inclined plane, on which rests the tab setup item. The first stop may be located on the upper end of the inclined plane, and at its lower end may be located at the second focus. These stops define the range pre-setting.

Inclined plane may be located on the inner self installation element can be threaded, member engages the thread of the valve body.

Further, the invention described in the examples of the preferred variants of its implementation with reference to the accompanying drawings, in which:

Fig.1 depicts a side, partial section along the axis, the first embodiment of the proposed plug valve, is inserted in the pipeline for liquids;

Fig.2 depicts additional partial section along the axis of the valve shown in Fig.1;

Fig.3 depicts the valve body in cross section in the zone of lateral openings for liquids;

Fig.4 shows a partial section along the axis of the next version of the proposed plug-in valve, which is pre-set to kVcorresponding to complete closing of the valve;

Fig.5 depicts a section of the valve similar to Fig.4, but with a preset average value of kV;

Fig.6 depicts a section of the valve similar to Fig.4, but with preset maximum values of kV;

Fig. 7 depicts a side view of part of the plug valve shown in Fig. 4;

Fig.8 depicts a cross-section similar to Fig.3.

Plug valve shown in Fig.1-3, is inserted in the pipeline is chastek (4) on the outer side of the housing (5) valve screwed in has an internal thread (2) plug-in connector (3). On the lower end portion (6) of the housing (5) valve is secured using the locking ring (8) insert (7). The snap ring on one side is engaged with the annular groove on the inner surface of the end portion (6), and on the other hand with the lower surface of annular projection (9) of the insert (7) resting on the internal shoulder end part (6). So we can assume that the insert (7) is part of the housing (5) of the valve. Their free end of the insert (7) is held inside the intake pipe (10), inserted into the pipe (1) for liquid and sealed in the inlet pipe (10) o-ring (11). Plug-in connector (3) and inlet pipe (10) are welded to the pipe (1) for liquids.

In case (5) valve is installed with the possibility of rotation of the cylindrical transfer element (12) is sealed relative to the housing (5) valve o-ring (13). By means of the adjusting ring (14) connected to the drive element (12) and forming the adjusting element can be rotated cylindrical mounting member (15) mounted in the housing (5) of the valve. The adjusting ring (14) is connected with the transmission element (12) with axial who are waiting for them. Similarly, on the outer side of the installation element (15) has axial ribs (18) and the grooves between them. Edges (17, 18) and the grooves are engaged with each other. In addition, the installation element (15) has a coaxial opening extending step to one of its ends, in which you installed the outer spring (19), resting one end on a shoulder (20) made in this hole, and the other end on the inner shoulder (21) of the transfer element (12). Thus, the installation element (15) can move in the axial direction within the transmission element (12) by the force of the spring (19) or by overcoming the force of the spring (19).

In the hole of the adjusting element (15) is a rod (22) of the valve, which can move in the axial direction. When the control element, for example a work item thermostatic heads, acts on the outer end of the plunger (23) extending out through the stuffing box (24), the valve stem can move this plunger in the axial direction to overcome the force of the return spring (25) located between the annular protrusion (26) of the shaft (22) of the valve and additional internal Laplacian (27) in the hole of the installation element (15).

At the end of the rod (22), perform the maintenance with the valve seat, not shown in Fig.1 and 2, the inside of the insert (7).

On the lower outer edge of the installation element (15) axial protrusion (29), through which the adjusting element (15) is based on the spiral guide, coaxial with the rod (22) of the valve, and represents a gradually rising inclined plane (30). Inclined plane (30) is at the upper end of the first support (31), and at the lower end of the second stop (32). When turning the adjusting ring (14), together with the installation element (15), the protrusion (29) can move between the stops in both directions to a limited extent, resulting in the installation element (15) will move in the axial direction in the housing (5) of the valve. In another embodiment, the inclined plane (30) and stops (31, 32) can be formed on the inner surface of the housing (5) of the valve or its end portion (6).

This movement of the adjusting element (15) in the housing (5) of the valve limits the height of the rod (22) of the valve and secured on the locking part (28) under the action of a return spring, so that when the lifting rod (22) of the locking piece (28) is moved all the way into the free end of the installation element (15) through the washer (33), kurasu the element (12) and the adjusting element (15) to carry out the necessary pre-installation valuesV. The fluid flow almost freely flows through the side holes (34) in the housing (5) of the valve and, in fact, limited only by the width of the hole plug valve between the shut-off part (28) and the saddle.

If the value of kVset to zero, i.e., the protrusion (29) rests against a stop (32) and the installation element (15) is in its lower position, the locking piece (28) is pushed to the valve seat. In this case, the valve is completely closed and cannot be opened return spring (25) or by lowering the control element acting on the plunger (23). When setting values of kVeliminates unwanted flow of fluid, even in small quantities.

At the bottom of the recess (35) adjusting ring (14) is labeled N the neutral position and the teeth (36). When turning the adjusting ring (14) tooth (36) is engaged with the teeth (37) in the label area (38) of the control ring mounted to rotate with overcoming the friction force on the circumference of the body (5) of the valve, thereby tooth (36) captures the reference ring (39). Thereby retaining the mutual installation ring (14) and the reference ring (39), in which the rotation of the setting ring is LCA (14) in the opposite direction are pre-set valueVplug valve.

An embodiment of the invention shown in Fig.4-8, differs from the variant shown in Fig.1-3, only that on the inner side of the part (40) wall installation element (15), serving in the axial direction on one end, there is a thread (41), which is in engagement with the thread (42) on the housing (5) of the valve, more precisely, on the insert (7), which is a continuation of the housing (5) of the valve. As in the first embodiment, the installation element (15) can move in the axial direction during rotation between the stop formed by Laplacian (21), and a stop formed by an annular protrusion (9) of the insert (7). When the installation element (15) abuts against the upper stop formed by the shoulder (21), sets the maximum value of kV. If the installation element (15) abuts against the lower stop formed by the annular protrusion (9), the value of kVequal to zero, while the locking piece (28) of the valve based on the valve seat formed by the upper beveled edge of the insert (7), so completely is being blocked path for fluid flow.

Otherwise, the principle of operation and design of this variant is similar to the first option.

Possible modification of ulpana in the axial direction over the holes (34), and the thread (42) is performed on the outer side of the part (40) of the wall.

1. Plug valve installed in the plug-in connector (3) of the pipeline (1) for liquid and having a mounting element (15) which can be rotated relative to the housing (5) of the valve by means of the adjusting element (14) and the transmission element (12), cannot be rotated relative to the transmission element (12) and forwards along the axis of the rod (22) of the valve bearing locking part (28) of the valve and mounted with limited movement relative to the seat (43) of the valve, characterized in that the rotation of the adjusting element (14) relative to the seat (43) valve and transmission element (12) leads to axial displacement of the adjusting element (15) in one direction to the first stop (31; 21), and in the other direction up until the stop part (28) of the valve will not rely on the saddle (43) of the valve.

2. Plug valve under item 1, characterized in that the adjusting element (15) is based on the spiral guide, coaxial with the rod (22) of the valve.

3. Plug valve under item 2, characterized in that the guide represents an inclined plane (30), on which the adjusting element (15) relies rates in an inclined plane, and at its lower end is located a second stop (32).

5. Plug valve under item 3 or 4, characterized in that the inclined plane (30) is located in the housing (5) of the valve.

6. Plug valve under item 1 or 2, characterized in that the adjusting element (15) is threaded (41), which is in engagement with the thread (42) of the housing (5) of the valve.

 

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