JPH0219666Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gate valve device, and particularly to a valve device suitable for molding from synthetic resin.

[Conventional technology]

Conventionally, as this type of gate valve device, a structure described in, for example, Japanese Utility Model Application Laid-Open No. 58-169268 is known. As shown in FIG. 4, this conventional valve device has a cylindrical portion 2 formed in a valve body 1.
A valve bearing plate 4, on which a valve shaft 3 that moves up and down the valve body is rotatably fitted, is fitted into the upper opening, and the valve shaft 3 is rotatably fitted onto this valve bearing plate 4. The thrust ring 5 is engaged with the opening edge 5a of the insertion hole into which the valve shaft 3 of the thrust ring 5 is inserted.
The annular protrusion 3a of the valve shaft 3 is rotatably held between the engagement step portion 4a of the insertion hole of the valve shaft bearing plate 4 into which the valve shaft 3 is inserted, and the thrust ring 5 is The flange 9 of the lid body 8, in which the valve shaft 3 is rotatably fitted through the gland packing 7, is engaged with the flange 6 of the cylindrical portion 2 through the flange 6 of the cylindrical portion 2. bolt·
A structure is adopted in which it is removably fixed with a nut 10.

By rotating the valve stem 3, a valve body (not shown) connected to the valve stem 3 is moved up and down, and the flow path formed in the valve box 1 is opened and closed by this valve body. This is how it has become.

[Problem that the invention attempts to solve]

According to the above-mentioned conventional structure, the valve shaft 3 that moves the valve body up and down rotates with respect to the lid body 8 via the gland packing 7, so the gland packing 7 may be damaged or deteriorated depending on the frequency of rotation and must be replaced. The need may arise. In this case, the plurality of bolts and nuts 10 are removed, the lid 8 is removed, and its gland packing 7 is replaced. At this time, when the lid 8 is removed, the thrust ring 5 is no longer supported and Since the valve stem 3 is also no longer supported, the valve body is pushed in the valve opening direction by the liquid pressure that has flowed into the flow path of the valve body 1, and the flow path is opened and liquid may leak. Therefore, when replacing the gland packing 7, there is a problem in that the main valve of the water pipe communicating with the flow path of the valve box 1 must be closed in advance to cut off the water supply.

Therefore, this invention was made in view of the above points,
The valve body can be supported in a sealed state to prevent liquid from leaking even if the lid is removed from the valve box when replacing the gland gasket, and it is no longer necessary to close the main valve of the water pipe to cut off the water supply when replacing the gland gasket. The purpose of this is to eliminate the need for a gland packing and to make it possible to easily replace the gland packing.

[Means for solving problems]

The present invention provides a valve box that forms a flow passage and a cylindrical part that houses a valve body that opens and closes this flow passage, and a thrust ring and a thrust ring receiver are provided on the end face of the cylindrical part of the valve box. A lid body is removably attached via a plate with a plurality of bolts and nuts, and a valve shaft is rotatably inserted from the lid body into the cylindrical portion via the thrust ring receiving plate and the thrust ring. At the same time, the valve body is connected to the valve shaft so as to be vertically movable to open and close the flow passage,
The thrust ring receiving plate has a plurality of bolt insertion holes formed in its outer circumferential portion through which the plurality of bolts are inserted, and at least some of the bolts inserted into the plurality of bolt insertion holes are inserted into the thrust ring receiving plate. It has a screwed nut that locks it.

[Effect]

By configuring the device as described above, the present invention engages the thrust ring and the thrust ring receiving plate with the end face of the cylindrical portion of the valve body, and allows the bolts to be inserted through the plurality of bolt insertion holes formed in the cylindrical portion. Bolts are inserted into a plurality of bolt insertion holes formed in the thrust ring receiving plate, and nuts are fastened to at least some of the bolts to fix the thrust ring receiving plate. Further, a lid is engaged on the thrust ring receiving plate, each of the bolts is inserted into the bolt insertion hole of the lid, and a nut is tightened to each of the bolts. Thereby, the valve shaft inserted into the cylindrical part from the lid body is held in position so as to be rotatable.

In addition, when replacing the gland packing, remove the nuts fastened to each bolt protruding on the lid body, and even if the lid body is removed from the cylindrical part, the thrust ring receiving plate of the thrust ring that holds the valve stem will remain unchanged. Since the valve shaft is supported by a nut screwed onto a bolt at a predetermined position, the valve shaft continues to be held in position, and the flow path is kept sealed by the valve body. Therefore,
The gland packing can be easily replaced.

〔Example〕

The configuration of an embodiment of the present invention will be described based on the drawings.

In the figure, 11 is a valve box molded from synthetic resin such as hard vinyl chloride resin.
is a pipe section 13 having a flow path 12 communicating with a water pipe;
and a valve seat 14 and a cylindrical portion 15,
The valve seat 14 is formed so as to taper upwardly from the periphery of an opening 16 which is opened at the upper part of the inner circumferential surface of the tube part 13, and the cylindrical part 15 is formed by opening the opening of the valve seat 14. An annular step 17 is integrally formed on the outer periphery of the edge to protrude. Further, flanges 18 and 19 are formed at both ends of the tube portion 13 and the upper end of the cylindrical portion 15, respectively, and the upper end of the cylindrical portion 15 and the upper end of the flange 19 form an end face portion 20 that is flush with the other end. . Further, a valve bearing plate 21 is fitted and engaged with the upper opening of the cylindrical part 15, and a guide hole 22 communicating with the cylindrical part 15 is provided in the center of the valve bearing plate 21. An annular locking step 23 is formed at the top. In addition, the valve bearing plate 2
A thrust ring 24 is engaged with the upper part of the thrust ring 24, and the guide hole 22 is formed in the center of the thrust ring 24.
A communication hole 25 communicating with is formed.

Reference numeral 26 denotes a thrust ring receiving plate, and this thrust ring receiving plate 26 is formed to have approximately the same size and shape as the end surface portion 20 of the cylindrical portion 15, and has a center portion thereof.
A communication hole 27 is formed that communicates with the guide hole 22 of the valve bearing plate 21 and the communication hole 25 of the thrust ring 24, and the cylindrical portion 15 is formed on the outer circumference of the communication hole 27.
A plurality of bolt insertion holes 29 are formed that communicate with each of the plurality of bolt insertion holes 28 formed at predetermined intervals in the flange 19 of the flange 19, and the bolts can be inserted through all or part of the plurality of bolt insertion holes 29. An embedding recess 31 in which a nut 30 is embedded is formed in the upper part of the hole 29, and an accommodating recess 32 in which the thrust ring 24 is accommodated is further formed in the lower surface.

Reference numeral 33 denotes a lid, and the lid 33 has a lower end face corresponding to the upper end of the cylindrical portion 15 and a flange 3 corresponding to the upper end of the flange 19 of the cylindrical portion 15 at its lower end.
A flush engagement surface 35 is formed with the lower end surface of 4, and the bolt insertion hole 28 is formed in the flange 34.
A plurality of bolt insertion holes 36 are formed which communicate with each of the bolt insertion holes 29, and a valve shaft insertion hole 37 which communicates with the guide hole 22 and the communication holes 25 and 27 is formed in the center thereof.

Then, the valve shaft 39 is rotatably inserted into the guide hole 22 of the valve bearing plate 21 via the sealing material 38, and the lower surface of the annular protrusion 40 formed approximately in the middle of the valve shaft 39 is inserted into the guide hole 22 of the valve shaft bearing plate 21 using a thrust washer. 41, it is rotatably engaged with the locking step portion 23 of the valve bearing plate 21. Also, the thrust ring 2 is attached to the valve shaft 39.
4 and the thrust ring receiving plate 26 through its communication hole 2.
5, 27 to insert it in a rotatable manner,
This is engaged onto the end surface portion 20 of the cylindrical portion 15, and each bolt insertion hole 2 of this thrust ring receiving plate 26 is
9 so that they communicate with each bolt insertion hole 28. Further, the lid body 33 is rotatably inserted into the valve shaft 39 using the valve shaft insertion hole 37, and the engaging surface 35 of the lid body 33 is engaged with the thrust ring receiving plate 26 on the end surface portion 20, In addition, each of the plurality of bolt insertion holes 36 of the lid body 33 is connected to the bolt insertion hole 2.
9 and the bolt insertion hole 28 so as to communicate with each other. Then, the bolts 42 are inserted from each bolt insertion hole 28 into the bolt insertion holes 29 and 36.
At this time, if the nuts 30 are provided in the buried recesses 31 of the bolt insertion holes 29 of the thrust ring receiving plate 26, insert the bolts 42 while screwing them, and insert the bolts 42 protruding onto the flanges 34 through the washers 43. Tighten the nut 44.

As a result, the thrust ring 24 is held by the thrust ring receiving plate 26 while being accommodated in the accommodation recess 32 of the thrust ring receiving plate 26 on the valve bearing plate 21, and this thrust ring receiving plate 26 is A plurality of nuts 30 screwed onto the end face portion 20 are held in place between the end face portion 20 and the end face portion 20 . Also, the communication hole 25 of the thrust ring 24
The annular protrusion 40 of the valve shaft 39 is rotatably held between the opening edge 25a of the thrust ring receiving plate 26, the opening edge 27a of the communication hole 27 of the thrust ring receiving plate 26, and the locking step 23 of the valve bearing plate 21. is held in position, and this valve shaft 39 is connected to the lid body 3 via a gland packing 46 installed in the annular groove 45.
It is rotatably held in position within the valve shaft insertion hole 37 of No. 3.

47 is a valve body, and this valve body 47 is attached to the valve seat 1.
4, and a guide body 50 that is fitted into the upper part of the valve body 49 and slides inside the cylindrical part 15. The body 49 is formed of a synthetic resin such as vinyl chloride resin into a substantially inverted conical shape with a spherical lower part, and the elastic cover body 48 made of synthetic rubber or the like is fitted onto the outer peripheral surface of the valve body 49 .

The valve body 47 is moved up and down by the valve body 49 to open and close the flow passage 12 of the valve box 11.

Furthermore, guide grooves 52 that engage guide protrusions 51 formed on the cylindrical portion 15 are formed in the vertical direction on both sides of the guide body 50 of the valve body 47 that protrudes into the cylindrical portion 15. At the same time, an internally threaded cylinder 54 is integrally embedded in a shaft hole 53 that penetrates through the center of the upper surface of this guide body 50 and is drilled in the center of the valve body 47, and the internal thread 55 formed in this internally threaded cylinder 54 is inserted into the shaft hole 53. A male thread 54 formed at the lower part of the valve shaft 39 is screwed together. Then, due to the rotation of the valve shaft 39,
The valve body 47 is moved up and down via the guide protrusion 51 and the guide groove 52, and the flow passage 12 is opened and closed by the valve body 49.

Further, a handle 57 is detachably attached to the upper end of the valve shaft 39 by means of a support shaft 58 and a nut 59.

Next, the operation of the above embodiment will be explained.

When the valve shaft 39 is rotated clockwise via the handle 57, the axial movement of the valve shaft 39 is caused by the locking step 23 of the valve bearing plate 21, the opening edge 25a of the insertion hole 25 of the thrust ring 24, and the opening edge 25a of the insertion hole 25 of the thrust ring 24. Since the rotation of the valve body 47 is restricted by the guide protrusion 51 and the guide groove 52, the rotation of the valve body 47 is restricted by the guide protrusion 51 and the guide groove 52. Due to the screwing relationship between the female thread 55 and the male thread 56, the valve body 47 moves up the cylindrical part 15 of the valve box 11 and separates from the valve seat part, and the flow passage 12 of the pipe part 13 becomes open.

Further, when the valve shaft 38 is rotated counterclockwise by the handle 57 in the open state, the valve shaft 39 is operated in the opposite manner to the above case, and the valve body 47 is lowered down the pipe portion 13 to form the valve seat portion and the pipe portion. 13 flow passages 12 are sealed, and the flow passages 12 are completely closed in a liquid-tight manner.

Next, when replacing the gland packing 46, remove the support shaft 58 and nut 59, remove the handle 57 from the valve shaft 39, and also remove the handle 57 from the valve shaft 39.
Each bolt 42 screws the lid 33 onto the cylindrical portion 15 of
Remove the nut 44 and remove the lid 33 from the valve stem 39 and bolt 42. In this case, the thrust ring receiving plate 26 supporting the thrust ring 24 is threadedly supported by the bolt 42 and the nut 30 inserted into the bolt insertion hole 29 having the nut 30, so the lid 33 is removed. Also, the valve shaft 39 is continuously held at the set position by the thrust ring receiving plate 26 via the thrust ring 24, and the valve shaft 39 maintains the lowered state of the valve body 47, so that the valve body 47 opens the flow path 12. The airtight condition is maintained. Therefore, the gland packing 46 of the valve shaft 39 can be replaced without blocking the main valve of the water pipe and causing a water cutoff.

In the embodiment described above, the nut 30 supporting the thrust ring receiving plate 26 is inserted into the buried recess 31 formed in the upper part of the bolt insertion hole 29 of the thrust ring receiving plate 26.
Although the case has been described in which the nut 30 is buried inside, the buried recess 31 of the nut 30 is not limited thereto, and may be formed at the lower part of the bolt insertion hole 36 of the lid body 33, for example.

In addition, in the implementation, annular sealing materials 60 and 61 are embedded in the end surface portion 20 of the cylindrical portion 15 and the upper surface portion of the thrust ring receiving plate 26, respectively, and the upper and lower sealing materials 60 and 61 close the thrust ring. It is preferable to sandwich the receiving plate 26 in a liquid-tight manner.

Further, the nut 30 is inserted into the buried recess 31 in advance.
It may also be buried and fixed by driving it into the hole.

[Effect of idea]

According to the present invention, the thrust ring receiving plate of the thrust ring, through which the valve shaft that moves up and down the valve body is inserted and supported, is inserted into the plurality of bolts that connect the lid body to the cylindrical part of the valve box that houses the valve body. Since the nut is screwed onto at least some of the bolts for support, even if the lid is removed from the cylindrical part of the valve body when replacing the gland packing, the valve shaft will still be supported by the thrust ring through the thrust ring and the thrust ring receiving plate. Since it can be held securely in the set position, the valve body connected to the valve stem can reliably close the flow path of the valve body in a fluid-tight manner, and therefore the water supply can be removed each time the gland packing is replaced. There is no need to block the main valve of the pipe to cause a water cutoff, and the gland gasket can be easily replaced.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of a part of the main parts of a gate valve device showing an embodiment of the present invention, Fig. 2 is a sectional view of the entire gate valve device, and Fig. 3 is a sealed upstream disconnection. FIG. 4 is an enlarged cross-sectional view of a portion of a conventional gate valve device. DESCRIPTION OF SYMBOLS 11... Valve box, 12... Flow path, 15... Cylindrical part, 20... End surface part, 24... Thrust ring,
25... Guide hole, 26... Thrust ring receiving plate,
28... Bolt insertion hole, 29, 36... Bolt insertion hole, 30, 44... Nut, 31... Buried recess, 32... Housing recess, 39... Valve stem, 42...
Bolt, 47... Valve body.

Claims (1)

[Claims for Utility Model Registration] A valve box having a flow passage and a cylindrical part housing a valve body that opens and closes the flow passage, and a thrust ring and a thrust ring on the end face of the cylindrical part of the valve box. A lid body is removably attached via a ring receiving plate with a plurality of bolts and nuts, and the valve body is inserted from the lid body into the cylindrical part via the thrust ring receiving plate and the thrust ring. A rotatable valve shaft that moves up and down to open and close the flow passage is provided, and the thrust ring receiving plate has a plurality of bolt insertion holes formed in an outer circumferential portion thereof through which the plurality of bolts are inserted, and the plurality of A gate valve device characterized in that nuts for locking the thrust ring receiving plate are screwed onto at least some of the bolts inserted into the bolt insertion holes.