JP2009030661A - Gate valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gate valve effectively preventing the earth and sand or the like contained in a contaminated water from stagnating internally. <P>SOLUTION: The upper parts of a pair of long stretching valve spacers 3 are connected together by a mounting plate 4 having an inserting hole 5, and a screw nut 6 is fitted in the inserting hole 5, and stationary plates 7 each having a flow passage 8 in the over-part and having a mounting collar 9 at the periphery of the passage 8 are installed on the obverse and reverse surfaces of the valve spacers 3 while they are threaded from near the central part of the valve spacers 3 to near the bottom so as to constitute a valve box 2 in the longitudinal direction. A slide plate 10 having a through hole 11 is inserted between the two valve spacers 3 in such a way as movable vertically, and the bottom of a screw 12 engaged with the screw nut 6 is coupled to the slide plate 10 rotatably, and the slide plate 10 is moved vertically by rotating the screw 12 so as to make the passage 8 freely opened and closed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gate valve used in a piping line such as a sewage pipe, and more particularly to a gate valve capable of effectively preventing dirt and the like contained in sewage from staying in the valve.

  Conventionally, a gate valve has been used to open and close piping lines such as water and sewage, and the flow rate of water and sewage can be adjusted by this gate valve.

  Here, FIG. 6 is a view for explaining a conventional gate valve 31, and is a perspective view with a part cut away. In this conventional gate valve 31, a plate 33 is inserted into a valve box 32 so as to be movable up and down. A screw screw 34 is connected to the upper portion of the plate 33, and further, an upper portion of the screw screw 34 is connected. A handle 35 is screwed. A flow path 36 as a through hole is formed below the valve box 32, and a flange 37 for mounting a pipe is mounted around the flow path 36. In this configuration, the plate 33 is moved up and down by turning the handle 35, whereby the flow path 36 is opened and closed by the plate 33.

Therefore, by using the gate valve 31 in the piping line, the flow rate 36 is opened and closed by operating the handle 35, so that the amount of water such as water and sewage flowing through the piping line can be easily adjusted.
No. 2002-115774

  Incidentally, in the gate valve as described above, a groove-shaped valve seat 38 is formed around the flow path 36 in order to ensure the fully closed state of the flow path 36. In the fully closed state of the flow path 36, the tip of the plate 33 is inserted into the valve seat 38.

  Therefore, particularly when such a gate valve 31 is used in a sewage line containing earth and sand, the earth and sand contained in the sewage enters the valve seat 38, thereby causing an incomplete seal of the piping line. There is a problem of becoming.

  There is also a sufficient possibility that the plate or the like may be damaged by earth or sand that has entered the valve seat 38.

  Then, this invention makes it the subject to provide the gate valve which can prevent effectively the earth and sand etc. which are contained in sewage stagnating inside.

  The gate valve of the present invention communicates the upper part of a pair of elongated valve spacers with a mounting plate having an insertion hole, is fitted with a screw nut in the insertion hole, has a flow path in the upper part, and A fixed plate with a mounting collar on the periphery is attached to the front and back surfaces of the valve spacer while communicating with the pair of valve spacers from near the center in the longitudinal direction of the valve spacer to near the bottom. A slide plate having a hole is inserted between the pair of valve spacers so as to be movable up and down, and a lower end portion of a screw screw screwed into the screw nut is rotatably connected to the slide plate. By rotating the slide plate, the flow path can be freely opened and closed by moving the slide plate up and down.

  In the gate valve of the present invention, the upper part of the pair of valve spacers is communicated with a mounting plate, and a fixed plate having a flow path is attached to the front and back surfaces of the valve spacer while communicating with the pair of valve spacers to form a valve box. A slide plate is inserted between a pair of valve spacers in this valve box so as to be movable up and down, and the flow path is opened when the position of the through hole formed in the slide plate matches the position of the flow path formed in the fixed plate. In addition, the flow path is closed when the position of the through hole formed in the slide plate does not coincide with the position of the flow path formed in the fixed plate.

  Therefore, unlike the conventional gate valve described above, the gate valve of the present invention does not require a valve seat, so that earth and sand contained in sewage does not stay in the valve.

  The gate valve of the present invention has a pair of long flat plate-like spacers arranged at intervals, and the pair of valve spacers are communicated with each other by a mounting plate at the upper part thereof.

  An insertion hole is formed in the mounting plate, and a screw nut is attached to the insertion hole.

  Furthermore, a fixed plate is mounted on the front and back surfaces of the valve spacer in an arrangement that communicates the pair of valve spacers from the vicinity of the central portion in the longitudinal direction of the valve spacer to the vicinity of the lower end thereof. In addition to having a flow path as a through hole, a mounting collar for mounting a pipe is provided around the flow path.

  And the valve box is comprised by this valve spacer, the attachment plate provided with the screw nut, and the fixed plate.

  Furthermore, a slide plate having a through hole is inserted between a pair of valve spacers in the valve box so as to be movable up and down, and the upper portion of the slide plate is screwed onto the screw nut. The lower end portion of the screw screw is pivotally connected, whereby the slide screw is moved up and down by rotating the screw screw, and the through hole of the slide plate matches the position of the flow path of the fixed plate. Sometimes the flow path is opened, and the flow path is closed when the through hole of the slide plate does not coincide with the position of the flow path of the fixed plate.

  Here, it is preferable to mount a bearing case with a built-in bearing on the slide plate, and to lock the screw screw to the bearing case, thereby making the screw screw rotate more smoothly and moving the slide plate up and down. It can be made easier.

  An embodiment of the gate valve of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the gate valve of the present embodiment, and FIG. 2 is a plan view of the gate valve of the present embodiment. Is a side view of the gate valve of the present embodiment, FIG. 5 is a partial sectional view showing a longitudinal front structure of the gate valve of the present embodiment, and FIG. 4 is a sectional view taken along line AA in FIG. Is the gate valve of this embodiment.

  And the gate valve 1 of a present Example has a valve box and the slide plate inserted so that it could move up and down in this valve box.

  Here, the valve box will be described. In FIG. 1, reference numeral 2 denotes a valve box. The valve box 2 includes a pair of valve spacers arranged at intervals and a mounting plate that communicates the valve spacer 3 at the top. And a screw nut mounted in an insertion hole formed in the mounting plate, and a fixing plate mounted to communicate the pair of valve spacers on the front and back surfaces of the pair of valve spacers.

  That is, in FIG. 1, reference numeral 3 denotes a valve spacer. In this embodiment, the valve spacer 3 is a long plate made of metal and is arranged at an interval. The mounting plate 4 is made of communication.

  Further, as shown in FIG. 5, an insertion hole 5 is formed in the central portion of the mounting plate 4, and a screw nut 6 is attached to the insertion hole 5 via a bolt 21.

  Next, 7 in FIG. 1 is a fixed plate. That is, the fixing plate 7 is mounted on the front and back surfaces of the valve spacer 3 in such a manner that the pair of valve spacers 3 communicate with each other from the vicinity of the central portion to the vicinity of the lower end when viewed in the longitudinal direction of the valve spacer 3. Therefore, the valve box 2 is closed on the left and right sides and the upper side, and opened on the lower side.

  Each of the fixed plates 7 has a flat plate shape made of metal, and a flow path 8 that penetrates the fixed plate 7 is formed in the upper portion. A pipe or the like is attached around the flow path 8. A collar 9 is attached.

  In FIG. 1, the collar 9 on one side is provided with an O-ring 22 for sealing, and a convex portion 23 for connecting pipes is formed as shown in FIG. 9 is formed with a connecting recess 24 (see FIG. 3) for connecting pipes.

  Next, the slide plate will be described. In FIG. 1, reference numeral 10 denotes a slide plate. In the present embodiment, the slide plate 10 is a flat plate made of metal having a vertically long front field of view. It is inserted between the valve spacers 3 so as to be movable up and down.

  The slide plate 10 has the same width as that between the pair of valve spacers 3 and slides on the inner side surfaces of the pair of valve spacers 3 by moving up and down.

  The slide plate 10 has a through hole 11 in the vicinity of the central portion in the longitudinal direction. When the slide plate 10 is raised by a predetermined distance and the through hole 11 overlaps the flow path 8, the fixed plate On the other hand, the flow path 8 of the fixed plate 7 is closed at a portion other than the through hole 11 in the slide plate 10 by lowering the slide plate 10 in this state. Therefore, the through-hole 11 is formed at a position where the through-hole 11 overlaps the flow path 8 when the slide plate 10 is raised by a predetermined distance.

  In this embodiment, when the slide plate 10 is raised to a position where the flow path 8 and the through hole 11 overlap, the lower end portion slightly protrudes below the open portion on the lower side of the valve box 2. The length is of the order of magnitude.

  And the screw screw screwed together by the said screw nut 6 is rotatably connected with the slide board 10 comprised in this way.

  That is, in the figure, reference numeral 12 denotes a screw screw. In this embodiment, the screw screw 12 passes through the screw nut 6 while being screwed to the screw nut 6, as shown in FIG. The socket 13 used when rotating the screw 6 is formed.

  On the other hand, as shown in FIG. 5, a bearing case with a built-in bearing is mounted on the upper portion of the slide plate 10, and the tip of the screw screw 12 is rotatably locked in the bearing case. Yes.

  That is, in the figure, reference numeral 14 denotes a bearing case, and a ball bearing 17 is built in the bearing case 14. The bearing case 14 is connected to the upper portion of the slide plate 10 by a pressing plate 15.

  Further, the tip end portion of the screw screw 12 is penetrated through the bearing case 14, and a hexagon nut 16 is attached to the tip end of the screw screw 12 penetrating the bearing case 14. The screw screw is rotatably connected to the slide plate 10.

  In the figure, 17 is a ball bearing, 18 is a ball bearing, 19 is a spacer, 20 is a cap nut covering the upper part of the bearing case 14, and 21 is a bolt for fixing the pressing plate 15 to the slide plate 10. It is.

  Next, the operation of the valve spacer 1 of the present embodiment configured as described above will be described. When the screw screw 12 is rotated with respect to the screw nut 6 in the direction in which the screw screw 12 is raised, The slide plate 10 rises as it rises. The flow path 8 can be opened by rotating the screw 12 until the position of the through hole 11 in the slide plate 10 reaches the position of the flow path 8.

  On the other hand, when the flow path 8 is fully open or half open, the screw screw 12 is lowered relative to the screw nut 6 and the slide plate 10 is lowered by rotating the screw screw 12 in the opposite direction. As a result, the position of the through hole 11 in the slide plate 10 is shifted from the position of the flow path 8, and the flow path 8 is closed at a portion other than the through hole 11 portion of the slide plate 10. In this state, the lower portion of the slide plate 10 protrudes downward from the valve box 2.

  At this time, in the valve spacer 1 of the present embodiment, the flow path is formed by making the slide plate 10 ascend and descend so that the position of the through hole 11 formed in the slide plate 10 and the position of the flow path 8 are matched or mismatched. 8 does not have a valve seat unlike the conventional gate valve, so that earth and sand contained in the sewage does not stay in the valve.

  As described above, in the valve spacer of the present embodiment, the slide plate 10 is protruded to the lower side of the valve box 2 so as to close the flow path. Therefore, since it does not have a valve seat, it is included in the sewage. It is possible to effectively prevent the accumulated earth and sand from staying inside.

  Further, when the screw screw 12 is rotatably connected to the slide plate 10, the screw screw 12 is easily and smoothly rotated because the screw screw 12 is locked to the bearing case 14 containing the bearing 17. Accordingly, the slide plate 10 can be easily raised and lowered.

  The gate valve of the present invention can be applied to all gate valves for piping because it can prevent sediment and the like from remaining inside and facilitate the opening and closing of the flow path.

It is a front view of the Example of the gate valve of this invention. It is a top view of the Example of the gate valve of this invention. It is a side view of the Example of the gate valve of this invention. It is a figure which shows the AA line cross section in FIG. It is a partial cross section figure which shows the vertical front structure of the Example of the gate valve of this invention. It is a partial cross section for demonstrating the conventional gate valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gate valve 2 Valve box 3 Valve spacer 4 Mounting plate 5 Insertion hole 6 Screw nut 7 Fixing plate 8 Flow path 9 Collar 10 Slide plate 11 Through hole 12 Screw screw 13 Socket 14 Bearing case 15 Holding plate 16 Hex nut 17 Ball bearing 18 Ball bearing 19 Spacer 20 Cap nut 21 Bolt 22 O-ring 23 Convex part 24 Concave part

Claims (2)

The upper part of the pair of long valve spacers (3) is communicated with a mounting plate (4) having an insertion hole (5), a screw nut (6) is attached to the insertion hole (5), and the upper part is flowed to the upper part. A pair of fixing plates (7) having a path (8) and having a mounting collar (9) mounted around the flow path (8) is disposed near the lower end of the valve spacer (3) in the vicinity of the center in the longitudinal direction. The valve spacer (3) is connected to the front and back surfaces of the valve spacer (3) while communicating with each other to form the valve box (2).
A slide plate (10) having a through hole (11) is inserted between the pair of valve spacers (3) so as to be movable up and down, and a lower end of a screw screw (12) screwed into the screw nut (6). The part is connected to the slide plate (10) so as to be rotatable, and the screw (12) is rotated to move the slide plate (10) up and down to open and close the flow path (8). , Characterized by the gate valve.   The bearing plate (14) with a built-in bearing (17) is mounted on the slide plate (10), and the screw screw (12) is locked to the bearing case (14). The described gate valve.

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