JP2017125567A - Repair valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair valve capable of adjusting an opening of a valve element.SOLUTION: A repair valve 1 includes a valve casing 2 having a valve seat 16, a valve element 3 for opening and closing a flow passage 6 in the valve casing 2, and valve stems 4 and 5 rotating the valve element 3, and is attached to a water pipe. The repair valve 1 further includes an intermediate opening lock mechanism 31 which locks the valve element 3 in an intermediate opening state by projection/recess engagement between the valve casing 2 and the valve stem 5. The intermediate opening lock mechanism 31 includes a lock plate 32 attached to the valve casing 2 and having an intermediate opening position hole, and an arm member 36 attached to the valve stem 5 to be integrally rotatable and having a lock bolt 39 fitted to the intermediate opening position hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a repair valve.

  The thing of patent document 1 is mentioned as a repair valve attached to a water pipe. Patent Document 1 describes a technique in which a ball valve type repair valve is provided between a water pipe and a fire hydrant with an air valve.

  Moreover, the thing of patent document 2 is mentioned as a valve which made the valve body and the valve seat non-sliding. In Patent Document 2, the first shaft (one valve rod) is connected to the valve body so as to be able to transmit rotation, while the second shaft (the other valve rod) is connected so as not to be able to transmit rotation, A ball valve is described in which a pressing portion is provided and a pressed portion that is pressed by the pressing portion is provided on the valve body. According to this ball valve, the valve body is opened and closed by rotating the first shaft, and only when the valve body is fully closed, the second shaft is rotated to press the pressing portion against the pressed portion. Is in close contact with the seat member (valve seat).

JP 2003-253707 A JP 2008-95811 A

  The repair valve is normally used in a fully open state, and is used only for repairing and maintaining the target device such as a fire hydrant with an air valve connected downstream, and to temporarily shut off the running water from the water pipe. It is done. That is, the conventional repair valve is based on the premise that the valve body is used in a fully open state or a fully closed state, and thus does not have a structure for fixing the valve body at an intermediate opening. However, in recent years, it has been increasingly used for drainage work and emergency water supply in the event of a disaster. In this case, if the valve is fully open, the amount of water may be excessive.

  Further, according to the technique of Patent Document 2, one valve stem is connected to the valve body so as to be capable of rotational transmission, and the other valve stem is connected so as not to be capable of rotational transmission. There is a problem that becomes complicated. In addition, since two valve rods need to be rotated, two rotation operation mechanisms such as a lever are also required, the valve becomes larger and the opening / closing operation procedure becomes complicated.

  The present invention was created in order to solve such problems, the opening degree of the valve body can be adjusted, the connection structure between the valve body and the valve stem is simplified, and the valve stem can be simply rotated. An object of the present invention is to provide a repair valve that can open and close a valve body without sliding.

  In order to solve the above-mentioned problems, the present invention comprises a valve box provided with a valve seat, a valve body that opens and closes a flow path in the valve box, and a valve rod that rotates the valve body, and a water pipe A repair valve attached to the valve is provided with an intermediate opening degree locking mechanism that engages unevenly between the valve box and the valve stem and locks the valve body in an intermediate opening state.

  According to the present invention, since the intermediate opening degree locking mechanism that locks the valve body in the intermediate opening state is provided, the amount of water can be adjusted by adjusting the opening degree of the valve body.

  Further, according to the present invention, the intermediate opening degree locking mechanism is attached to the valve box, a lock plate in which a recess is formed, and a movable lock member that is attached to the valve rod so as to be integrally rotatable and engages with the recess. An arm member.

  According to the present invention, an intermediate opening degree locking mechanism having a simple structure and excellent assemblability is provided.

  In addition, the present invention provides a connection mechanism for connecting the valve body to the valve stem so that the valve body can be rotated and linearly movable in a direction orthogonal to the valve stem axis, and the valve body in a neutral position in the orthogonal direction. An urging member that urges, and a pressing mechanism that is provided between the valve box and the valve body and presses the valve body against the valve seat against the urging force of the urging member when the valve body is closed. And.

  The present invention provides a connecting mechanism for the valve body and the valve stem, wherein the valve body is connected to the valve stem so that the valve body can be rotated and linearly movable in a direction orthogonal to the valve stem axis. Regarding the pressing mechanism that presses against the valve seat, it is provided not between the valve body and the valve rod as in Patent Document 2, but between the valve box and the valve body. As a result, the connection mechanism between the valve body and the valve stem is simple, and as in Patent Document 2, one valve rod is connected to the valve body so as to be able to transmit rotation, and the other valve rod cannot be transmitted to the rotation. There is no need to connect to. In addition, since it is not necessary to rotate the two valve rods separately, the valve can be made smaller and the opening / closing operation procedure is simplified.

  According to the present invention, the valve body can be held at an intermediate opening. Further, the connection structure between the valve body and the valve stem is simplified, and the valve body can be opened and closed without sliding by a simple rotation operation of the valve stem.

It is a sectional side view which shows the fully open state of the repair valve which concerns on this invention. It is a sectional side view which shows the fully closed state of the repair valve which concerns on this invention. (A) is AA sectional drawing of FIG. 1, (b) is BB sectional drawing of FIG. It is C arrow line view of FIG.

  In FIG. 1, a repair valve 1 includes a valve box 2, a ball valve body (hereinafter simply referred to as a valve body) 3 that opens and closes a flow path 6 in the valve box 2, and valve rods 4 and 5 that rotate the valve body 3. And. The repair valve 1 is interposed between a water pipe (not shown) and an air valve (not shown).

  The valve box 2 is divided into a first valve box 7 and a second valve box 9. The first valve box 7 includes a first flange portion 10 formed around one opening of the flow path 6 and connected to the opposite pipe, and one valve rod extending in a direction orthogonal to the flow path 6. A cylindrical valve stem support portion 13 that supports 5 and a cylindrical valve stem support portion 11 that extends in a direction orthogonal to the flow path 6 and supports the other valve rod 4 are formed. A flange portion 14 for attaching a lock plate 32 to be described later is formed at the tip of the valve stem support portion 13. A flange portion 12 for attaching a retaining member 25 to be described later is formed at the tip of the valve stem support portion 11. The second valve box 9 is formed with a second flange portion 15 that is formed around the other opening of the flow path 6 and connected to the opposite pipe. The first valve box 7 and the second valve box 9 are assembled with each other by bolts (not shown) with appropriate watertight seal members interposed therebetween. A ring-shaped valve seat 16 is assembled to the first valve box 7 with bolts 17.

  The valve body 3 has a substantially spherical shape in which a pair of plane portions parallel to each other is formed. A through hole 18 is formed on the pair of plane portions, and a pair of short columnar support shaft portions 19, 20 protrudes in a direction orthogonal to the through hole 18. Valve shafts 4 and 5 are connected to the support shaft portions 19 and 20 via connection mechanisms 41 described later. The valve stem 4 is rotatably supported on the inner peripheral surface of the valve stem support 11, and watertight seal members 21 and 21 are interposed between the two. A small-diameter lever mounting shaft portion 22 is formed at the distal end of the valve stem 4, and the base end portion of the lever 23 for rotating operation is fastened and fixed to the lever mounting shaft portion 22 by a bolt 24. The valve rods 4 and 5 and the valve body 3 are rotated around the valve shaft axis O <b> 1 by the rotation operation of the lever 23. A retaining member 25 that prevents the valve stem 4 from coming off by abutting against the stepped surface around the lever mounting shaft portion 22 of the valve stem 4 is fastened and fixed to the flange portion 12 by bolts 26. The valve stem 5 is rotatably supported on the inner peripheral surface of the valve stem support portion 13, and watertight seal members 27, 27 are interposed therebetween.

"Intermediate opening lock mechanism"
Normally, since the ball valve is used in a fully open state or a fully closed state, the valve body is not structured to be held (locked) at an intermediate opening. On the other hand, the repair valve 1 of the present invention is provided with an intermediate opening degree locking mechanism 31 that engages the concave and convex portions between the valve box 2 and the valve stem 5 and locks the valve body 3 in the intermediate opening state. . The intermediate opening degree locking mechanism 31 is attached to the valve box 2, and is provided with a lock plate 32 having a recess, and an arm member 36 having a movable lock member that is attached to the valve stem 5 so as to be integrally rotatable and engages with the recess. And. Specifically, a ring-shaped lock plate 32 is fastened and fixed to the flange portion 14 by bolts 33. As shown in FIG. 4, in the lock plate 32, as shown in FIG. 4, a fully open position hole 34A for locking the fully open position of the valve body 3 along the circumferential direction of the valve stem axis O1, and an intermediate opening position A plurality of (three in the figure) intermediate opening position holes 34B, 34C, and 34D for locking and a fully closed position hole 34E for locking the fully closed position are drilled.

  On the other hand, in FIG. 1, a small-diameter arm mounting shaft portion 35 is formed at the tip of the valve stem 5, and the base end portion of the arm member 36 is fastened and fixed to the arm mounting shaft portion 35 by a bolt 37. A through hole along the valve shaft axis O1 is formed on the distal end side of the arm member 36, and a nut 38 is fixed to one surface of the arm member 36 by welding or the like so as to overlap the through hole. A lock bolt 39 as a movable lock member is screwed onto the nut 38, and when the lock bolt 39 is tightened, the tip of the lock bolt 39 is opened through the through hole to the fully open position hole 34A, the intermediate opening degree. The position holes 34B, 34C, 34D and the fully closed position holes 34E are engaged with each other. In FIG. 4, when the rotation angle of the valve body 3 when locked by the fully opened position hole 34A is 0 °, the rotation angle of the valve body 3 in the fully closed position hole 34E is 90 °, and the intermediate opening position hole The values at 34B, 34C, and 34D are, for example, 30 °, 45 °, and 60 °, respectively.

  Next, in FIG. 1, the repair valve 1 includes a connecting mechanism 41 that connects the valve body 4 to the valve rods 4 and 5 so that the valve body 3 can be rotated and linearly movable in a direction orthogonal to the valve shaft axis O <b> 1, An urging member 42 that urges the body 3 to a neutral position P1 in a direction orthogonal to the valve stem axis O1, and a urging member 42 provided between the valve box 2 and the valve body 3 and when the valve body 3 is closed. And a pressing mechanism 43 that presses the valve body 3 against the valve seat 16 against the urging force.

"Coupling mechanism"
The connecting mechanism 41 is formed in connecting shafts 44 and 44 formed in the support shaft portions 19 and 20 of the valve body 3 along a direction orthogonal to the valve stem axis O1 and the valve stems 4 and 5, and can be rotated together. Connecting pins 45, 45 having a simple cross-sectional shape and loosely fitted in the connecting grooves 44, 44. As shown in FIGS. 3A and 3B, a connecting pin 45 having a quadrangular cross section as viewed from the direction of the valve stem axis O1 is formed on the base end surface of the valve stem 4. The connection pin 45 can be rotated with the valve body 3 by pressing the side surface of the connection groove 44 against the connection groove 44 formed on the end surface of the support shaft portion 19 of the valve body 3, and It is loosely fitted along the connecting groove 44 so as to be movable. The connecting mechanism 41 between the valve stem 5 and the support shaft portion 20 has a similar structure.

"Biasing member"
The urging member 42 includes a spring member disposed inside the connection groove 44. The spring member is, for example, a compression coil spring, a compression leaf spring, or the like, and the first spring member 42A is disposed between the groove wall at one end in the direction orthogonal to the valve shaft axis O1 of the connection groove 44 and the connection pin 45. A second spring member 42 </ b> B is disposed between the groove wall at the other end in the direction orthogonal to the valve stem axis O <b> 1 of the connection groove 44 and the connection pin 45. Due to the balance between the urging force of the first spring member 42A and the urging force of the second spring member 42B, the valve body 3 is always urged so as to be positioned at the neutral position P1. The neutral position P1 is a position on the valve stem axis O1. When the valve body 3 is in the neutral position P1, a gap T is formed between the valve body 3 and the valve seat 16.

"Pressing mechanism"
The pressing mechanism 43 includes a position adjusting bolt 46 that is screwed to the valve box 2 so that the position can be adjusted, and a boss portion 47 that protrudes from the valve body 3 and contacts the tip of the position adjusting bolt 46. Yes. Boss portions 47 each having a spherical shape project from the outer periphery of the support shaft portion 19 and the support shaft portion 20 of the valve body 3. A pair of position adjusting bolts 46 are screwed into the valve box 2 so as to correspond to the pair of boss portions 47. A hexagonal hole for inserting a hexagonal tool is formed on the base end face of the position adjusting bolt 46 facing the outside of the valve box 2. By adjusting the screwing position of the position adjusting bolt 46 by inserting a hexagonal tool into the hexagonal hole, the force with which the tip of the position adjusting bolt 46 presses the boss portion 47, that is, the force with which the valve body 3 is pressed against the valve seat 16 is adjusted. The A watertight seal member 48 is interposed between the position adjusting bolt 46 and the valve box 2 (second valve box 9).

"Action"
As shown in FIGS. 1 and 3A, when the repair valve 1 is in the open state, the valve body 3 is in the neutral position P1 due to the balance between the urging force of the first spring member 42A and the urging force of the second spring member 42B. Is located. The position of the valve body 3 in the open state is maintained by engaging the tip of the lock bolt 39 with the fully open position hole 34 </ b> A of the lock plate 32. In this state, the tip of the position adjusting bolt 46 and the boss portion 47 are not in contact with each other, and a gap T is formed between the valve body 3 and the valve seat 16. This gap T continues to be formed until the non-sliding valve 1 is almost fully closed and the tip of the position adjusting bolt 46 presses the boss portion 47. As a result, the valve body 3 does not slide on the valve seat 16 in accordance with the opening / closing operation of the non-sliding valve 1, so that the wear of the valve seat 16 can be reduced, and the maintenance frequency and replacement frequency of the valve seat 16 are reduced. it can.

  When the repair valve 1 is desired to have an intermediate opening, the lock bolt 39 is loosened and the tip of the lock bolt 39 is removed from the fully open position hole 34A, and then the lever 23 is operated to move the valve body 3 around the valve stem axis O1. Are rotated by a predetermined rotation angle (30 °, 45 °, 60 ° in this embodiment), the lock bolt 39 is tightened, and the tip of the lock bolt 39 is engaged with the predetermined intermediate opening position holes 34B, 34C, 34D. Let

  2 and 3B, when the engagement lever 23 is operated to rotate the valve body 3 by 90 ° from the fully opened state, the boss portion 47 abuts against the tip of the position adjusting bolt 46 immediately below. By being pressed, the valve body 3 moves downward from the neutral position P1 against the urging force of the first spring member 42A. And in the fully closed state which moved the distance S, the valve body 3 is pressed against the valve seat 16, and the repair valve 1 will be in a fully closed state. Thereafter, the tip of the lock bolt 39 is engaged with the fully closed position hole 34E, and the fully closed position of the valve body 3 is maintained.

  As described above, if the structure including the intermediate opening locking mechanism 31 that engages the concave and convex portions between the valve box 2 and the valve stem 5 and locks the valve body 3 in the intermediate opening state, the structure is simple. The opening of the valve body, that is, the amount of water can be adjusted.

  Further, the intermediate opening degree locking mechanism 31 is attached to the valve box 2 and attached to the lock plate 32 formed with recesses (intermediate opening position holes 34B, 34C, 34D) and the valve stem 5 so as to be integrally rotatable. If the structure includes an arm member having a movable lock member (lock bolt 39) that engages with the recess, the intermediate opening degree lock mechanism 31 is simple in structure and easy to assemble.

  Further, a connecting mechanism 41 for connecting the valve body 3 to the valve stem axis O1 so as to be able to rotate the valve body 3 with respect to the valve stems 4 and 5 and linearly move in a direction orthogonal to the valve stem axis O1. An urging member 42 that urges the neutral position P1 in the orthogonal direction, and the valve body 3 against the urging force of the urging member 42 provided between the valve box 2 and the valve body 3 when the valve body 3 is closed. According to the repair valve 1 including the pressing mechanism 43 that presses the valve seat 16 against the valve seat 16, the following effects are exhibited.

  As a connecting mechanism 41 between the valve body 3 and the valve rods 4 and 5, the valve body 3 is connected to the valve rods 4 and 5 so that the valve body 3 can be rotated and linearly movable in a direction orthogonal to the valve shaft axis O1. The pressing mechanism 43 that presses 3 against the valve seat 16 is provided between the valve box 2 and the valve body 3. As a result, the connecting mechanism 41 between the valve body 3 and the valve rods 4 and 5 can be a simple structure. As in the prior art, one valve rod is connected to the valve body so as to be able to transmit rotation, and the other valve rod is connected to the valve body. There is no need to connect them so that rotation cannot be transmitted. In addition, since it is not necessary to rotate the two valve rods separately, the valve can be made smaller and the opening / closing operation procedure is simplified.

  Further, the connecting mechanism 41 has a connecting groove 44 formed in the valve body 3 along the direction orthogonal to the valve stem axis O1 and a cross-sectional shape formed in the valve stems 4 and 5 so as to be able to rotate. If the connecting pin 45 is loosely fitted in the connecting groove 44 and the biasing member 42 is a spring member disposed inside the connecting groove 44, the structure of the connecting mechanism 41 can be further simplified.

  Further, the first spring member 42 </ b> A in which the spring member is disposed between the groove wall at one end in the direction orthogonal to the valve stem axis O <b> 1 of the connection groove 44 and the connection pin 45, and the valve stem axis O <b> 1 of the connection groove 44. If the second spring member 42B is disposed between the groove wall at the other end in the orthogonal direction and the connecting pin 45, the arrangement structure of the spring member can be simplified.

  Further, the pressing mechanism 43 includes a position adjusting bolt 46 screwed to the valve box 2 so that the position can be adjusted, and a boss portion 47 that protrudes from the valve body 3 and contacts the tip of the position adjusting bolt 46. If it does so, the pressing force of the valve body 3 to the valve seat 16 can be adjusted easily.

  The preferred embodiment of the present invention has been described above. In the embodiment, the lock bolt 39 is used as the movable lock member of the intermediate opening lock mechanism 31. However, an index plunger that is constantly urged so as to engage with the recess may be used. In the embodiment, the valve rods 4 and 5 are rotated by a rotation operation around the valve shaft axis O1 of the lever 23. However, not only the lever 23 but, for example, the valve rods 4 and 5 are rotated via a gear mechanism such as a bevel gear by a rotating handle (rotating cap) that rotates around a vertical axis (vertical axis in FIG. 1). It may be a structure to be moved. In addition to the manual valve, the valve rods 4 and 5 may be rotated as an automatic valve such as an electric valve.

DESCRIPTION OF SYMBOLS 1 Repair valve 2 Valve box 3 Valve body 4,5 Valve rod 6 Flow path 16 Valve seat 31 Intermediate opening degree lock mechanism 32 Lock plate 34B-34D Intermediate opening position hole 36 Arm member 39 Lock bolt (movable lock member)
41 connecting mechanism 42 biasing member 43 pressing mechanism 44 connecting groove 45 connecting pin 46 position adjusting bolt 47 boss portion O1 valve stem axis P1 neutral position

Claims (3)

A valve box provided with a valve seat, a valve body that opens and closes a flow path in the valve box, a valve rod that rotates the valve body, and a repair valve that is attached to a water pipe,
A repair valve comprising an intermediate opening degree locking mechanism that engages unevenly between the valve box and the valve stem and locks the valve body in an intermediate opening state. The intermediate opening lock mechanism is
A lock plate attached to the valve box and formed with a recess;
An arm member attached to the valve stem so as to be integrally rotatable and having a movable lock member engaged with the recess;
The repair valve according to claim 1, further comprising: A coupling mechanism that couples the valve body to the valve stem so as to be able to rotate and linearly move in a direction orthogonal to the valve stem axis;
A biasing member that biases the valve body to a neutral position in the orthogonal direction;
A pressing mechanism which is provided between the valve box and the valve body and presses the valve body against the valve seat against the biasing force of the biasing member when the valve body is closed;
The repair valve according to claim 1, further comprising:

Images