JP3622121B2 - Adapter for dry-type closure sprinkler head - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an adapter for a dry type closed sprinkler head.
[0002]
[Prior art]
FIG. 3 is an explanatory view of the configuration of a conventional adapter for a dry type closed sprinkler head (Japanese Patent Laid-Open No. 4-150873), and FIG. 4 is a perspective sectional view of the main part of FIG.
3 and 4, 10 is a main body, 13 is a set screw, 20 is a valve seat, 30 is a valve body provided with a ring-shaped packing, 40 is a support shaft, 50 is a holder formed with a protrusion 51, and 60 is a hole. A stem cover provided with 64, a compression spring 63 for retaining the stem cover 60, a stem 70 formed with a groove 73, a connecting shaft 80, and a compression spring 83 for pushing down the entire support shaft 40.
[0003]
Reference numeral 65 denotes a ring for preventing the stem cover 60 from rising, 72 denotes a compression spring for raising the stem 70, and 74 denotes a ball. When the ball 74 is in a normal state, as shown in FIG. 3, the ball 74 is pinched between the protrusion 51 and the groove 73 in the hole 64 to be prevented from moving. P is a pipe, S is a sprinkler head, L is a disassembled portion of the sprinkler head S, N is a nozzle, and V is a valve. The sprinkler head S is screwed partway into the female screw 12 and attached to the main body 10.
[0004]
In the conventional dry type closed sprinkler head adapter having such a configuration, when a fire occurs and the sprinkler head S is operated and the valve V is lowered, the entire support shaft 40 is pushed down by the compression spring 83. When the support shaft 40 is lowered, the ball 74 comes out of the protrusion 51 and the groove 73, and the stem 70 is pushed up by the compression spring 72. Then, the entire length of the support shaft 40 is reduced, the valve seat 20 and the nozzle N are opened, and the air in the pipe P is released from the sprinkler head S. As a result, the pump of the water source rotates and water is sent into the pipe P, and water is sprinkled from the activated sprinkler head S.
[0005]
[Problems to be solved by the invention]
In the invention of the conventional dry type closed sprinkler head adapter having the above-described configuration, the stem 70 at the tip of the support shaft 40 rises above the nozzle N of the sprinkler head S, so that the nozzle diameter is reduced to reduce the amount of water spray. There is a feature that there is no. However, on the other hand, the following problems a to d can be cited.
[0006]
a. The stem cover 60, the holder 50, and the main body 10 are wrapped around the outside of the stem 70, which slides in contact with the valve V. In addition, two compression springs 63 and 72 and a ball 74 are interposed in the gap between the inside and outside of the stem cover 60. Therefore, the structure is complicated and the assembly becomes troublesome corresponding to the thickness of the thin support shaft 40, and the core of the holder 50 held in an indefinite position in the hollow space of the main body 10 by the screwing condition of the three set screws 13. Matching is also extremely difficult.
[0007]
b. When the sprinkler head S is not in operation (at the time of warning), the valve body 30 is brought into contact with the valve seat 20 at a constant pressure, and the distal end side of the stem 70 is also brought into contact with the valve V without any gap to keep the inside of the main body 10 airtight. It is necessary.
However, since the stopper mechanism is not substantially provided for screwing the sprinkler head S, the contact pressure and the like described above vary significantly depending on the screwing depth to the female screw 12. Therefore, a problem is likely to occur in the airtightness between the upper and lower valve bodies 30 and the valve V.
[0008]
c. The following three forces are applied to the valve V from the tip of the stem 70 via the support shaft 40.
(1) Reaction force F1 equal to the contact pressure with which the valve body 30 presses the valve seat 20
(2) Force F2 that the compressed air sealed in the pipe P pushes the valve body 30 downward
(3) Force F3 that the compression spring 83 pushes the spindle 40 downward
F1 is equal to the contact pressure described in b. Even if this force is obtained as designed at the time of assembly, if the resultant force of these three forces exceeds the force that seals the valve V, the airtightness of the valve V Cause problems. Furthermore, since the air pressure in the pipe P varies, F2 also varies. A sprinkler head in which the force for sealing the valve V is set to be particularly large, which can cope with the F2 force having this variation and the resultant force of F1 and F3, is required. That is, the conventional normal sprinkler head cannot be used.
d. The compression spring 63 is provided to be placed above the stem cover 60 during assembly (upper left column on page 499), has no function that directly contributes to the watering operation, and the number of parts increases accordingly.
[0009]
The present invention has been made to solve the problems of the conventional adapter for a dry type closed sprinkler head . The present invention is simple in construction, easy to assemble, and uses a normal closed sprinkler head without difficulty. An object of the present invention is to realize a dry type closed sprinkler head adapter .
[0010]
[Means for Solving the Problems]
In this invention, the piston provided in the joint pipe is caused to follow the lowering at the time of operation of the valve provided to the nozzle of the sprinkler head by the expansion force of the spring, and the locking of the engaging means using the steel ball is released. By reacting the valve rod in the joint pipe and the valve body connected to the valve stem, the valve seat and the nozzle screwed in the joint pipe are opened to eliminate the air pressure in the water supply pipe, and in dry-type closure sprinkler head adapter watering by introducing pressurized water into the joint pipe, the valve seat and the valve body by sliding contacts to open by raising the accompanying valve body to release the engagement of the engagement means This is a dry type closed sprinkler head adapter .
Moreover, the adapter for dry-type closure sprinkler heads provided with the control means which controls the screwing depth of the sprinkler head fixed to a joint pipe with a screw | thread is comprised.
Furthermore, a dry type closed sprinkler head is constructed in which the spring is constituted by two springs, an outer spring and an inner spring, the piston is lowered by the inner spring and the valve body is raised by the outer spring.
[0011]
[Action]
When the head is not in operation (at the time of warning), the steel ball of the engaging means is locked, and the valve body is held in the locking position inside the joint pipe . Both the outer spring and the inner spring are kept in a compressed state, and the valve body connected to the valve stem is stopped in the valve seat with the lower end of the piston contacting the valve of the head nozzle, and the air pressure in the water supply pipe Is blocked.
[0012]
When a fire breaks out, the head mounted on the ceiling detects the heat of the fire, the separating part separates and the valve descends. At the same time, the piston responds and is pushed down under the spring pressure of the inner spring. Therefore, engagement by the steel ball engaging means is released, a strong expansion force of with outer spring which is added to the valve body and raises the valve body.
[0013]
As a result, the valve seat and the nozzle are opened, the compressed air in the water supply pipe flows out from the head, the pump of the water supply pipe is driven, and fire-fighting water is sent to the head through the joint pipe and sprayed on the floor surface. ing.
[0014]
【Example】
Example 1.
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing the structure of an embodiment of the present invention. In the embodiment of the present invention, different names and symbols are given to some equivalent parts of the conventional apparatus.
In FIG. 1, reference numeral 1 denotes a main body of an adapter for a dry type closed sprinkler head. 2 is a joint pipe of the main body 1, 3 is an upper connector provided with a cylindrical valve seat 31 at the open end, and 4 is a combined lower connector comprising two inner and outer cylinders 41 and 42 which are screwed together. The upper and lower connectors 3 and 4 are screwed into female screws 21 and 22 formed above and below the joint pipe 2, respectively. Further, a projecting portion 44 provided with a female screw 43 and a drain hole 45 are provided on the inner peripheral surface of the inner cylinder 41 of the lower connector 4, and a step portion 46 is formed on the inner peripheral surface of the outer cylinder 42.
[0015]
Reference numeral 5 denotes a joint shaft. 51 is a valve body in the joint shaft 5, 52 is a valve stem, and 53 is a pin. An O-ring 54 is wound around the outer periphery of the valve body 51, and comes into air-tight sliding contact within the valve seat 31 of the upper connector 3. 55 is a spring pin, 56 is a ring, and 57 is an external spring interposed between the ring 56 and the lower connector 4. The spring pin 55 is press-fitted into a hole penetrating in the diameter direction of the pin stopper 53, and applies an expansion force of the outer spring 57 to the joint shaft 5 through the ring 56.
[0016]
Reference numeral 58 denotes a connecting cylinder, and 59 denotes a cylinder coupled to the connecting cylinder 58 with a screw 61. The connecting cylinder 58 is fitted to the lower part of the pin stopper 53 and is screwed into the male screw 62 at the lower end to connect the cylinder 59 to the pin stopper 53. 63 is a sliding hole penetrating the axis of the cylinder 59, and 64 (see FIG. 2) is a holding hole. Also, 65 is an inner spring, 66 is a piston having a spring receiver 67 and a locking rod 68, and 69 is a steel ball. The holding holes 64 are formed to have a size into which the steel balls 69 can be inserted. Although not shown in all, the holding holes 64 are provided in the cylindrical portion of the cylinder 59 at three equiangular intervals.
[0017]
Then, the piston 66 and the joint shaft 5 or the like provided in the joint pipe 2, response following the operation of the sprinkler head to be described next. 7 is a sprinkler head (hereinafter simply referred to as a head), 71 is a nozzle of the head 7, 72 is a sealing plate, 73 is a valve, 74 is a separation part, and 75 is a heat sensitive part. The head 7 is attached to the lower connector 4 by pressing the flat portion 76 of the nozzle 71 against the protruding portion 44 and screwing a male screw. 8 is a ceiling, and 9 is a water supply pipe to which the upper connector 3 is connected.
[0018]
The embodiment of the present invention having such a configuration is assembled as follows.
a. The piston 66 and the inner spring 65 are put into the cylinder 59, and the connecting cylinder 58 is screwed in until it comes into contact with the surface.
b. The assembly part a is inverted, and the piston 66 is pulled toward the connecting cylinder 58 by a jig, and the inner spring 65 in the cylinder 59 is compressed from above while the locking rod 68 comes to the position of the holding hole 64. The outer cylinder 42 of the lower connector 4 is fitted into the cylinder 59, and three steel balls 69 are sequentially inserted to drop the steel balls 69 into the stepped portion 46. By this pulling operation on the connecting tube 58 side, the steel balls 69 are respectively engaged with the stepped portion 46 and the locking rod 68 of the lower connector 4 inside the holding holes 64 as shown in FIG.
[0019]
c. The head 7 is connected to the inner cylinder 41 of the lower connector 4. At this time, the flat portion 76 on the head 7 side is pressed against the projecting portion 44 on the lower connector 4 side, and is screwed to a specified screwing depth so that the inner tube 41 faces the outer tube 42 of the assembly part b. Screw in until it hits. Then remove the jig b.
d. The connecting cylinder 58, the pin stopper 53, the valve stem 52, and the valve body 51 are coupled with screws.
Also in this case, the surface is surely contacted and the axial length is made uniform.
e. For the next press-fitting operation of the spring pin 55, a cylindrical or annular jig and a press-fitting jig with a push rod are used. Although a detailed description is omitted, the outer spring 57 is held in a compressed state from above the ring 56 with a cylindrical or annular jig, and the spring pin 55 is press-fitted into the pin stopper 53 from the diametrical direction.
[0020]
f. Thereafter, an O-ring and a cap seal are attached to the valve body 51, the joint pipe 2 and the upper connector 3 are screwed to the lower connector 4, and the assembly of the main body 1 is completed. During assembly, an adhesive is applied to the threaded part of each part as necessary to maintain airtightness, and a lubricant such as grease is applied to the sliding part to facilitate operation. Is processed.
[0021]
Next, the watering operation of the embodiment of the present invention will be described next.
When the head 7 is not in operation (at the time of warning), the upward pressing force of the outer spring 57 is sufficiently higher than the downward pressing force of the valve body 51 due to the air pressure of the compressed air sealed in the water supply pipe 9. Since it is set large, the valve body 51 does not move downward and the valve seat 31 does not come off. Further, since the steel ball 69 in the holding hole 64 is locked to the step portion 46, the joint shaft 5 is moved upward by the pressing force of the outer spring 57 upward, and the valve body 51 is moved upward to move the valve seat. There is no way out of 31. In this way, the three steel balls 69 are respectively locked inside the holding holes 64 by the stepped portion 46 and the locking rod 68 of the lower connector 4, and the joint shaft 5 is held in the state shown in FIG. . Further, the force from the air pressure or the like in the water supply pipe 9 is not transmitted to the valve 73 via the joint shaft or the piston, and is pushed down only by the compression force of the inner spring 65 via the piston 66. Therefore, since the valve 73 is pressed with a light force capable of pushing down the piston 66, the valve 73 does not require a sprinkler head having a special sealing force. The outer spring 57 and the inner spring 65 are both kept in compression, the lower end of the piston 66 is in contact with the valve 73, the valve body 51 is stopped in the valve seat 31, and the air pressure in the water supply pipe 9 is increased. Blocked.
[0022]
When a fire occurs, the head 7 attached to the ceiling 8 detects the heat of the fire, the separating portion 74 is separated, and the valve 73 is lowered. At the same time, the piston 66 is pushed down under the spring pressure of the inner spring 65. For this reason, the steel ball 69 locked to the step portion 46 and the locking rod 68 is drawn in the axial direction of the piston 66 and falls between the spring receiver 67 and the locking rod 68 to lock the ring 56. To release.
[0023]
Then, the expansion force of the outer spring 57 is applied to the ring 56, and the joint is integrated with the cylinder 59 until the spring pin 55 comes into contact with the upper connector 3 or the valve body 51 comes into contact with the upper inner wall of the water supply pipe 9. The shaft 5 is raised. As a result, the valve seat 31 and the nozzle 71 are opened, the air pressure in the water supply pipe 9 flows out from the head 7, a pump (not shown) is driven, and pressurized water for fire extinguishing is sent to the head 7 through the main body 1. Water is sprayed on the floor.
[0024]
The state of the main body 1 at this time is shown in FIG. As shown in the drawing, when the head 7 is operated, the piston 66 slightly protrudes from the cylinder 59 and moves upward together with the joint shaft 5.
[0025]
In the above-described embodiment of the present invention, the lower connector 4 in which the inner cylinder 41 and the outer cylinder 42 are combined has been described as an example. However, the lower connector 4 is formed by integrating the inner cylinder 41 and the outer cylinder 42. Alternatively, a valve seat may be provided on the joint pipe. In addition to the link-type sprinkler head, the separating portion 74 may be a metal melting type sprinkler head or the like, and the assembly jig is not necessarily limited to the embodiment.
[0026]
【The invention's effect】
In this invention, the piston provided in the joint pipe is caused to follow the lowering at the time of operation of the valve provided to the nozzle of the sprinkler head by the expansion force of the spring, and the locking of the engaging means using the steel ball is released. By reacting the valve rod in the joint pipe and the valve body connected to the valve stem, the valve seat and the nozzle screwed in the joint pipe are opened to eliminate the air pressure in the water supply pipe, and in dry-type closure sprinkler head adapter sprinkling pressurized water is introduced into the body, the valve seat and the valve body by sliding contacts to open by raising the accompanying valve body to release the engagement of the engagement means dry An adapter for mold closure sprinkler head was constructed.
Moreover, the adapter for dry type closed sprinkler heads provided with the control means which controls the screwing depth of the sprinkler head fixed to a joint pipe with a screw was constituted.
Furthermore, a dry type closed sprinkler head adapter is constructed in which the spring is constituted by two springs, an outer spring and an inner spring, the piston is lowered by the inner spring and the valve body is raised by the outer spring.
[0027]
As a result, the spring used only during assembly as in the conventional device is also rather non-piston because not held in Astatic the hollow space of the body, assembly and centering structure is simple is very easy. Further, since the valve body is in sliding contact with the valve seat, the tip of the piston can be brought into contact with the valve of the sprinkler head with a predetermined light pressure regardless of the contact pressure between the valve body and the valve seat. In particular, since the sprinkler head is screwed with a restricting means for restricting the screwing depth, the assembly becomes easier. Therefore, there is no problem in the airtightness between the upper and lower valve bodies and the valve.
[0028]
Therefore, according to the present invention, it is possible to provide an adapter for a dry type closed sprinkler head that is simple in construction and easy to assemble and that can use a normal closed type sprinkler head without difficulty.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an embodiment of the present invention.
FIG. 2 is an operation explanatory diagram of an embodiment of the present invention.
FIG. 3 is a configuration explanatory view of a conventional adapter for a dry type closed sprinkler head.
4 is a perspective sectional view of the main part of FIG. 3;
[Explanation of symbols]
1 Body 2 Joint pipe 5 Joint shaft 7 Sprinkler head 8 Ceiling 9 Water supply pipe 31 Valve seat 46 Step part 51 Valve body 52 Valve rod 57 Outer spring 59 Cylinder 63 Sliding hole 64 Holding hole 65 Inner spring 66 Piston 68 Locking rod 69 Steel ball 71 Nozzle 73 Valve 74 Separation part (decomposition part)
76 Plane section

Claims (3)

A piston provided in the joint pipe by following the drop in during operation of a valve provided in the nozzle of the sprinkler head by expansion force of the spring, the joint pipe by releasing the engagement of the engaging means utilizing steel balls The valve seat and the valve body coupled to the valve stem are caused to react to release the valve seat and the nozzle screwed into the joint pipe to eliminate the air pressure in the water supply pipe, and then pressurize water for fire extinguishing. in the dry-type closure sprinkler head adapter watering is introduced into the joint pipe,
An adapter for a dry-type closure sprinkler head , wherein the valve seat is lifted by sliding the valve seat and the valve body together with the release of the engagement means. 2. The dry type closed sprinkler head adapter according to claim 1, further comprising a restricting means for restricting a screwing depth of a sprinkler head fixed to the joint pipe with a screw. 2. The dry type closed sprinkler head according to claim 1, wherein the spring is composed of two springs, an outer spring and an inner spring, and the piston is lowered by the inner spring and the valve body is raised by the outer spring . Adapter .

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