JPS61502778A - Water supply valve changing method and device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Valve closure sensing method and water supply valve The present invention relates to sensing the closed state of a water valve in a fire extinguishing system.

Sprinkler or similar fire extinguishing equipment technology It is common to have multiple gate valves or similar valves in the water supply line to the facility. . It is common practice to close the valve during inspection and maintenance of such fire extinguishing systems, but inadvertently The valve may be left closed, which could lead to a serious situation in the event of a fire. will be invited. In addition, the valve should not be closed when installing the fire extinguishing system by inexperienced workers. Sometimes they are left alone. Also, the valve is partially closed and has not been fully opened. or may be left completely closed. Furthermore, the valve was intentionally completely closed. They may also be closed to prevent the release of water in the event of a fire.

Until now, it has been used to detect the closed state of a valve and trigger an alarm device to notify people of danger. There have been proposals to do so. The valve has a magnetic actuation switch inserted into the valve member of the valve body. This makes it possible to detect when the valve is closed and detect when the valve gate is not in the fully open position. I was able to sense it. The problem with such devices is that the valve Holes had to be drilled in the housing and appropriate sensing elements placed in the valve member. It is a point. Besides the problem of sealing these openings to prevent leakage, there are still other problems. There are also problems. That is, since these sensing elements operate magnetically, these sensing elements It is a problem of attracting genus objects. Ordinary city water contains large amounts of metal particles This is well known. Therefore, over time, metal particles build up around the sensor. However, even when the valve is closed, the presence of these magnetic particles causes the sensor to detect the valve closed state. This will prevent the display of the status. Furthermore, this sensing element is inherently difficult to install. It is. This is done by draining the device prior to installation and then installing it in the valve casing. The girder must be effectively sealed before the switch can be installed. It's for a reason. The applicant detects the closed state of the valve gate using a sensor installed inside the valve member. rather than sensing the movement of some magnetic part of the valve outside of the valve housing. It turns out that the same purpose can also be achieved by using a magnetic switch. I paid attention. Water can be drained from the device by sensing the movement of such magnetic parts. This makes it possible to adapt it to existing equipment without having to do so. Furthermore, this Such an installation location will not be affected by the presence of metal particles contained in municipal water. It is not difficult to install.

The invention therefore provides a type of fire extinguishing system that can normally release water in the event of a fire. A method for sensing when a device's water valve is closed uses a magnetically actuated sensor at the valve. A magnet connected to the water supply valve outside the material and moved by opening and closing of the valve gate of the water supply valve. It is placed near the air part and triggers an alarm device when it senses that the valve gate is closed. The magnetically actuated sensor is configured to trigger the magnetically actuated sensor.

Furthermore, the present invention provides a fire extinguisher that supplies water from a water supply valve in the event of a fire. In a water supply valve of a fire extinguishing system, the closed state of the gate of the valve can be magnetically sensed. A sensor used to generate an output signal that activates an alarm device when conditions such as A sensor is installed outside the valve member, and this sensor is connected to a fire extinguisher, and the gate is closed. The present invention is characterized in that it is configured to provide an alarm display in response to the output signal.

Furthermore, the present invention provides a fire extinguishing system in which a magnetically actuated sensor is installed outside the valve member of the water supply gate valve. When used, it senses that the valve gate is closed, and the valve gate closes. It is characterized by generating an alarm display when the

Preferably, the sensor does not require electrical power to place the switch in the magnetic sensing state. A magnetically actuated switch is recommended.

This switch is a reed switch that does not require electrical power to enter the magnetic sensing state. It is good to say. However, even devices that require a power source to detect the opening and closing of contacts may be used. stomach.

In one embodiment, the sensor is configured to prevent the ferromagnetic material from deviating from the position of the sensor. to be detected. In other words, the ferromagnetic material is close to the sensor when the valve is open. close to the sensor and away from the sensor when the valve is closed. Due to this Activate the sensor so that it can trigger the alarm device.

The present invention will now be explained by describing some embodiments with reference to the drawings.

FIG. 1 is a front view of a typical gate valve incorporating a sensor according to the present invention; Figure 2 is a sectional view on line 2-2 of the m1 diagram, and Figure 3 is a perspective view of the sensor not shown in Figure 2. FIG. 4 is a front view of a different type of valve incorporating a sensor according to the invention; FIG. 5 is a side view of the valve of FIG. 4; FIG. 6 shows yet another type of % type % incorporating a sensor according to the present invention. FIG. 7 is a perspective view of different sensors; FIG. 8 is a sectional view of the assembled sensor of FIG. 7, and FIG. 9 is a sectional view of the sensor of FIG. FIG. 2 is a block diagram of an electrical circuit of a fire alarm control device incorporating a fire alarm control device.

In FIG. 1 a gate valve 1 with a valve gate 3 is shown. This valve gate 3 is made of brass. The valve stem 5 is connected to a threaded valve stem 5 made of steel or copper. The handles 7 are operatively connected to each other. rotating the handle 7 , the valve stem 5 is protruded or retracted to move the valve gate 3 into the valve body. 2 to open and close the gate valve. In this example, A sensor 11 having a magnetic switch in the form of a reed switch is placed on the outside of the valve housing. Install it in a position where it can detect the movement of the valve stem 5. This sensor 11 is a valve gate Sensing the closure of 3.

The sensor 11 is responsive to magnetic material 3 fitted into a hole 14 drilled in the valve stem 5. I will do it. The sensor 11 is in an alarm state when sensing the presence of the magnetic material 3. If the sensor detects that magnetic material 3 is not present, an alarm will be issued. Configure it so that it is in the same state. When the valve gate 3 is open, the voltage at the sensor 11 is Allow air contacts to open. When the valve gate 3 closes, the contact closes, which triggers the alarm signal. A signal that can generate a signal is supplied. Typically, magnetic The material 13 is inserted into the hole 14 and is a mild steel ingot. As an alternative, a permanent magnet may be placed in hole 14. It can also be inserted. The properties of the magnetic material depend on the properties of the sensor 11; If 1 is a reed switch, provide a magnet associated with this reed switch, and The ancient magnetic material can be mild steel or other ferromagnetic material. lead switch If the hole 14 does not have a magnet, the hole 14 is provided with a permanent magnet.

In the embodiment shown in FIG. 1, the magnetic material 13 is a permanent magnet. The sensor 11 reed switch without a permanent magnet to bias the reed switch to one operating position shall be. This reed switch is opened when the permanent magnet 13 is in the close position. This is a switch whose contacts close when the permanent magnet 13 moves from this position. paraphrase Then, when the valve gate 13 moves to the closed position, the magnetic material (permanent magnet) 13 , - away from the reed switch, and a signal is generated by the reed switch that senses this. and generates an alarm.

2 and 3 show a typical example of a sensor used in the valve shown in FIG. 1.

The sensor 11 is constituted by a hollow, substantially rectangular cast iron casting. casting The hollow rear end 15 of the body is closed by a lid 17 made of cast iron. The lid 17 has screws (not shown). ) is tightened to the cast body. A U-shaped notch 21 is formed in the front end 19 of the sensor 11. to be accomplished. This 1-shaped notch will be explained later.The central part 23 of the sensor 11 An aperture 25 is provided in the aperture 25, and an elite switch 27 is accommodated in the aperture 25. Typically, , this reed switch 27 is enclosed in a glass body, and the diameter of the opening 25 is the same as that of the reed switch. The glass body of the switch 27 can be closely and slidably fitted. At the front end of sensor 11 A large diameter opening 29 is provided at the end of the adjacent opening 25. This large diameter hole 29 is the hole 2 The hole should have a diameter larger than the diameter of 5. Fitting the reed switch 27 into the opening 25, One end of the reed switch 27 is aligned with the bottom surface of the U-shaped notch 21. Hollow end 1 5 and the large diameter opening 29 are filled with epoxy resin. Epoxy resin 31 is the sensor A reed switch 27 is connected and positioned to the main body of 11. 3 lead wires 3 3 from the reed switch 27, and pass it through the hollow end 15 to an appropriate opening (not shown). Pass it through the hole. The reed switch 27 has three leads and is connected to special equipment. Either a normally open contact type or a normally closed contact type can be selected depending on the need for protection.

This will be explained later. The center/south 11 is connected to a gate valve by an angle-shaped bracket 35. 1, and these brackets are attached to the side of the sensor 11 housing by bolts 37. The heads of these bolts 37 are connected to the sides of the housing of the sensor 11 by bolts. located within a T-shaped slot extending along the . The chevron-shaped bracket 35 is attached to the sensor 11. Position the sensor 11 at an appropriate position on the housing, and then open the sensor 11 housing before use. It is possible to attach a hole to the part 41 of the valve body. Mounting position is in front of sensor 11 The end of the reed switch 27 on the end 19 side is very similar to the drawing of the valve stem 5 of the gate valve 1. Select so that they are close to each other. The diameter of the curved portion of the U-shaped notch 21 is the same as that of the valve stem 5. It shall be larger than the diameter. A U-shaped cut is provided in the main body of the sensor 11 housing. The action of the cutout 21 is that of the ferromagnetic material surrounding the reed switch 27 and the valve stem 5. The goal is to increase the area. The reason for doing this is that the large magnet is 11 to maintain the reed switch contacts in a non-alarm state. This is to negate any attempt to do so. In this case, the sensor 11 housing book The size of the body has the effect of suppressing any magnetic flux generated from such external magnets. I do. Therefore, when the valve moves to the closed position, the reed switch 27 generates an alarm signal. do.

Figures 4 and 5 show other embodiments using different types of valves. This example Then, attach indicator 5 to the valve body IA. This indicator 51 It has a scale 53, and the gate open position and gate close position are displayed on this scale 53. It is. (These are omitted to make the drawing easier to read). indicator 5 1 carries a pointer 55, which is a threaded brass stem. It is connected to the frame 57 by a threaded collar 58, and the handle 59 When rotating the stem 57 to open and close the gate of the valve body IA, the stem is moved up and down. this In this way, the pointer 55 changes the scale according to the position of the valve gate within the valve body IA. At 53, a position indicating the opening/closing amount of the valve gate is taken. The principles of the invention can be applied to this type of game. When applied to an open valve, the sensor 11 is attached to the indicator 51, and the pointer The position of color 55 and -58 is detected. Therefore, the point made of ferromagnetic material is When the collar 58 of the interface 55 moves to the gate closing position, the sensor 11 sends an alarm signal. It operates to generate. The collar is made of cast iron or mild steel. In this example The sensor 11 has substantially the same structure as the embodiment described above.

However, when the collar 58 is in the gate open position, the permanent magnet opens the switch. It is assumed that there is a bias towards the situation. In this way, when the gate is closed, the collar 58 moves away from sensor 11, the reed switch transitions to the closed state, and triggers the alarm. Generates signals used in The sensor 11 has a scale 53 with a bolt (not shown). Attach it to the upper flange 61 of the mounting part of.

If required, the collar 58 may be made of brass and a permanent magnet may be inserted into the collar. Can also be done. In this case, connect this switch as a reed switch with a permanent magnet. There is no need to keep the points biased in the always open state.

The embodiment shown in FIG. 6 is a different type of gate in which the valve body IB does not have a rotating handle. It is a valve. Instead, the valve has a rotary valve stem 75 with an upper part of the valve stem 75. An extension part 79 is fitted to the top of the extension part 79, and the top part of the extension part 79 has a pair of flat surfaces facing each other. 77. Apply a spanner or key to the pair of flat surfaces 77 facing each other. The stem is then rotated to open and close the valve. In this example, the valve Stem 75 and extension 79 are made of mild steel. Brass with external thread Fit the sleeve 81 onto the lowermost end of the extension 79 and pin it with a pin (not shown). do.

The sleeve 81 carries a threaded non-rotating plate 85. Inside this board 85 A boss 87 is provided at the center, a female thread is formed on this boss 87, and the male thread of the sleeve 81 is connected to the male thread of the sleeve 81. Make sure they are screwed together. Plate 85 is attached to clamp rods 89 (only two shown in the drawing). These clamp rods 89 are inserted through appropriate openings 91 in the plate 85. do. The clamp rod 89 is provided with a thread, and a pair of nuts 95 are used to secure the valve body IB. Clamp to the upper part 93 of the top of the. Circumferentially at the top of the upper part 93 of the valve body 113 Four lamp rods 89 are arranged in this direction.

As extension 79 rotates, valve stem 75 also rotates, simultaneously causing the sleeve of extension 79 to rotate. 81 also rotates. Since the plate 85 is screwed onto the sleeve 81, the plate 85 is attached to the extension portion 7. 9 along the threaded sleeve 81. move up and down.

One side of plate I carries a brass rod 97. This brass rod 97 is It is held to plate 85 by a pair of nuts 99 threaded onto brass rods. this truth A hole 101 is bored in the stud rod 97 so as to intersect with the longitudinal axis. supports a ferromagnetic material 103. Preferably, the magnetic material is a permanent magnet. - It can also be made of other materials as mentioned.

The sensor 11 is arranged in conjunction with this magnetic material 103, so that the sensor 11 1 is supported on a plate 105, and this plate 105 is connected to a clamp rod 89 by a nut 107. to hold. Brass rods 97 are inserted into suitable openings (not shown) in this plate 105. ). Accordingly, by rotating the valve stem 75, the plate 85 is attached to the upper portion of the sleeve 81. When 83 is moved downward by 2", the brass rod 97 also moves up and down, and the magnetic material 10 3 from the sensor 11. This causes the switch contacts inside Sensor II to operate. , an alarm can be generated when the valve gate is moving to the closed position. sensor 11 can be of the same type as shown in the embodiments described above.

An annular plate 109 is supported on the clamp rod 89, and this original plate 109 is held by a lock nut. 110. The annular plate 109 is located above the top of the extension 79 and the sensor 11 and also connects to the upper portion 83 of the extension for operating the valve. Keep it in a position where you can get close to it.

A plate 111 is stretched between two clamp rods 89. This board 111 is Rocknuts It is held on one clamp rod 89 by the clamp rod 110, and the clamp rod 89 A padlock (not shown) inserted into the opening 112 formed in the is held by the other clamp rod 89. All nuts are pins (not shown) ) and align sensor 11 with respect to rod 97 and magnetic material 103. Make it easy to change columns.

In figures 7 and 8 different types of sensors 11 are shown.

In this embodiment, the sensor 11 consists of two parts made of cast iron; Completely surround the valve stem 5 or other parts of the valve integrally connected to the gate be interconnected so that In this embodiment, the electrical switch is connected to the T-shaped portion 113. Store it in. This T-shaped portion 113 is linked to the shield portion 115. do. In this case, the stem portion 117 of the T-shaped portion is placed within the U-shaped notch 119. Ru. Parts 113, 115 are made of materials other than cast iron, such as brass or plastic. It is preferable to choose a ferromagnetic material such as cast iron. Yes. That is, it suppresses the magnetic field coming near the outer surface of portion 113.07 and thus It is possible to effectively shield the area around the reed switch 121 installed in the This is because it is possible. Therefore, the reed switch 121 operates without generating an alarm signal. The contacts of reed switch 121 are held open by the person attempting to close the valve. Therefore, it may not be affected by an external magnetic field brought close to the sensor 11. do not have. parts 113.115 by other materials such as plastic or brass. When formed, the physical dimensions of portions 11.3.115 are those portions 113.11 The distance from the outer surface of the reed switch 121 is such that the magnetic field of any external magnet is It should be relatively weak.

Reed switch 121 is mounted within stem portion 117 of section 113 as described above. . The head 123 of the portion 113 is provided with a hollow recess 125 from which the screw 12 is inserted. 7 is inserted into the arm 129 of the part 115, and the parts 1, 13, and 115 are connected to each other. Screw it on. Provide four screws, one at each corner of the hollow recess 125. Good. A semicircular concave surface 131 is provided at the lowermost end of the stem portion 117 (seventh and (See Figure 8). When combining part 113 with part 115, the outer diameter of valve stem 5 This creates a circular aperture of slightly larger diameter. The valve stem 5 therefore rotates within this opening. It can move up and down and move the magnetic material 13.103 to release the reed switch. It is possible to approach or move away from the vicinity of the bridge 121.

A resin filling part 113 is provided at the front end of the IJ-do switch 121, and a hollow recess 1 is provided. 25 is also provided with a resin filling portion 133. In the resin filling part 133 in the hollow recess 125 Cover the head of the twisting screw 127 so that it is not visible, and attach the part 113 to the part 5. Remove from and tighten. Furthermore, as shown in FIG. 1 and penetrates into the stem portion 117 from the art portion 129. . Bin 135 is therefore provided with an additional rod to prevent parts 113, 115 from coming apart from each other. This is a means of checking. The pin 135 is inserted through a longitudinal slot 137 formed in the side edge of the section. These slots 137 hold the head or nut of the set screw or hole 39. These setscrews or bolts 139 are used to attach the bracket 141 to the sensor. 11, so that this sensor 11 can be installed in the proper operating position of the valve. Used to make. The top of the bottle 135 is located inside the innermost surface of the slot 137. In order to prevent the head or nut from sliding in the slot 137 of the set screw or bolt, There will be no interference.

The hollow recess 125 is closed by a lid 143, which is secured by screws 145. Screw at minute 113. Install the microswitch 147 inside the hollow recess 125 This microswitch 147 completely covers the hollow recess 125 with the lid 143. When closed, the movable arm of the microswitch engages the lid 143 and is pushed in by the lid. make sure that it is included. This microswitch issues an alarm when the lid 143 is removed. Take necessary safety measures. Additionally, other proximity switches in the form of reed switch 149 Installed in a hollow recess and generates an alarm signal when a magnetic field comes near the sensor 11 Try to cheat. This happens when a person brings a magnet close to sensor 11 and closes the valve gate. intentionally by attempting to hold the contacts of the reed switch 121 open. This can be seen when attempting to disable the sensor 11.

Each of the switches 121, 147, 149 brings out three leads. These resources The lead wires are connected to the common negative wire, the normally open lead wire, and each contact in these switches. Connect normally closed contacts. All contacts of these three switches are connected in parallel. , to generate an alarm signal when any of the switches is activated. Must Depending on the required circuit topology, switches may be connected in series or in a combination of series and parallel. It is possible to make a parallel connection.

In the embodiment shown in Figures 7 and 8, when the valve gate closes the reed switch In order to "disable" 121, i.e. keep the contacts open, a person must It becomes extremely difficult to place a ferromagnetic material between the concave surface 131 of the portion 117 .

As can be seen from FIG. 9, the ordinary sprinkler extinguishing alarm control circuit 150 is 51 or other suitable display means. Bell 151 is the location where the fire alarm system is installed. station and/or at a fire brigade station. Various sensors 11 The switch contacts are connected in parallel as shown and closed to generate an electrical alarm signal. The model shall be An electric signal is generated when the contact of the sensor 11 is opened. It is also possible to configure the circuit to generate . In this alternative embodiment sensor 1 Contact 1 closes when the valve is fully opened and opens when the valve gate moves to the closed position. I will do it.

The invention may be modified in many ways without departing from the scope of the claims. example For example, the sensor does not have to be a reed switch, but can be any magnetic switch. Can be done.

Furthermore, according to the present invention, the switch itself can be placed inside the valve member or can be placed underwater. can. In this case, conventional technology equipped with sensing means for sensing the closed state (iii) It has significant advantages over surgical valves.

These and other modifications are also within the scope of the invention provided they are defined by the above description. It does not deviate from.

[Sigma & Ii inspection report Parade Moan-Portrait 1^-”-’-”’ PCT/AU 85100156

Claims (16)

[Claims] 1. A type of fire extinguisher water valve that is normally capable of releasing water in the event of a fire. In the method of sensing when the valve is closed, a magnetically actuated sensor is placed on the outside of the valve member. In relation to the water supply valve, the vicinity of a magnetic part that moves due to the opening and closing of the valve gate of the water supply valve. so that it senses that the valve gate is closed and triggers an alarm device. A valve closure sensing method characterized by comprising the magnetically actuated sensor. . 2. placing a ferromagnetic material on the moving part of the valve that moves as the valve gate moves; When the valve gate moves to the closed position, the sensor operates and triggers the alarm device. Claim 1, wherein the sensor is held in a housing of the valve. Valve closure sensing method described in . 3. Claims characterized in that a ferromagnetic magnetic material is arranged in the movable part of the valve. The valve closure sensing method according to item 2. 4. Claim 2, characterized in that a permanent magnet is arranged in the movable part of the valve. Valve closure sensing method described in . 5. In the case of a fire, the water supply valve of the fire extinguishing system, which supplies water from the water supply valve, is Magnetically detects the closed state of the gate of the valve and activates an alarm in such a state. A sensor used to generate an output signal to operate the valve member is provided externally to the valve member. connect the sensor to the fire apparatus and in response to said output signal when the gate is closed. A water supply valve characterized by being configured to provide an alarm display. 6. The sensor is fixedly held against the casing of the water supply valve, and a ferromagnetic material is attached to the valve. movable with the movement of the gate, and when the gate moves to the closed position, the A ferromagnetic material actuates the sensor to switch and generate the output signal. The water supply valve according to claim 5, characterized in that the water supply valve has the following configuration. 7. The sensor is a reed switch that generates the alarm activation signal. The water supply valve according to claim 6, characterized in that: 8. The sensor is configured to block a magnetic field external to the sensor that generates the alarm activation signal. Claims characterized in that the housing is constructed of a material that can be cut. The water supply valve according to any one of items 5 to 7. 9. Claim 8, wherein the housing is made of cast iron. Water valve as described. 10. The sensor is formed in a shape to be mounted around the rod-shaped portion of the valve, and The rod-shaped portion is movable along with the movement of the valve gate, and is made of magnetically sensitive material. the magnetically responsive part that generates the alarm activation signal. placing a foreign object to disable said sensor, even when said valve gate is in a closed position; Equipped with a sensor whose shape cannot prevent the generation of the above-mentioned alarm signal. The water supply valve according to any one of claims 5 to 9, characterized in that: 11. The rod-shaped portion is completely surrounded by the housing. The water supply valve according to claim 10. 12. Claim 11, wherein the rod-shaped portion is a valve stem. The water supply valve described in . 13. Claim 1, characterized in that the magnetically sensitive material is a permanent magnet. Water supply valve described in Section 7. 14. Claim 7, wherein the magnetically sensitive material is mild steel. or the water supply valve described in any one of Clauses 8 to 12 subordinate to this Clause 7. . 15. A magnetic actuation sensor is attached to the outside of the valve member of the water supply gate valve. Detects that the gate is closed and generates an alarm display when the valve gate is closed. A fire extinguishing device characterized by: 16. The water supply gate valve is according to any one of claims 5 to 14 above. 16. The fire extinguishing system according to claim 15, characterized in that it is the water supply valve according to claim 15.