JP2002132352A - Governor with cassette type valve part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a governor with a cassette type valve part for which maintenance work can be done in a shortened time and which eliminates the need to secure a maintenance space by employing a cartridge system such that the whole valve part is replaced. SOLUTION: The governor consists of a body 2, a top cover 3 fixed detachably to the upper part of the body 2, a diaphragm mechanism 4 provided detachably on the top cover 3 and a valve part 8 which is incorporated into the top cover 3 from the body 2 and controls communication quantity between the primary passage and the secondary passage of a body 2 by a valve element 7 by coupling a spindle shaft 5 with a diaphragm 6 of the diaphragm mechanism 4. The valve part 8 holds the spindle shaft 5 vertically penetrating an inner case 18 provided with a sheet ring 23 at the lower part, and the valve element 7 which opens and closes the sheet ring 23 is provided at the lower end of the spindle shaft 5. A balance diaphragm 24 which is connected to the spindle shaft 5 is incorporated in the inner case 18, and thus the valve part 8 is formed into a cassette type, and the inner case 18 of the valve part 8 can be fixed so that it can freely be inserted into and extracted from the top cover 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve cassette type governor which is incorporated in a supply line of a fluid such as a gas and used to regulate a secondary pressure of the fluid at a constant level.

[0002]

2. Description of the Related Art For example, in the middle of a gas supply line, fluctuations in the secondary pressure are used to stabilize the secondary pressure.
2. Description of the Related Art A governor for controlling a communication amount between a primary side passage and a secondary side passage is installed.

[0003] The conventional governor is roughly divided into a body incorporated in the middle of a gas supply line, a top cover fixed to the upper part of the body, and a diaphragm mechanism fixed to the top cover. The upper end of the spindle shaft that penetrates the cover up and down is connected to the diaphragm of the diaphragm mechanism, and a valve body is provided at the lower end of the spindle shaft to open and close a seat ring that separates the primary and secondary sides of the body. It has a structure in which a balance diaphragm for applying a pressure on the primary side is formed in the top cover and connected to the spindle shaft.

In such a governor, for example, in the case of a direct acting type, the diaphragm of the diaphragm mechanism is pressed down by a pressure adjusting spring to urge the elasticity, and at the same time, the secondary pressure is supplied to the lower chamber, and the secondary pressure is supplied to the lower chamber. When the pressure rises, the valve closes the seat ring to shut off the primary and secondary sides, and when the pressure on the secondary side drops, the valve opens the seat ring and supplies the primary fluid to the secondary. By doing so, the secondary pressure is increased.

[0005] Incidentally, in the governor as described above, it is necessary to periodically perform maintenance for inspecting a valve portion and replacing a deteriorated part at an installation site.

However, since the conventional governor has a structure in which the spindle is directly held by the top cover, the spindle cannot be pulled out from the top cover. To perform maintenance for replacement, remove the top cover from the body, remove the valve body and seat ring from the inside of the body, check the valve section, and replace the deteriorated parts with the valve section and diaphragm mechanism. This is done by disassembling.

[0007]

The removal of the top cover from the body, the disassembly of the components, and the replacement of the deteriorated components take a lot of trouble and a long time, and require a maintenance space for placing the disassembled components. There is a problem of needing.

Accordingly, an object of the present invention is to provide a cartridge system in which the valve portion is made into a cassette so that it can be freely inserted into and removed from the top cover, and the entire valve portion can be replaced without replacing the deteriorated parts without removing the top cover. Accordingly, it is an object of the present invention to provide a valve cassette type governor that can significantly reduce the time required for maintenance work and that does not need to secure a maintenance space.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a body, a top cover detachably fixed to an upper portion thereof, and a diaphragm mechanism detachably provided on the top cover. And a valve unit that is incorporated into the top cover from the body and controls the amount of communication between the primary side passage and the secondary side passage by the valve body by connecting the spindle shaft to the diaphragm of the diaphragm mechanism. The above-mentioned valve portion is provided with an inner case provided with a seat ring at a lower portion, holding a spindle shaft penetrating vertically, a valve body for opening and closing the seat ring at a lower end of the spindle shaft, and connected to the spindle shaft in the inner case. The balance diaphragm is installed and made into a cassette, and the inner case of the above valve section is fixed to the top cover so that it can be freely inserted and removed from the top It is obtained by adopting a configuration in which wear way.

[0010] Here, the diaphragm mechanism is provided with a lower case integrally provided on the upper part of the top cover, and an upper case detachably fixed with the diaphragm interposed on the lower case, and the upper case is removed from the lower case. Thus, the valve unit can be pulled out without removing the top cover from the body.

The diaphragm mechanism is controlled by a direct-acting type by selecting a control fluid at openings provided in the lower case and the upper case, and selecting a direction of elasticity applied to the diaphragm of the pressure adjusting spring. And the pilot type can be selected.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

A valve cassette type governor 1 according to a first embodiment shown in FIGS. 1 to 4 is a direct-acting, pilot-type unloading type, and includes a body 2 incorporated in a fluid line, A top cover 3 removably fixed to the upper part, a diaphragm mechanism 4 removably provided on the top cover 3, and a spindle 6 built into the top cover 3 from the body 2 and connecting the spindle shaft 5 to a diaphragm 6 of the diaphragm mechanism 4. And the valve element 7
And a valve portion 8 for controlling the amount of communication between the primary side passage and the secondary side passage of the body 2.

The body 2 includes a partition wall 9 provided therein.
The fluid passage is partitioned into a primary side 10 and a secondary side 11 by a fitting hole 12 in which a seat ring of a valve portion 8 described later is fitted in a partition wall 9, and an insertion hole 13 of the valve portion 8 is provided at an upper portion thereof. An opening is formed coaxially with the fitting hole 12 so as to communicate with the side 10, and a fixing flange 14 of the top cover 3 is provided therearound.

The top cover 3 has a cylindrical shape having the same inner diameter as the insertion hole 13. A flange 16 for fixing with a bolt and a nut 15 to a fixing flange 14 is provided around the outer periphery of a lower end portion. Lower case 1 of diaphragm mechanism 4
7 are integrally formed.

As shown in FIG. 1 (B), the valve part is an inner case 1 which is fitted in the top cover 3 so as to be freely inserted and removed.
8, a flange 21 is provided in the upper surface concave portion 19 of the top cover 3 to be fixed to the top cover 3 with bolts 20, and a plurality of support pieces 22 are provided at a lower portion of the inner case 18 through the plurality of support pieces 22. A seat ring 23 is fitted in the fitting hole 12 in an airtight manner, and the spindle case 5 penetrating the inner case 18 so as to be movable up and down along the axis in the inner case 18 is held by the inner case 18. A valve body 7 for opening and closing the seat ring 23 on the lower surface side is provided at the lower end of the shaft 5, and a balance diaphragm 24 connected to the spindle shaft 5 in the inner case 18.
Is built into a cassette.

The seat ring 23 and the valve element 7 in the valve portion 8 have a smaller diameter than the inner diameter of the top cover 3 so that the valve portion 8 can be inserted into and removed from the top cover 3 from above. The diaphragm 24 is provided with a piston 26 fixed to the spindle shaft 5 and a diaphragm 27 fixed to the piston 26 by dividing the hollow chamber 25 into upper and lower rooms in a hollow chamber 25 provided inside the inner case 18. The distal end of the conduit 28 connected to the lower room is formed so as to face the inside of the seat ring 23, and the fluid pressure of the primary side 10 acts on the lower room.

In the upper chamber, a fluid pressure on the secondary side 11 is applied by a passage 5a provided below the spindle shaft 5.

The spindle shaft 5 has a structure in which a plurality of upper and lower parts are sequentially connected.

The diaphragm mechanism 4 comprises a lower case 17 integrally connected to the periphery of the upper end of the top cover 3 and an upper case detachably fixed on the lower case 17 with bolts and nuts 29 with the diaphragm 6 interposed therebetween. 30, a spring case 31 provided on an upper part of the upper case 30, an indicator 32 provided on the spring case 31, a spring holder 33 fixed in the spring case 31 and an upper plate 34 of the diaphragm 6. 6
And a spring 35 contracted so as to always push down the upper end of the spindle shaft 5 of the valve portion 8.
The spring 35 constantly urges the valve element 7 through the diaphragm 6 in the valve opening direction.

The lower case 17 of the diaphragm mechanism 4 has an opening 37 for supplying the secondary pressure of the fluid or the fluid pressure from the pilot to the lower chamber 36 of the diaphragm 6, and the upper case 30 An atmospheric pressure equalizing opening 39 for making the upper chamber 38 atmospheric pressure is provided.

FIG. 4 shows a use state of the valve cassette type governor 1. The primary side pipe 42 enters the inlet side of the body 2 via the valve 41, and the secondary side via the outlet valve 43 to the same side. The intermediate pressure ball valve 46 and the intermediate pressure auxiliary valve 47 are provided on the primary side, and the low pressure ball valve 48 is provided on the secondary side in the middle of the adjusting pipe 45 connecting the pipes 44 and connecting the primary side pipes 42 and the secondary side pipes 44. And a low-pressure auxiliary valve 49 are provided, and a throttle valve 50 is provided between the intermediate-pressure auxiliary valve 47 and the low-pressure auxiliary valve 49. An opening of the diaphragm mechanism 4 is provided between the throttle valve 50 and the low-pressure auxiliary valve 49 of the adjusting pipe 45. 37.

When the secondary pressure is low, the valve element 7 is in the valve-open position, and fluid flows from the primary pipe 42 to the secondary pipe 44. When the secondary pressure increases, the lower chamber 36 of the diaphragm mechanism 4 is opened. Pressure rises and the diaphragm 6 causes the spindle shaft 5
Is raised, the valve element 7 rises, and the opening degree of the seat ring 23 is reduced to suppress the outflow of the primary fluid to the secondary pipe 44, and to adjust the fluid pressure of the secondary pipe 44,
When the secondary pressure increases and reaches the set pressure, the valve element 7 closes the seat ring 23.

In order to check the valve portion 8 in the maintenance of the valve portion cassette type governor 1, the top cover 3 is removed from the body 2 as shown in FIG. The portion protruding from the lower end of 3 may be extracted from the body 2 and inspection and cleaning of this portion may be performed. When the inspection is completed, the top cover 3 may be fixed to the body 2 by performing the operation reverse to the removal.

In order to replace the valve portion 8 during maintenance, as shown in FIG. 3, the upper case 30 of the diaphragm mechanism 4 is removed from the lower case 17, and the connection between the spindle shaft 5 and the diaphragm 6 is released. ,
The diaphragm 6 is also removed, and the top cover 3 is
After removing the valve portion 8 from the inside and inserting a new valve portion 8 into the top cover 3, the diaphragm mechanism 4 may be assembled in a reverse operation to the removal, and the valve portion 8 can be replaced by a cassette method. Therefore, there is no need to remove the top cover 3 or disassemble the valve portion 8, and the replacement operation can be performed easily and in a short time.

FIGS. 5 to 7 show a second embodiment of a valve cassette type governor. Note that the first
The same parts as those in the above embodiment are denoted by the same reference numerals, and the description will be omitted. The same applies to the following embodiments.

The valve cassette type governor 1 of the second embodiment is an example of a pilot loading type, and a spring retainer 33 in the diaphragm mechanism 4 is used.
Is fixed to the upper end of the spindle shaft 5, and a spring 35 is contracted between the upper case 30 and the spring retainer 33 to urge the diaphragm 6 and the valve element 7 with constantly rising elasticity, so that the lower case 17 and the upper case Opening 3 provided in case 30
7 and 39 are respectively connected to a pilot.

This valve cassette type governor 1 controls the opening degree of the seat ring 23 by the valve element 7 by the pressure difference between the upper chamber 38 and the lower chamber 36 in the diaphragm mechanism 4 caused by the fluctuation of the secondary pressure. 6 and FIG. 7 correspond to FIG. 2 of the first embodiment, and FIG. 7 corresponds to FIG. 3 of the first embodiment. It can be performed in the same manner as in the embodiment.

A valve cassette type governor 1 according to a third embodiment shown in FIG. 8 is an example of a direct-acting, pilot-type unloading type and an angle type body.
Of the first embodiment, except that the secondary side 11 is branched in two directions at right angles and any of the secondary side openings can be closed by the cover plate 51 in accordance with the conditions of use. The same structure is used, and maintenance can be performed in the same manner as in the first embodiment.

The valve cassette type governor 1 of the fourth embodiment shown in FIG. 9 is an example of a pilot type loading type and an angle type body. The secondary side of the body 2 is branched in two right angles. According to the conditions of use, except that any of the secondary openings can be closed by the lid plate 51, the structure is the same as that of the second embodiment, and the maintenance is This can be performed in the same manner as in the first embodiment.

[0031]

As described above, according to the present invention, the valve shaft of the governor is vertically held by the inner case provided with the seat ring at the bottom, and the seat ring is opened and closed at the lower end of the spindle shaft. A valve body is provided, and the balance diaphragm connected to the spindle shaft is incorporated into the inner case to form a cassette.The inner case of the valve section can be fixed to the top cover so that it can be freely inserted and removed from the top. Inspection of the part can be performed by removing the top cover from the body, and replacement of the valve part can be performed by removing the valve part from the top cover by removing the upper case of the diaphragm mechanism, and removing the top cover from the body It is not necessary to replace the entire valve section with a cartridge system. Shortening of the significant time of maintenance work it is possible to realize, moreover, is not necessary also ensure the maintenance space.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional front view showing a closed state of a valve cassette type governor according to a first embodiment, and FIG. 1B is a longitudinal sectional front view of a valve unit.

FIG. 2 is a longitudinal sectional front view showing a state where a top cover is removed from a body of a valve cassette type governor according to the first embodiment.

FIG. 3 is a longitudinal sectional front view showing a state in which a valve portion is removed from the valve cassette type governor according to the first embodiment.

FIG. 4 is an explanatory diagram showing a use state of the valve cassette type governor according to the first embodiment.

FIG. 5A is a vertical sectional front view showing a closed state of a valve cassette type governor according to a second embodiment, and FIG. 5B is a vertical sectional front view of a valve section.

FIG. 6 is a longitudinal sectional front view showing a state where a top cover is removed from a body of a valve cassette type governor according to the second embodiment.

FIG. 7 is a longitudinal sectional front view showing a state in which a valve portion is removed from a valve portion cassette type governor according to the second embodiment.

FIG. 8 is a longitudinal sectional front view showing a valve closed state of a valve cassette type governor according to a third embodiment.

FIG. 9 is a longitudinal sectional front view showing a valve closed state of a valve cassette type governor according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve-type cassette type governor 2 Body 3 Top cover 4 Diaphragm mechanism 5 Spindle shaft 6 Diaphragm 7 Valve 8 Valve part 9 Partition wall 10 Primary side 11 Secondary side 12 Fitting hole 13 Insertion hole 14 Fixing flange 15 Bolt, nut 16 Flange 17 Lower Case 18 Inner Case 19 Concave 20 Bolt 21 Flange 22 Supporting Piece 23 Seat Ring 24 Balance Diaphragm 25 Hollow Room 26 Piston 27 Diaphragm 28 Pipe 29 Bolt, Nut 30 Upper Case 31 Spring Case 32 Indicator 33 Spring Holder 34 Upper Plate 35 Spring 36 Lower chamber 37 Opening 38 Upper chamber 39 Atmospheric pressure equalizing opening 41 Inlet valve 42 Primary pipe 43 Outlet valve 44 Secondary pipe 45 Adjustment pipe 46 Medium pressure ball valve 47 Medium pressure Auxiliary valve 48 Low pressure ball valve 49 Low pressure auxiliary valve 50 Throttle valve 51 Cover plate

Continuation of front page (72) Inventor Hiroshi Maruyama 2-3-11, Noribori, Nishi-ku, Osaka-shi, Osaka F-term (reference) 3H051 AA01 BB03 CC11 FF01 3H056 AA02 BB24 BB33 BB50 CA07 CB03 CC01 CD06 DD01 DD02 DD04 EE06 GG03 5H316 AA11 BB05 DD13 DD15 DD20 EE02 EE10 EE12 HH04 HH15 JJ01 JJ13 KK02

Claims (3)

[Claims] 1. A body, a top cover removably fixed to an upper portion thereof, a diaphragm mechanism removably provided on the top cover, and a spindle shaft incorporated into the top cover from the body to connect a spindle shaft to the diaphragm mechanism. Combined with the diaphragm, the valve body controls the amount of communication between the primary side passage and the secondary side passage of the body, and the valve part is vertically moved by an inner case with a seat ring provided at the bottom. Hold the spindle shaft that penetrates,
A valve body that opens and closes the seat ring is provided at the lower end of the spindle shaft, and a balance diaphragm connected to the spindle shaft is incorporated into the inner case to form a cassette, and the inner case of the valve section can be fixed to the top cover so that it can be freely inserted and removed from the top. Valve type cassette type governor. 2. The diaphragm mechanism includes a lower case integrally provided on an upper part of a top cover, and an upper case detachably fixed with a diaphragm on the lower case, and the upper case is removed from the lower case. The valve unit cassette type governor according to claim 1, wherein the valve unit can be removed without removing the top cover from the body. 3. A control system according to claim 1, wherein said diaphragm mechanism has a direct control system by selecting a control fluid at an opening provided in each of a lower case and an upper case and selecting a direction of elasticity applied to a diaphragm of a pressure adjusting spring. 3. The valve cassette type governor according to claim 1, wherein a type and a pilot type can be selected.