JPS59212583A - Bottom valve control device of tank lorry - Google Patents

Abstract

PURPOSE:To enable to perform unloading operation through opening of a bottom valve by means of a manual opening and closing device in case a trouble on a fluid-operated device occurs, by a method wherein a fluid-operated device for opening the valve body of the bottom valve and a manually-operated device are provided together. CONSTITUTION:When an emergency control valve can not be controlled due to the occurrence of fire in the vicinity of the emergency control valve, a soluble piece 87 of an emergency automatic valve 23 is fused. The air in a cylinder part 39 of a bottom valve 13 is exhausted to the open air through the emergency automatic valve 23 to close the bottom valve 13. When an air tank is short of a pressure or the bottom valve 13 can be opened due to a trouble on an air circuit and an electric circuit, a screw lever 49 is raised through rotation of the screw lever 49 by means of a handle 55, and a valve body 31 is forcibly pushed upward through a valve rod 33 to open the bottom valve 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bottom valve operating device for a tank lorry, which is equipped with a fluid actuator for opening a valve body against a bomb.

Conventionally, in a bottom valve operation device for a tank lorry equipped with a fluid operating device that opens and closes the bottom valve of a tank lorry using fluid such as air pressure, the valve body of the bottom valve is closed by a bullet, and the fluid operating device closes the bottom valve of the bottom valve. However, when air pressure is used, for example, the air pressure is usually extracted from an air tank for the air brake of a tank lorry vehicle. If the air pressure in this factory tank is low for some reason, or if the bottom valve cannot be opened due to a malfunction in the air piping system, it is not possible to unload the loaded liquid in the tank chamber. This poses a serious problem in that it may not be possible to repair the malfunctioning part, so there has always been concern about the use of fluid-operated bottom valves.

The present invention provides a fluid operating device that releases the valve body of the bottom valve and a manual operating device, so that the bottom valve can be opened by the manual opening/closing device that can operate reliably in the event of a failure of the fluid operating device. It is an object of the present invention to provide a bottom valve operating device for a tank truck, which allows unloading and easy-to-operate fluid operating devices without anxiety.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 8, reference numeral 1 indicates a tank lorry, and a tank 5 for storing liquid is mounted on a chassis 3, and the tank 5 is separated by partition plates 7, 7 into tank chambers 9, 9, and 9.
It is divided into 9 parts. 11 is an injection port provided at the top of each tank chamber 9; 13 is a bottom valve provided at the bottom of each tank chamber 9;
5 is a pipe connecting each bottom valve 13 and the discharge valve 17.

19 is an electromagnetic on-off valve S for controlling the opening operation of the bottom valve 13;

S- is an operation switch provided at the top and bottom of the tank 5, respectively, to open and close the electromagnetic on-off valve 19, and the switch support is fixed to the plate 20. 21 is an emergency operation valve, 2
3 is an automatic emergency valve, 25 is an air tank, and 27 is a ladder.

FIG. 2 shows the bottom valve 13, which is constructed as follows. That is, the valve body 29 is fixed to the bottom of the tank 5 and communicates with the piping 15. 31 is a valve body that is fixed to a valve rod 33 that fits into two valve bodies so as to be able to move up and down;
valve seat 35 is opened and closed. Reference numeral 36 denotes a fluid operating device, which is constructed as follows. That is, 37 is a piston fixed to the lower end of the valve stem 33, and is fitted into a cylinder part 39 provided at the lower part of the valve body 29 so as to be able to swing freely. 41 is an air pipe communicating with the chamber 43 below the piston 37, and 45 is a bomb that biases the valve body 31 in the direction of closing. 47
is a manually actuated device and is configured as follows. That is, 49 has screws 51, 51 at the lower end of the cylinder part 39.
The handle 5 is screwed into the bottom N53 fixed by
It is raised and lowered by turning and moving by the valve 5, and the upper end contacts the lower end of the valve rod 33 to raise the valve body 31.

Reference numeral 57 denotes an oil seal fitted to the outer periphery of the screw rod 49', which maintains airtightness around the screw rod 49 when the screw rod 49 is lowered.

FIG. 3 shows the electromagnetic on-off valve 19, which is constructed as follows. That is, 59 is a spool that is swingably fitted into the valve body 61, 63 is a spring that biases the spool 59 in the right direction in FIG. It is moved to the left in FIG. 3 against the ammunition 63. Solenoid S
Since QL has the same structure and function as those commonly used, detailed explanation will be omitted here.

The spool 59 has moved to the right as shown in Figure 3 a.
When in position b, the pipe 41 leading to the bottom valve 13 communicates with a communication hole 65 that opens to the atmosphere, and when in position b, which is moved to the left, the pipe 41 communicates with a pipe 67 communicating with the emergency operation valve 21. It is something that communicates.

FIG. 4 shows the emergency operation valve 21, which is constructed as follows. That is, 6 is a spool provided swingably within the valve body 71, 73 is a spring that biases the spool 69 in the right direction in FIG. 4, and 75 is an emergency lever. As shown in FIG. 4, when the spool 69 is moved to the right position a, the piping 67 communicating with the electromagnetic on-off valve 19 and the piping 79 communicating with the compressor 77 are communicated with each other.

Furthermore, when the spool 69 is at position b, which is moved to the left in FIG.
communicate with.

FIG. 5 shows the automatic emergency valve 23, which is provided branching off from the piping 67 and is constructed as follows. That is, 83 is a valve body fixed to a pipe 85 branching from the pipe 67, and 87 is a fusible piece held by m89 in the valve body 83, which melts when heated to a predetermined temperature and connects the pipe 85 to the atmosphere. It is something.

FIG. 7 shows the air circuit, and FIG. 8 shows the electric circuit. The solenoid 5QL- of the electromagnetic on-off valve 19 is the first solenoid. Second.
5 according to the order of arrangement of the third tank chamber 19.19.19
QL-1, 5QL-2, and 5QL-3. Similarly, the operation switches S and S- are operated in the order of tank chamber 19.
1, S-2, 8-3 and 5--1. S'-2, S'-
3, and are roughly divided into a push button type for current connection and a push button type for current disconnection, and are distinguished by giving the symbols a and b, respectively. That is, 5a-1, 5a-2, Sa-3 are operation switches for connection at the top of the tank, 5b-1, 5b-2,
Sb-3 is the disconnection operation switch on the top of the tank, 5=a
-1, 8-a-2, 3-a -3 is the operation switch for connecting the current at the bottom of the tank 1.5-b-1, S'b-2, 8=
b-3 indicates an operation switch for cutting off the current provided at the bottom of the tank. Furthermore, r-1, r-2, r'-
3 and r--1', r--2, and r--3 are contacts of relays R-1, R-2, and R-3, respectively, and 91 is a battery.

In addition, the compressor 77 and the air tank 25 are mounted on the chassis.
It also serves as the one used for the air brake in No. 3.

In the above embodiment, for example, to open the bottom valve 13 of the first tank chamber 9, press the operation switch Sa-1 or S''a-1 at the top or bottom of the tank chamber 5 to connect the circuit. Relay R-1 is energized, contact r'-1 connects and holds itself, and contact r-1
is connected, the solenoid 5QL-1 is energized, and the electromagnetic on-off valve 19 is switched from the a position to the b position. Therefore, the pressurized air generated by the compressor 77 and sent through the air tank 25 and the emergency operation valve 21 is sent to the three cylinder parts of the bottom valve 13, and the piston 37 resists the bomb 45.
is pushed up, the valve body 31 separates from the valve seat 35, and the bottom valve 13
is released, and the liquid in the tank chamber 9 is discharged from the pipe 15 to the discharge valve 17.
It is then discharged.

To close the bottom valve 13, press the operation switch 5b-1 or 5-b-1 on the top or bottom of the tank 5 to disconnect the circuit, which cuts off the current in the relay R-1 and closes the contact r-
-1 is disconnected and the self-holding is released, and when contact ``-1'' is disconnected and the current of 5QL-1 is cut off, the electromagnetic on-off valve 19
is returned from the position b to the position a by the bomb 63, and the air in the cylinder part 39 is pushed out by the bomb 45 via the piston 37 and released to the atmosphere from the communication hole 65 of the electromagnetic on-off valve 19, and the air is released into the atmosphere from the bottom. Valve 13 is closed. Similarly, the bottom valves 13 of the second and third tank chambers 9 can be opened and closed.

In addition, in the event of an emergency such as a fire occurring while discharging the liquid by listening to the bottom valve 13, operating the emergency lever 75 in the direction of the arrow in FIG. 4 moves the emergency operation valve 21 from position a to position b. The air in the cylinder part 39 of the bottom valve 13 passes through the electromagnetic on-off valve 19 because it is in position b, and is discharged into the atmosphere from the communication hole 81 of the emergency operation valve 21. Valve 13 is closed. If there is a fire in the vicinity of the emergency operation valve 21 and the emergency operation valve 21 cannot be operated, the fusible piece 87 of the automatic emergency valve 23 will melt and the air in the cylinder part 39 of the bottom valve 13 will become tense. It is discharged to the atmosphere from the valve 23 and the bottom valve 13 is closed.

Due to lack of pressure in the air tank 25 or failure of the air circuit or electric circuit, the fluid operating device 36 may
: When the bottom valve 13 cannot be opened, as the screw 49 is rotated by the handle 55, the screw 49 rises and pushes up the valve body 31 via the valve stem 33, opening the bottom valve 1.
3.

Note that FIG. 9 shows a second embodiment, in which the fluid actuator 36 is provided above the valve body 31, and the piston 3
A valve rod 33 connecting the valve body 7 and the valve body 31 penetrates through the valve body 31 and projects downward. The manual actuation device 47 is constructed as follows. That is, an arm 93 is pivotally connected to the valve body 29 by a shaft 95, and is in contact with the lower end of the valve stem 33.

Reference numeral 97 is a connecting rod that connects one end to the operating lever 99 and the other end to an arm 101 fixed to the shaft 95. By operating the operating lever 99 in the direction of arrow B, the valve body 31
can be raised to open the bottom valve 13. 103 is a balance hole that passes through the valve stem 33;
The pressure applied to the lower surface of the piston 37 and the upper surface of the piston 37 are balanced.

Incidentally, in FIG. 9 and FIGS. 10 and 11 which will be described later, the same reference numerals as those shown in FIGS. 1 to 8 represent the same components. FIG. 10 shows a third embodiment,
The fluid actuation device 36 and the manual actuation device 47 are each connected to the elongated hole 1.
05 and 107 in parallel to the arm 101. Also, above the valve body is a balance cylinder 10.
9 is provided, and a balance piston 111 is fitted therein so as to be able to swing freely. In FIG. 11, the fluid actuator 3G of FIG. 10 is installed in a manual actuator 47 (in series).

Since the present invention has the configuration as described in the claims,
In the event of a failure of the fluid operating device, the bottom valve can be reliably opened to unload cargo, and therefore the easy-to-operate fluid operating device can be used without anxiety. In addition,
In the present invention, "co-located" means "co-located together".
It is not limited to providing them in parallel. Furthermore, manual operation means operation by manual operation without fluid operation, and does not include operation in which a fluid-operated device is operated by manually operating an operating valve.

Further, in the above-described embodiments, the fluid operating device is electrically operated by an electric switch, but the fluid operating device may be operated by an operating valve.

Additionally, a manual actuator may be provided to be operated from the top of the tank.

In the embodiments shown in Figs. 1 to 8, the bottom valve is opened by pneumatic pressure, and a two-position electromagnetic on-off valve is used, but hydraulic pressure may be used for the liquid pressure. A three-position electromagnetic on-off valve may also be used, and all of them belong to the present invention.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the reference numerals shown in the claims do not limit the technical scope of the present invention.

, 4. Brief description of the drawings Fig. 1 is a side view of a tank truck equipped with an embodiment of the present invention, Fig. 2 is a side sectional view of an embodiment of the invention, and Fig. 3 is a diagram of an electromagnetic on-off valve. Side sectional view, Figure 4.

Fig. 5 is a side sectional view of the emergency operation valve and emergency automatic valve, respectively, Fig. 6 is a side view of the operation switch, Fig. 7 is a fluid circuit diagram of one embodiment of the present invention, and Fig. 8 is the same electrical 9 is a side sectional view of the second embodiment, FIG. 10 is a side sectional view of the third embodiment, and FIG. 11 is a side sectional view of the main part of the fourth embodiment.

(Explanation of the symbols representing the main parts of the drawings) 31... Valve body 36... Fluid operating device 45... Bomber 47... Manual opening/closing device procedure amendment (voluntary) December 1930 No ! Kazuo Shirawakasugi, Director of the 7th Percentage Authority, 1. Indication of the case: Japanese Patent Application No. 58-40704 2. Title of the invention: Tank truck bottom valve operating device 3. Relationship with the case of the person making the amendment: Patent applicant's address (residence) 3-3-7 Muromachi, Nihonbashi, Chuo-ku, Tokyo Name: Showa Aircraft Industry Co., Ltd. Representative: Tsurube Tsukamoto 4, Agent: IF 105 Address: 1-chome, Toranomon, Minato-ku, Tokyo = /u/Factory sentinel -&x5
1 katsu (Shipping date: Showa, month, day) (1)
Detailed explanation of the invention in the specification (2) Brief explanation of the drawings in the specification (3) Drawing 7, content of amendments (1) In the 10th line of page 43 of the specification, the word "ladder" was replaced with "``Ladder.''

(2) On page 3, line 19, page 4, line 13, page 5, line 8, and page 10, line 13, the words "swivelable" were replaced with "sliding". "Freely," he corrected.

(3) On page 5, line 6, “As shown in 21,” There is a certain thing, “It shows the number 21.” and correct it.

(4) On page 8, line 8, There is air inside 1. There is a certain thing, “The air inside is.” and correct it.

(5) On page 10, line 16 of the same page, the phrase ``It is a thing.'' is replaced with [It is a thing, and 113 is a stopper that locks the operating lever 99. ” he corrected.

(6) In the 11th line of the same 11th line, [J from air pressure There is a certain thing, "By air pressure" and correct it.

(7) On page 11, line 14, "For liquid pressure" There is a certain thing, "For fluid pressure" and correct it.

- (8) In the 10th line of page 12, the phrase "Side sectional view of the embodiment" is amended to read "Side sectional view of the embodiment."

(9) Add Figures 1 and 2 as shown in the attached copy, and correct the location of the red stamp.

(10) Correct Figure 11 as shown in the attached sheet.

8. List of attached layers (1) Amended drawings One or more procedural amendments (voluntary) March 31, 1980 Mr. Aio Wakasugi, Commissioner of the Patent Office 1. Indication of the case Patent Application No. 1983-40704 2. Title of the invention Tank truck bottom valve operating device 3. Relationship to the amended case Patent applicant address (residence) Name (name) 3-3-7 Muromachi, Nihonbashi, Chuo-ku, Tokyo Showa Aircraft Industry Co., Ltd. Representative Tsuka Quantity Department Telephone: Tokyo (504) 3075, 3076, 3077
No. 6, Subject of amendment (1) Detailed description of the invention column in the specification, (2) Drawing 7, Contents of amendment ti) Page 3, line 14 of the specification, page 4, line 13, ``Mating'' should be corrected to ``1'' and ``fitting''.

(2) In the 1st line of page 5 and the 11th line of page 5, the words "a position" should be corrected to "position."

(3) In the 3rd line of the 5th page, the 15th line of page 5, "b position" is corrected to "position."

(4) In the 13th and 14th lines of the 7th Tei, “19 is a
The phrase "from the position" has been corrected to read "19 from position a in Figure 7."

(5) In the 6th and 7th lines of the 8th edition, the phrase ``from position b'' is corrected to ``from position b in Figure 7''.

(6) Drawings Figure 2 has been corrected as marked in red on the attached sheet.

8. List of attached documents (1) Amended drawings One or more procedural amendments Date of May 22, 1981 Kazuo Wakasugi, Commissioner of the Patent Office 1. Matter! Indication 3 of 1, Person making the amendment
No. Toranomon No. 5th floor of the building/Im゛Correct object (1) 1lEkJ 13th March 37th Measurement 'j-1 Out 4-Liquid beggar seal〛correctness and harm 7, pail work/l9 Cane (12th ward surface soup?, 2m long size 41s negative inventory)

Claims (1)

[Claims] The bottom of a tank lorry, characterized in that a fluid operating device 36 for releasing the valve body 31 against a bomb 45 and a manual operating device @ 47 for manually operating the valve body 31 for releasing the valve body 31 are provided. Valve operating device.