JPH0250061A - Plunger-valve removing device - Google Patents

Abstract

PURPOSE:To make virtual removal of a plunger valve as a whole possible from a port having a hose in position in providing a much wider opening therein without allowing the fluid such as refrigerant to leak out by providing a new device connected to the connector of the hose. CONSTITUTION:After fitting a valve port 4 holding a plunger valve 1 therein with a connector at one end of the valve port and fastening them together with a nut 24, a handling shaft 28 is inserted into the valve port 4 to make its forked forward end 28' grip the plunger valve 1 by the catch 10; by turning the handling shaft 28 in the loosening direction the plunger valve 1 as a whole is displaced from the position of its fixation. As a result, a large gap is produced between the plunger valve 1 and the inner wall of the central opening 5 of the port 4. Since this gap is much larger in cross-sectional area than the opening provided by the plunger valve 1 within itself, the resistance which the fluid receives from the plunger valve 1 is reduced and easiness in the flow results as the fluid flows through a connecting end 22, neck 23, passageway 35, and port 34. The connecting work and handling are carried out with the fluid under hermetic seal by using sealing means 38 and the like, hence safely without involving leakage of the fluid.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a service valve installed in a refrigerant compressor for a car air conditioner, for example, except when injecting or discharging fluid such as refrigerant. Used on bug valves (also called bug valves) that close off boats.
Without releasing the fluid into the atmosphere, the entire insect valve is moved under a sealed condition to a position where there is almost no resistance to the flow, facilitating the passage of the fluid and mainly performing the work of discharging the fluid. This relates to an insect pulp remover that is used to remove insect pulp quickly.

[Conventional technology]

For example, a refrigerant such as Freon is used in the refrigerant circuit of a car air conditioner, but when it is necessary to replace the refrigerant, it is sometimes necessary to remove all the refrigerant from the circuit. In such cases, connect the hose of the refrigerant recovery machine to a boat equipped with a so-called insect valve, such as the service valve attached to the compressor in the refrigerant circuit, suck the refrigerant, and collect it in a suitable container. At that time, the small valve opening of the insect valve is opened by connecting the connector (metal fitting) attached to the end of the hose of the collection machine to the port that has the insect valve. position to allow refrigerant to pass through.

[Problem to be solved by the invention]

As mentioned above, when the insect valve is opened using the connector, the insect valve only opens a small internal valve opening, so the refrigerant (fluid for boat fishing) that passes through it is always a large amount. Since the flow rate is not increased due to throttling resistance, there is a problem in that the collection work takes a long time.

Of course, in the case of refrigerant recovery, if the insect valve is pulled out from the port using some kind of tool and then the hose of the recovery machine is connected, the flow resistance will be reduced, but when removing the insect valve, environmental damage such as freon is generated. Such open measures cannot be taken, since the harmful substances that lead to them would be ejected into the atmosphere under their own pressure.

In order to solve this problem, the present invention provides a new mechanism to the hose connector that connects to the port with the insect valve, so that fluids such as refrigerant can be kept in a sealed state without leaking to the outside. It is an object of the invention to provide an insect valve remover which can substantially remove the entire insect valve with a hose connected and open it wide.

[Means to solve the problem]

Although the configuration of the present invention is not specifically limited to the shape and structure, it is expressed using the reference numerals of the illustrated embodiments for convenience, and has a dish-shaped connecting end 22 at the tip and a neck connected thereto. 23, and a nut that is loosely inserted into the neck portion 23 and is screwed onto a male screw 13 on the outer periphery of the valve port 4 containing the target insect valve 1 to fix the connecting end 22 to the valve port 4. 24, and a fork portion 28' that is inserted into a cylindrical opening 26 provided in the main body so as to pass through the connecting end portion 22 and the neck portion 23 and engages with the target insect valve 1 at the tip. an operating shaft 28 and a port 34 fixed to the main body 21 and communicating with the connecting end 22 via a passage 35 in the main body and the neck 23;
and a sealing member 38 for preventing leakage of fluid from around the operating shaft 28.

[For production]

Since the insect valve remover 20 of the present invention has the above-described configuration, the connecting end 22 at the tip is fitted into one end of the valve port 4 containing the target insect valve 1, and the nut 24
After fixing, insert the operating shaft 28 into the valve port 4, catch the engaging part 10 of the insect valve 1 with the fork part 28' at the tip, and rotate it in the loosening direction.
The insect valve 1 as a whole moves from its fixed position, creating a large gap between the inner wall of the central opening 5 of the port 4 and the insect valve 1. Since this gap has a much larger cross-sectional area than the original valve opening of the insect valve 10, the resistance that the fluid that flows through the connecting end 22, neck 23, passage 35, and port 34 receives from the insect valve 1 is significantly reduced, and the fluid flows. It will flow easier.

Moreover, all of these connection work and operations are performed with the fluid sealed by the sealing member 38, etc.
Processing can be performed quickly and safely without leaking fluid to the outside.

〔Example〕

In FIG. 1, reference numeral 1 indicates an insect valve to be operated by the insect valve remover of the present invention, which is installed, for example, in a service valve installed in a car air conditioner compressor. The illustrated insect valve 1 has a valve portion 2 and a body packing 3, and is screwed into a female screw portion 6 provided in a central opening 5 of a valve port 4, and the body packing 3 is inserted into a stepped portion 7 of the opening. The openings 5 are fixed in close contact, and the outflow of fluid from the opening 5 is sealed. Reference numeral 8.9 indicates a male screw portion of the insect valve, reference numeral 10 indicates an engaging portion with which a fork-shaped tool engages when screwing in as described above, and reference numeral 11 indicates a valve spindle.

A step is formed on the outer periphery of the end of the valve port 4.
A male screw 13 for screwing into the connector is carved on the outer surface of the large diameter portion, and a cylindrical surface 14 and a tapered surface 15 at the tip are provided on the small diameter portion. The above is the structure of a common insect valve and the valve port that houses it.

In FIGS. 1 to 3, reference numeral 20 shows an embodiment of the insect valve remover of the present invention. FIG. 4 shows the state in which it is attached.

The insect valve remover 20 of the present invention has a small dish-shaped connecting end 22 fixed to the tip of the main body 21.
A fixing nut 24 is loosely inserted into the neck portion 23 of the device, using the end portion 22 as a retaining stop. A rubber gasket 25 is packed inside the connecting end 22.

A cylinder portion 26 is provided inside the main body 21,
In the illustrated case, an operating shaft 28 having a flange portion 27 that slidably fits into the cylinder portion 26 is inserted. Operation axis 28
A bifurcated fork portion 28' is formed at the tip of the valve, and as described above, the fork portion 28' is connected to the engaging portion 1 of the insect valve.
0. A hole 28'' drilled in the center of the tip of the operating shaft 28 has a depth and diameter sufficient to accommodate the spindle 11 of the insect valve.

An operating knob 29 is attached to the opposite end of the operating shaft 280 by serrations 30.

In the illustrated embodiment, an end plate 31 is fixed to the main body 21 with an appropriate number of screws 32, and a bearing portion 3 is attached to the end plate 31.
3 is provided in a protruding manner, and supports the aforementioned operating shaft 28, also serving as a retainer. Further, the end plate 31 is provided with a boat 34 to which a hose connector (not shown) is screwed.
The boat 34 communicates with the neck 23 via a passage 35 bored in the body 21. 36.37.3 in the diagram
8 indicates a sealing member such as an O-ring.

FIG. 4 shows the insect valve remover of the present invention attached to the refrigerant circuit of an air conditioner. 40 is a compressor for compressing refrigerant, 41 is a condenser, 42 is a reservoir, 43 is an expansion valve, and 44 is an evaporator. In the illustrated example, service valves 45 and 46 for injecting and discharging refrigerant are provided between the reservoir 42 and the expansion valve 430 and between the evaporator 44 and the low pressure side of the compressor 40, respectively. As shown by the broken line, a service valve 47 may be provided on the high pressure side of the compressor 40.

These service valves 45 to 47 have the above-described insect valve 1 built therein, and are normally in a closed state.

Before use, a suitable number of insect valve removers 20 of the present invention are
As shown in FIG. 1, it is attached to the valve port 4 of each service valve 45-47. The connecting end 22 is the nut 2
4 to the male screw 13 of the boat 4, it is firmly fixed to the boat 4, and the rubber packing 25 is pressed against the tapered surface 15 to prevent fluid leakage at the connection.

A hose 48 of a refrigerant recovery machine 50 is connected to the boat 34 of the valve remover 20 of the present invention by a connector (not shown) or the like.

Next, while slightly rotating the knob 29 of the insect valve remover 20 of the present invention, the operating shaft 28 is gently inserted to the left in FIG. Fork portion 2 provided at the tip of the operating shaft 28
When it is felt that the part 8' is fitted into the engaging part 10 of the insect valve 1, the knob 29 is rotated in the direction that the screws 6, 8, and 9 of the insect valve 1 are loosened. Thereby, the body packing 3 of the insect valve 1 separates from the step 7 provided in the center opening 5 of the boat 4, forming a large opening that bypasses the original valve part 2 of the insect valve 1. This opening is knob 2
9 and rotate the entire insect valve 1 together with the operating shaft 28.
Moving it toward the right in the figure further expands the effective area. In the illustrated example, it can be moved further to the right beyond the range of the female screw 6, and the movable range is indicated by the distance β in FIG.

The opening created by the separation of the body packing 3 from the stepped portion 7 provides a much larger flow path area than when the valve portion 2 is open, so fluid in the refrigerant circuit etc. can pass through the insect valve 1 with almost no resistance. The refrigerant bypasses the valve port 4, passes through the neck 23, passage 35, and boat 34, and is guided to the refrigerant recovery machine 50 and the like.

〔Effect of the invention〕

The features of the insect valve remover of the present invention include the installation of related equipment,
Operations such as removal, removal and movement of insect valve 1,
All of these operations can be performed while keeping the fluid sealed, and there is no risk of leaking harmful gases into the atmosphere during these operations, and the bug valve can be moved in the direction of removal as a whole. This reduces fluid resistance and allows work to be carried out quickly.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view showing an embodiment of the insect valve remover of the present invention in a state engaged with an insect valve, FIG. 2 is a perspective view of the embodiment, FIG. 3 is a side view, and FIG. The figure is a conceptual diagram showing the connection points when the valve remover according to the present invention is used in the refrigerant circuit of an air conditioner. 1°゛° insect valve, 3... body packing, 7... stepped portion, 10... engaging portion, 14... cylindrical surface, 21... main body, 23... neck, 25. ...Go11 packing, 28...operation shaft, 29...knob, 35...passage, 36.37.38...seal member, 40...compressor, 45.46.47... Service valve, 48...hose, 50...refrigerant recovery machine. ...valve, ...female screw, ...male screw, 3...b! , 1 Screw, 0... Insect valve remover, 2... Connection end, 4... Nut, 6... Cylinder, 8'... Fork part, 4... Port, 20... - Insect valve remover 40 of the present invention...Compressor 45.46.47...Service valve 5018. Refrigerant recovery machine

Claims (1)

[Claims] A main body having a small dish-shaped connecting end at the tip and a neck connected to the neck, and a male screw on the outer periphery of a valve port that is loosely inserted into the neck and houses the target insect valve, and the connecting end is connected to the valve. an operating shaft having a nut fixed to the port, and a fork portion that is inserted into a cylindrical opening provided in the main body so as to pass through the connecting end portion and the neck portion, and that engages with the target insect valve at the tip; and a port that is fixed to the main body and communicates with the connection end via a passage within the main body and the neck, and a seal member that prevents leakage of fluid from around the operating shaft. An insect valve remover featuring: