EP3257390A1 - Protection device for jet blasting, in particular sandblasting - Google Patents

Abstract

The beam protection device has a communication device and a blasting protective clothing. The communication device has a headphone (24), a microphone (26), a pressure switch (42) and a radio (61), the blasting protective clothing has a helmet and a jacket (22), in particular apron, connected thereto. In the helmet of the headphones (24) and the microphone (26) are arranged. The communication device further comprises a support member (50) receiving the pressure switch (42) and the walkie talkie (61). The support member (50) has fastening means. On a chest-side inside of the sheath (22) holding means are arranged, which cooperate with the fastening means and allow a releasable attachment of the support member (50) on the inside of the sheath (22).

Description

The invention relates to a blasting protection device with a communication device and with a blasting protective clothing according to the preamble of claim 1. Such blasting protection devices are currently offered on the market, for example under the brand name granite.

From the GB 861 167 B If a beam protection device of the type relevant here is known, a communication device is missing. The blasting protective clothing has a helmet and a jacket detachably connected thereto. However, the sheath only partially covers the chest area.

From the DE 20 2010 015 753 U1 Another radiation protection device is known.

The beam protection device is intended to protect persons from blasting agents and their effect, in particular from the dust produced during blasting and the rebound of the blasting abrasives. Sand, spheres (for example metal or glass spheres), water, in particular high-pressure water (more than 500, in particular more than 1000 bar) and dry ice are mainly used as the blasting medium, the use of other blasting agents is possible. The purpose of blasting is to rid surfaces of dirt, for example, to rust. For blasting, blasting guns or similar equipment are used. In order for the operator to be protected by the swirling blasting particles, she carries, inter alia. the helmet. The helmet is supplied with air via a supply air hose. Such helmets are usually made of an outer, solid plastic shell and an inner cushion body, also called inlay. In most cases plastic shell and inlay are separable. The inlay carries the headphones and the microphone. In this case, combinations of headphone and microphone are used in which the microphone is carried by the headset and connected via a flexible region with this, so that it is located substantially in front of the mouth of an operator. But it can also be used microphones that absorb the structure-borne sound, for example, directly connect to the skull.

The blasting protective clothing is detachably connected to the helmet. It prevents abrasive from penetrating the helmet from below. It usually protects at least the chest area of an operator.

In blasting work usually high noise levels prevail. The noise levels are similar to starting jets. Typically, they are in the range of over 120 dB, for example 130 dB. In order to protect the operator against such noise, earplugs are usually worn. But there are also headphones that offer a certain cushioning against external noise via soft support cushions. The high noise level also makes speaking difficult. On the one hand, it hinders speech, on the other hand, the noise generated by the blasting process is absorbed directly by the microphone. The actual message that the operator speaks into the microphone often gets lost.

Now so-called differential microphones are known in the art. The microphone has two separate microphone capsules, one facing the mouth of the speaker, the other averted exactly from this. Both capsules record the ambient noise with practically the same signal. The speaker is only one capsule directly facing, this preferably receives the speech signal. The two capsules are fed to the inputs of a differential amplifier. Due to the difference amplification, the environmental noise is substantially eliminated.

In order for the operator to be able to hear messages as well, the headphone must terminate as soundproof as possible and in this way dampen environmental noise so that essentially the message can be understood. Headphones are used that have headphones for both ears. The shells are heavily padded on the outside and pressed against the ears with pressure to achieve the highest possible acoustic attenuation of the outer sound.

The radio is normally in the receiving state. When the operator wants to send a message, press the push button. Only as long as she presses the push button, the radio is in transmission mode. As the operator wears bulky protective gloves and generally bulky protective clothing, the pressure switch must be easy and accessible, but also dust-proof. The pressure switches are often referred to as PTT switch, in which case the English term push to talk is used in abbreviation.

In an alternative also belonging to the invention, the pressure switch is replaced by a so-called VOX. Here, the radio goes in automatically the transmission mode as soon as the operator speaks sufficiently loud in the microphone. Such circuits have long been known, for example in the field of radio amateurs.

The beam protection device of the type in question is intended in particular for beam protection work in boilers of power plants, also for work in tanks, silos, canals, closed containers, etc. From time to time the boilers of power plants have to be maintained and cleaned. They are shut down and cooled down. People climb through a manhole into the interior of the boiler. By means of blasting devices, the interior of the boiler is cleaned of deposits, etc. This improves the transfer of heat to the heat exchangers, thus increasing the efficiency. However, such boilers are usually metallic cladding, in particular metal foils or sheets are used to shield heat radiation and to avoid heat losses altogether. A boiler is thus essentially a so-called Faraday cage. Radio waves can practically only get in from the open manhole and into the boiler. The manhole usually has a clear diameter that is just enough for an operator, including their protective clothing, to get into the boiler. Accordingly, radio frequencies must be used which have a wavelength which is smaller than the clear diameter of the manhole. Preferably, the frequencies are above 400 MHz, in particular frequencies of 800 MHz and higher are used. Over increased transmission power, e.g. more than 2 watts, you can also achieve an improved wireless connection with a radio located outside the boiler.

The above statements are also relevant to the invention and also apply to them, they can be used to define the invention. The invention will now be discussed in more detail as follows.

The blasting protective clothing, in particular the helmet, is usually associated with an operator, the blasting protective clothing of a person is not used by other people. This alone dictates the hygiene. Radio systems are expensive, they should be able to be replaced quickly, for example, rechargeable batteries can be replaced. Radio systems can work around the clock, people should not do this.

On this basis, it is an object of the invention to improve the known beam protection devices to the effect, while maintaining their advantages that the radio device can be used more favorably and in particular over a period of time which is longer than a layer of a jet worker.

This object is achieved by a beam protection device with a communication device and with a blasting protective clothing, the communication device has a headphone, a microphone, a pressure switch and a walkie-talkie, the blasting protective clothing has a helmet and a jacket connected thereto, in particular apron, in the helmet the headphone and the microphone are arranged, the communication device further comprises a support member which receives the pressure switch and the radio, the support member has fastening means, and on a chest-side inside of the shell holding means are arranged, which cooperate with the fastening means and a releasable attachment of the Allow supporting part on the inside of the sheath.

The invention opens up the possibility of separating the expensive parts of a communication device from the blasting protective clothing. At the end of a shift, an operator may deliver the support member having the walkie-talkie and push-button therein as a compact, handleable unit to the next layer. Possibly. the accumulator of the radio must be replaced by a charged accumulator. In any case, the next layer can continue to work directly with the same radio. It is introduced into the own blasting protective clothing. In this way you can work around the clock, the same radio can be used around the clock, each individual beam worker has his own protective clothing. When replacing only the support member must be attached, his equipment must be connected via one and preferably only one connecting line with the arrangement of microphone and headphones.

The invention thus makes it possible to assign the walkie-talkie to any person, the radiation protection clothing remains individually associated with each individual beam protection workers. The exchange is easy.

The support member is located on the inside of the chest area of the sheath. As a result, the support member is protected by the sheath. The supporting part should not be visible from the outside. The recorded in the support member devices, ie the radio and the pressure switch are arranged protected. In addition, the support member may have pockets that receive the walkie talkie or the pressure switch. This has the additional advantage that the push-button can be placed in an easily accessible place, for example, at the point where the heart is located. A movement of his hand to the heart is easy and obvious for everyone. When the operator moves his hand to the heart, he reaches the pressure switch, as long as this is pressed, the radio is in the transmission mode. For this purpose, it is advantageous that the pressure switch has the largest possible button surface. This should preferably be greater than 5 cm 2. It should also be easy enough pressure to operate the pressure switch. He must be operable at least through the sheath.

Preferably, the walkie-talkie and / or the pressure switch are located between the jacket and the support member. This allows protection for radio or pressure switch. But it is also possible to arrange at least one of radio or pressure switch on the person facing the inner surface of the support member.

The support member preferably has a carrying strap, which makes it easy to handle.

The support member is detachably connected to the inner surface of the chest side of the sheath. Different connection means can be used. The supporting part has fastening means. These fasteners are assigned to the chest-side inside of the sheath holding means. Fasteners and retaining means work together. They can be designed, for example, as male and female press studs, that is to say as snap fasteners. They can also be designed as hooks and eye hooks. Also a Velcro connection is possible.

Fig. 1:

eine perspektivische Darstellung eines Helms mit Kopfhörer und Mikrofon,

Fig. 2:

eine perspektivische Darstellung eines Druckschalters,

Fig. 3:

eine perspektivische, vereinfachte Darstellung einer Schutzbekleidung und

Fig. 4:

eine Draufsicht von innen auf die Brustseite einer Ummantelung mit an dieser befestigtem Tragteil und Zubehör.

Further advantages and features of the invention will become apparent from the remaining claims and the following description of a non-limiting embodiment of the invention, which is explained in more detail below with reference to the drawings. In this drawing show:

Fig. 1:

a perspective view of a helmet with headphones and microphone,

Fig. 2:

a perspective view of a pressure switch,

3:

a perspective, simplified representation of a protective clothing and

4:

a plan view from the inside on the chest side of a casing with attached to this support member and accessories.

The FIGS. 1 and 3 show essential elements of a blasting protective clothing, namely an inlay 20 of a known helmet and a sheath 22. This has a neck area, which is connectable to the helmet, it also has a chest area and a back area. The chest area is so large that at least part of the chest of an operator is covered. Preferably, the chest area extends approximately to the waist.

FIG. 1 shows the inlay 20, also called insert part, with a headphone 24 and a microphone 26. The headphone 24 has a neckband 28. Due to the neckband 28 a higher contact pressure to the ears of a user is achieved as a headband, also can be a neckband better in the inlay 20 arrange as a headband. In order for the headphone 24 to be held precisely in the inlay 20, it additionally has a headband 29. The inlay 20 has a shell 30 made of a plastic and a cushioning body 32 which is located inside the shell 30 and is supported by it. The headband 29 rests on the top and on the outside of the shell 30. It is optionally fixed with an adhesive, for example adhesive strips.

The microphone 26 is connected via a flexible portion 34 with the headphone 24. As already explained above, the microphone has two microphone capsules, one capsule facing the inlay 20 directly, another capsule 36 is arranged in the opposite direction to the receiving direction of the first capsule. Both capsules therefore have 180 ° opposite receiving directions. Both capsules are identical.

The headphone 24 has two soft, ring-shaped support pads 38. Within each of these is a speaker. The support pads 38 achieve an attenuation of at least 70, preferably at least 90 dB. Preferably they are flat, namely a maximum of one to 2 cm thick. As a result, they fit well into the shell 20. Preferably, they have a filling with liquid or gel.

The unit of headphone 24 and microphone 26 is also referred to as a headset. It can be connected via a supply line 40 with the other parts of the device, it will be discussed further below.

FIG. 2 shows a pressure switch 42, also called push button, as it is suitable for the application of the invention. He has an actuating surface 44, which is designed here as a circular area and has a diameter of at least 2.5 cm. It is bigger than a 2 euro coin. It faces a housing of the pressure switch 42, so that its edge area is active. A slight pressure on the actuating surface 44 is sufficient to activate the pressure switch 42.

The sensitivity of the actuating surface 44 is geared to that through a sheath 22 through the pressure switch 42 can be actuated. The operation is carried out by a relatively wide area, such as the palm of your hand, and not by a sharp object, such as a pencil.

The pressure switch 42 has a connecting line 46 and an input socket 48. The latter, the supply line 40 is connected, which is equipped with a corresponding connector, such as jack.

FIG. 4 shows a view from the inside of the chest region of the sheath 22. A support member 50 is connected to the chest area. As Fig. 3 shows, the chest region of the sheath 22 is provided with four snap fastener parts 52, which are designed here as male snaps. The support member 50 has in a corresponding arrangement four counterparts 54, which are designed here as female snap fastener parts. These counterparts 54 form fasteners. The push-button parts 52 form holding means. The push-button parts 52 and the counterparts 54 are geometrically arranged in the same way, their arrangement has a coding. As a result, it is only possible in a single way to attach the support member 50 to the sheath 22.

The support member 50 is a flat, flexible part in the embodiment shown. It essentially has a rectangular shape. The size is essentially through the intended to be recorded. The width is typically between 15 and 25 mm, the length advantageously between 20 and 35 cm. Other sizes are possible. The support member 50 is made of leather, a strong fabric or the like, for example. The support member 50 has a carrying loop 56, which is located in the vicinity of an upper edge. This makes it easy to handle. The support member 50 has a switch pocket 58 and a radio pocket 60. They are mounted in the embodiment shown here on that surface of the support member, which faces the sheath 22. As a result, they are located between the casing 22 and the supporting part 50. The pockets 58, 60 are adapted in their size to the respective object to be picked up, namely the pressure switch 42 according to FIG FIG. 2 and a walkie talkie 61 as it is offered in the market. For example, a Motorola DP 1400 (registered trademark) is used.

It can be seen that the size of the support member 50 is determined essentially by the size of the pockets 58, 60. The size of the pockets 58, 60 is determined by the size of the walkie-talkie 61 and the pressure switch 45. The support member 50 only needs to be large enough to hold the pockets 58, 60 well. Parts 52 to 56 require less space. The support member 50 may also be formed as a bag or as a grid.

As FIG. 4 shows, located in the radio pocket 60 walkie talkie 61 via the connecting line 46 to the pressure switch 42 is connected. This in turn is connected via the lead 40 of the unit of headphone 24 and microphone 26. When transferring the carrying part 50 with equipment to another person, it must be detached from the casing 22 and the feed line 40 must be disconnected. For this purpose, the supply line 40 is subtracted from the pressure switch 42. Other solutions are possible. Thus, it is also possible to connect the supply line 40 directly to the radiotelephone 61 and to connect the radiotelephone 61, as shown, via the connecting line 46 only with the pressure switch 42.

Fig. 3 shows a tactile area 62, which is advantageously marked on the outside of the casing 22. Below it is the actuating surface 44 of the pressure switch 42. This makes it easy for an operator to see where the transmission mode can be turned on.

LIST OF REFERENCE NUMBERS

20

inlay

22

jacket

24

headphone

26

microphone

28

neckband

29

headband

30

Bowl

32

cushion body

34

Area

36

capsule

38

rest pad

40

supply

42

pressure switch

44

actuating surface

46

connecting cable

48

input jack

50

supporting part

52

Knocking body

54

counterpart

56

Wrist strap

58

switch pocket

60

Radio pocket

61

radiotelephone

62

Detection range

Claims (10)

Radiation protection device with a communication device and with a blasting protective clothing, the communication device comprises a headphone (24), a microphone (26), a pressure switch (42) and a radio (61), the blasting protective clothing has a helmet and a shell connected thereto (22 ), in particular apron, in the helmet of the headphone (24) and the microphone (26) are arranged, characterized in that the communication device further comprises a support member (50) which receives the pressure switch (42) and the radio (61) in that the support part (50) has fastening means, and holding means are arranged on a breast-side inside of the sheath (22), which cooperate with the fastening means and enable releasable attachment of the support part (50) on the inside of the sheath (22). Radiation protection device according to claim 1, characterized in that the support member (50) is a blank of a flexible, flat material. Radiation protection device according to claim 1 or 2, characterized in that the support part (50) has a switch pocket (58) for the pressure switch (42) and / or a radio pocket (60) for the radio (61), preferably the pockets (58, 60) dustproof and lockable. Radiation protection device according to one of the preceding claims, characterized in that the support member (50) is easily detachably connected to the sheath (22). Radiation protection device according to one of the preceding claims, characterized in that the fastening means of the support member (50) and the retaining means of the sheath (22) allow one and only one kind of association between the support member (50) and sheath (22), in particular fastening means and the retaining means are arranged in a coded manner. Radiation protection device according to one of the preceding claims, characterized in that the supporting part (50) has a carrying loop (56). Radiation protection device according to one of the preceding claims, characterized in that the headphone (24) and the microphone (26) via a supply line (40) are connected via an easily detachable electrical coupling with the pressure switch (42) or the radio (61) is connectable. Radiation protection device according to one of the preceding claims, characterized in that the pressure switch (42) has an actuating surface (44) which is at least as large as a two-euro coin, in particular an area of at least 5 cm ² . Radiation protection device according to one of the preceding claims, characterized in that the pressure switch (42) between the support member (50) and the sheath (22) is located, and preferably also the radio (61) between the support member (50) and the sheath (22) is located. Radiation protection device according to one of claims 1 to 8, characterized in that the pressure switch (42) and / or the radio (61) on the side facing away from the casing (22) side of the support member (50).

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