Diaphragm of deluge valve

Abstract

The utility model relates to the field of fire-fighting equipment, in particular to a deluge valve diaphragm which comprises a diaphragm body, a heat tracing band and a protective strip, the heat tracing band is embedded and laid in the diaphragm body in a snakelike mode, and the heat tracing band can generate heat to prevent the diaphragm body from hardening at low temperature after being electrified; and the protective strip is laterally and fixedly connected to the outer wall of the diaphragm body and is arranged on one side of the upstream face adjacent to the water inlet cavity of the deluge valve. The diaphragm of the deluge valve is improved, the heat tracing band is embedded in the diaphragm body, and the diaphragm body can be heated to avoid hardening when the water temperature is too low, so that the diaphragm can keep good elasticity and sealing performance, and the deluge valve can meet the requirement of a low-temperature environment; and the protective strips for blocking the sand grains are arranged on the outer wall of the diaphragm body, so that the scouring of the sand grains in water to the sealing surface of the diaphragm body can be reduced, the service life of the diaphragm can be prolonged, and the sealing performance of the diaphragm can be improved.

Description

Technical Field

[0001] The utility model relates to the field of fire fighting equipment, in particular to a deluge valve diaphragm. Background Art

[0002] Deluge valve is a key device used to control the automatic sprinkler fire extinguishing system in fire protection facilities. It has multiple functions such as automatic opening, alarm and interlocking pump start. Diaphragm type deluge valve is the most common type of deluge valve. Its diaphragm is the key control component of the deluge valve. It is usually made of wear-resistant, heat-resistant and corrosion-resistant elastic rubber such as butyl rubber, silicone rubber, fluororubber, etc. The diaphragm is generally installed in the control chamber of the deluge valve body. When the deluge valve is in the quasi-working state, the pressurized liquid or gas medium in the control chamber drives the diaphragm to deform elastically to block the main channel of the deluge valve body, so that the water inlet chamber and the water outlet chamber cannot be connected; when extinguishing the fire, the control chamber is depressurized, and the diaphragm rebounds to release the blockage of the main channel, so that the water inlet chamber and the water outlet chamber are connected. Deluge valves are divided into wet and dry types according to the different media in the control chamber. Since the control medium of dry deluge valves is compressed air, if dry deluge valves are used in fire protection systems, they need to have an uninterrupted air supply system, which complicates the fire protection system and increases the operating cost. Therefore, dry deluge valves are mostly used in special environments with long-term low temperatures; while the control medium of wet deluge valves is pressurized water, which is easy to obtain in sprinkler systems, so wet deluge valves are the most widely used. However, since the diaphragm made of rubber is easy to harden at low temperatures, and since the pressurized water in the control chamber flows slowly, there are also several days in winter in some parts of southern my country where the water temperature is too low. At this time, the diaphragm of the wet deluge valve occasionally hardens or freezes at low temperatures, affecting its elasticity and sealing. In addition, the diaphragm of the deluge valve can only close the main pipeline in a deformed state. There will be fine sand particles mixed in the fire protection water, which will scour the water-facing surface of the diaphragm deformed into a spherical shape for a long time, and will also affect the life and sealing of the diaphragm. In view of this, it is necessary to improve the diaphragm of the deluge valve. If a heating element can be embedded in the diaphragm, the diaphragm body can be heated when the water temperature is too low to prevent it from hardening, so that the diaphragm can maintain good elasticity and sealing; if a protective strip to block sand particles can be set on the outer wall of the diaphragm to reduce the erosion of the sealing part, the life and sealing of the diaphragm can be improved. This is a problem to be solved in this case. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the utility model discloses a deluge valve diaphragm, including a diaphragm body, a heating belt and a protective strip. The heating belt is embedded and serpentinely laid in the diaphragm body. After the heating belt is energized, it can generate heat to prevent the diaphragm body from hardening at low temperatures; the protective strip is fixedly connected to the outer wall of the diaphragm body and is placed on the side of the water-facing surface adjacent to the deluge valve water inlet cavity. The utility model improves the diaphragm of the deluge valve, embeds the heating belt in the diaphragm body, and heats the diaphragm body to avoid hardening when the water temperature is too low, so that the diaphragm can maintain good elasticity and sealing, so that the deluge valve can adapt to the needs of low-temperature environments; and a protective strip for blocking sand particles is arranged on the outer wall of the diaphragm body, so that the sand particles in the water can reduce the scouring of the sealing surface of the diaphragm body, and the life and sealing of the diaphragm can be improved.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A deluge valve diaphragm can be installed in a deluge valve control chamber to control the opening and closing of the deluge valve. The diaphragm is characterized by comprising a diaphragm body and a heating belt, wherein the heating belt is embedded in the diaphragm body and laid in a serpentine shape. When the heating belt is energized, heat can be generated to prevent the diaphragm body from hardening at low temperatures.

[0006] The heating belt is a flexible heating belt.

[0007] The diaphragm body is an elastic body made of elastic heat-resistant and wear-resistant rubber. When squeezed by external water pressure, the diaphragm body can be elastically deformed into an outwardly protruding hemispherical shape, and the formed outer spherical surface is the sealing surface for controlling the closing of the rain valve.

[0008] The shower valve diaphragm also includes a protective strip, which is an elastic strip made of elastic heat-resistant and wear-resistant rubber. The protective strip is fixedly connected to the outer wall of the diaphragm body and is placed on the water-facing side adjacent to the water inlet cavity of the shower valve.

[0009] Furthermore, the softness of the protection strip is greater than the softness of the diaphragm body.

[0010] From the above description, it can be seen that the advantages of the deluge valve diaphragm provided by the utility model are: first, a heating belt is embedded in the diaphragm body, and the diaphragm body can be heated to avoid hardening when the water temperature is too low, so that the diaphragm can maintain good elasticity and sealing, so that the deluge valve can adapt to the needs of low temperature environment; second, a protective strip for blocking sand particles is arranged on the outer wall of the diaphragm body, so as to reduce the scouring of the sealing surface of the diaphragm body by sand particles in the water, and the life and sealing of the diaphragm can be improved. The utility model has reasonable design, simple structure, low cost and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a general schematic diagram of a deluge valve diaphragm described in the utility model;

[0012] Figure 2 for Figure 1 A-direction schematic diagram in FIG.

[0013] Figure 3 It is a schematic diagram that the diaphragm body is installed in the control chamber of the deluge valve and the deluge valve is in a closed state.

[0014] Reference numerals:

[0015] 1. Diaphragm body; 2. Heating belt; 3. Protective strip; 800. Deluge valve water inlet chamber; 900. Deluge valve control chamber. DETAILED DESCRIPTION

[0016] The present invention is further described below through specific implementation methods.

[0017] like Figures 1 to 3 As shown, a diaphragm of a deluge valve described in the utility model can be installed in a deluge valve control chamber 900 to control the opening and closing of the deluge valve, and includes a diaphragm body 1, a heating belt 2 and a protective strip 3. The heating belt 2 is embedded and serpentinely laid in the diaphragm body 1. The heating belt 2 is a flexible heating belt, which is a well-known technology. After the heating belt 2 is powered on, it can generate heat to prevent the diaphragm body 1 from hardening at low temperatures. The diaphragm body 1 is an elastomer made of elastic heat-resistant and wear-resistant rubber. The elastomer is usually a round rubber piece with a concave arc surface and a mounting hole. When squeezed by external water pressure, the diaphragm body 1 can be elastically deformed into a hemispherical shape protruding outward. The formed outer spherical surface is a sealing surface when controlling the closing of the deluge valve. The sealing surface can be tightly pressed against the ridge and cavity mouth at the junction of the deluge valve water inlet chamber 800 and the water outlet chamber to completely block the deluge valve water inlet chamber 800 and the water outlet chamber. The protective strip 3 is an elastic strip made of elastic, heat-resistant and wear-resistant rubber. The protective strip 3 is fixedly connected to the outer wall of the diaphragm body 1 and is placed on the water-facing side adjacent to the water inlet chamber 800 of the deluge valve. The softness of the protective strip 3 is greater than that of the diaphragm body 1. The protective strip 3 can be deformed together with the elastic deformation of the diaphragm body 1 and become an arc to enclose the water-facing side of the sealing surface of the deformed diaphragm body 1, thereby preventing the sand particles mixed in the water of the water inlet chamber 800 of the deluge valve from directly scouring the sealing surface of the diaphragm body 1.

[0018] Before using the deluge valve controlled by the diaphragm, set the water temperature range value that needs to be heated to prevent the diaphragm from hardening in the fire protection system. If the fire protection system detects that the water temperature of the deluge valve is too low and is within the set water temperature range that requires the heating belt 2 to be started for heating, the fire protection system can automatically energize the heating belt 2 to heat the diaphragm body 1 so that the diaphragm body 1 maintains its elasticity and sealing.

[0019] The utility model improves the diaphragm of the deluge valve, embeds a heating belt 2 in the diaphragm body 1, and can heat the diaphragm body 1 to avoid hardening when the water temperature is too low, so that the diaphragm can maintain good elasticity and sealing, so that the deluge valve can adapt to the needs of low temperature environment; and a protective strip 3 for blocking sand particles is arranged on the outer wall of the diaphragm body 1, so that the scouring of the sealing surface of the diaphragm body 1 by sand particles in the water can be reduced, and the service life and sealing of the diaphragm can be improved.

[0020] The above is only a specific embodiment of the present utility model, but the design concept of the present utility model is not limited to this. Any non-substantial changes to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A deluge valve diaphragm, which can be installed in a deluge valve control chamber (900) to control the opening and closing of the deluge valve, characterized in that: The invention comprises a diaphragm body (1) and a heating belt (2), wherein the heating belt (2) is embedded in the diaphragm body (1), and the heating belt (2) can generate heat after being energized to prevent the diaphragm body (1) from hardening at low temperatures.

2. A deluge valve diaphragm according to claim 1, characterized in that: The heating belt (2) is a flexible heating belt.

3. The deluge valve diaphragm according to claim 1, characterized in that: The diaphragm body (1) is an elastic body made of elastic, heat-resistant and wear-resistant rubber. When squeezed by external water pressure, the diaphragm body (1) can be elastically deformed into a hemispherical shape protruding outward.

4. A deluge valve diaphragm according to claim 3, characterized in that: It also includes a protection strip (3), which is an elastic strip made of elastic, heat-resistant and wear-resistant rubber. The protection strip (3) is fixedly connected to the outer wall of the diaphragm body (1) and is placed on the side adjacent to the water inlet chamber (800) of the shower valve.

5. A deluge valve diaphragm according to claim 4, characterized in that: The softness of the protection strip (3) is greater than the softness of the diaphragm body (1).

Images