CN204312798U - Band patch safety valve - Google Patents

Abstract

A safety valve with a plug. The utility model mainly solves the problem that the plastic pressure sleeve of the existing safety valve is easy to age and shrink, thereby falling off from the knob, making the performance of the safety valve invalid and the service life short. It is characterized in that: the plastic pressure sleeve is arranged in the valve body, the diameter of one end of the plastic pressure sleeve is consistent with the diameter of the inner cavity of the valve, and is offset against the sealing diaphragm, so that the sealing diaphragm and the channel of the inner cavity of the valve are sealed and matched; the plastic The other end of the compression sleeve is a circular frustum-shaped clamping joint, and the middle part is provided with a slot, and the knob is provided with a clamping slot for clamping with the clamping joint; the slot is provided with a plug piece matching the slot. The advantage is that a plug piece is provided in the slot of the clamping joint of the plastic compression sleeve, which can prevent the clamping joint from shrinking due to aging, ensure the clamping connection between the knob and the plastic compression sleeve, and improve the service life of the safety valve.

Description

Safety valve with plug

technical field

The utility model relates to a safety valve, in particular to a safety valve with a plug.

Background technique

The safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. .

At present, in the water flow channel, the general safety valve includes a valve body, an upper cover, a knob, a sealing diaphragm, a plastic pressure sleeve, and an elastic reset piece. The plastic pressure sleeve is made of elastic plastic material and is snapped into the knob. After the safety valve is used for a long time, the elastic plastic material is easy to age and shrink, which affects the snap-fit relationship between the knob and the plastic sleeve, causing the plastic sleeve to fall off, causing the performance of the safety valve to fail, and the service life is short.

Utility model content

In order to overcome the shortcomings of the background technology, the utility model provides a safety valve with a plug, which solves the problem that the plastic pressure sleeve of the existing safety valve is easy to age and shrink, so that it falls off from the knob, making the performance of the safety valve invalid and the service life short.

The technical solution adopted by the utility model: a safety valve with a plug, including a valve body, an upper cover, a knob, a sealing diaphragm, a plastic pressure sleeve, and an elastic reset piece; the upper cover is arranged on the valve body, and the The knob is set on the upper cover; the outer edge of the sealing diaphragm is sandwiched between the valve body and the upper cover,

The plastic compression sleeve is arranged in the valve body, and the diameter of one end of the plastic compression sleeve is consistent with the diameter of the inner cavity of the valve, and is offset against the sealing diaphragm, so that the sealing diaphragm and the channel of the inner cavity of the valve are sealed and matched; the other end of the plastic compression sleeve is It is a frustum-shaped snap joint, with a slot in the middle part, and the knob is provided with a slot for snap-fitting with the snap joint; the slot is provided with a plug matching the slot.

The plastic pressure sleeve is in the shape of a "mountain".

The valve body and the upper cover are fixedly connected by threads.

A sealing pressure ring is also provided between the valve body and the upper cover.

The top of the knob is provided with a top cover covering the clamping groove.

The elastic reset member includes an upper spring seat, a lower spring seat and a spring sleeved on the plastic pressure sleeve, and the upper spring seat is threadedly connected with the upper cover.

The beneficial effects of the utility model are: adopting the above scheme, a plug is provided in the slot of the plastic compression sleeve clip joint, which can prevent the clip joint from shrinking due to aging, ensure the clamping connection between the knob and the plastic compression sleeve, and improve the service life of the safety valve .

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

As shown in the figure, a safety valve with a plug includes a valve body 1, an upper cover 2, a knob 3, a sealing diaphragm 4, a plastic pressure sleeve 5, an upper spring seat 9, a lower spring seat 10 and a spring 11; The upper cover 2 is arranged on the valve body 1, and the knob 3 is arranged on the upper cover 2; wherein the upper cover and the valve body are fixedly connected by threads, and a sealing pressure ring is provided, which is not only simple in structure, but also more convenient to assemble;

The outer edge of the sealing diaphragm 4 is sandwiched between the valve body 1 and the upper cover 2; the plastic gland 5 is in the shape of a "mountain" and is arranged in the valve body 1, and one end of the plastic gland 5 The diameter is consistent with the diameter of the inner cavity of the valve body 1, and is offset against the sealing diaphragm 4, so that the sealing diaphragm 4 is tightly attached to the inner wall of the inner cavity of the valve body 1, and can seal the inner cavity passage of the valve body 1, and its sealing performance is good;

The other end of the plastic press sleeve 5 is a conical clamping joint 51, the middle part of which is provided with a slot 42, and the knob 3 is provided with a clamping slot 31 which is clamped with the clamping joint 51; There is a plug piece 6 adapted to the slot 42. The clamping structure is not only simple in structure, but also easy to assemble. At the same time, the plug piece 6 is set in the slot 42, which can prevent the snap joint 51 from shrinking due to aging, and ensure that the knob 3 is in good contact with the plastic. The clamping connection of the pressure sleeve 5 can improve the service life of the safety valve.

Wherein, the upper spring seat 9, the lower spring seat 10 and the spring 11 are sleeved on the plastic pressure sleeve 5, and the upper spring seat 9 is threadedly connected with the upper cover 2, so that the elastic size of the upper spring 11 can be adjusted conveniently.

Claims (6)

1. be with a patch safety valve, comprise valve body (1), upper cover (2), knob (3), seal membrane (4), plastics gland (5), elastic reset part; Described upper cover (2) is arranged on valve body (1), and described knob (3) is arranged on upper cover (2); Described seal membrane (4) outward edge is located between valve body (1) and upper cover (2),

It is characterized in that: described plastics gland (5) is arranged in valve body (1), described plastics gland (5) one end diameter is consistent with body cavity diameter, and offsets with seal membrane (4), and seal membrane (4) and valve body (1) bore passages are sealed and matched; Described plastics gland (5) the other end is round table-like clamping joint (51), and intermediate portion is arranged with a short slot (42), and described knob (3) is provided with the buckling groove (31) with clamping joint (51) clamping; The patch (6) adaptive with short slot (42) is provided with in described short slot (42).

2. band patch safety valve according to claim 1, is characterized in that: described plastics gland (5) is in " mountain " character form structure.

3. band patch safety valve according to claim 1, be is characterized in that: be fixedly connected with by screw thread between described valve body (1) with upper cover (2).

4. band patch safety valve according to claim 3, is characterized in that: be also provided with sealing clamping ring (7) between described valve body (1) and upper cover (2).

5. band patch safety valve according to claim 1, is characterized in that: described knob (3) top is provided with the top cover (8) covering buckling groove (31).

6. band patch safety valve according to claim 2, it is characterized in that: described elastic reset part comprises the upper spring seat (9) be set on plastics gland (5), lower spring cup (10) and spring (11), and described upper spring seat (9) is threaded with upper cover (2).