JPH0550253U - Check valve with check valve - Google Patents

Abstract

(57) [Summary] [Purpose] Preventing abnormal pressure rise on the secondary side by assuming a fixed union type water stopcock that does not easily create a step in the flow path, and by properly incorporating a check valve unit and coil spring in it. A stopcock with a check valve having the smallest pressure loss among the stopcocks with a check valve capable of exerting its function. [Structure] A check valve unit is slidably inserted into a union fastened to the secondary side of the main body, a diameter expansion portion is formed on the ball valve downstream side of the main body, and a ring is provided on the check valve upstream side. A member is arranged and a coil spring is mounted between the expanded diameter portion and the ring member, and the inner diameters of the ring member and the coil spring are set to be substantially the same as the inner diameter of the main body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stopcock with a check valve, and particularly to measures for preventing abnormal pressurization and pressure loss reduction on the secondary side of the check valve.

[0002]

[Prior Art]

 Conventionally, as a water stopcock with a check valve, for example, as disclosed in Japanese Utility Model Laid-Open No. 2-46170, a check valve unit is slidable in a union of a ball-type water stopcock having a telescopic union. A coil spring is provided on the primary side of the check valve unit, and this coil spring is supported by a spring receiver fixed to the union, and a recess into which the spring receiver can be inserted as the union slides. Since the check valve unit itself moves to the primary side against the biasing force of the coil spring when the abnormal pressure rise occurs on the secondary side, the volume on the secondary side increases. It is known to absorb and reduce the pressure rise on the secondary side.

[0003]

[Problems to be solved by the device]

 By the way, in general, there is a desire to reduce pressure loss as much as possible for a stop valve with a check valve, and this is due to the fact that a check valve with a function to prevent abnormal pressure increase on the secondary side as described above is provided. Water taps are being demanded in the same way. Furthermore, further improvements in compactness and durability are desired.

The present invention has been made paying attention to such a point, and an object thereof is to presume a fixed union type water faucet in which it is difficult to form a step in the flow path, and the reverse of this. Providing the check valve unit and coil spring properly provides the stop valve with check valve that has the smallest pressure loss among the stop valve with check valve that can exert the function of preventing abnormal pressure rise on the secondary side. To do.

[0005]

Means for Solving the Problems In order to achieve the above object, the structure of the present invention is a ball type in which a check valve unit is slidably inserted in a union fastened to the secondary side of a main body. The target is a stopcock with a check valve. On the other hand, an expanded diameter portion is formed on the downstream side of the ball valve of the main body, a ring member is arranged on the upstream side of the check valve, and a coil spring is mounted between the expanded diameter portion and the ring member. The inner diameters of the ring member and the coil spring are set to be substantially the same as the inner diameter of the main body.

[0006]

[Action]

 With the above configuration, when abnormal pressure rise occurs on the secondary side, the check valve unit itself moves to the primary side against the biasing force of the coil spring and the volume on the secondary side increases, so the secondary side The rise in pressure is absorbed and relieved.

Further, since a spring receiver like the above-mentioned conventional stop valve-equipped water stopcock is not required and therefore a concave portion is not required to be provided, a step does not appear between the main body and the coil spring. The inner diameters of the body, the ring member, and the coil spring are almost the same, and in the coil spring, the laminar flow is maintained even between the strands to form a closed flow path, so that the flow path is smooth. Low pressure loss.

Further, since there is no spring receiver, the total length of the water stopcock is shortened accordingly. Further, in the above-mentioned conventional stop valve with check valve, the expansion and contraction union expands and contracts due to the fluctuation of the internal pressure, which causes extra stress on the connecting pipe. No such stress is applied. Moreover, in the above-mentioned conventional stop valve with check valve, since the check valve unit is built in the telescopic union, which is separate from the main body, it is easy to vibrate with the connecting pipe, but in the present invention, the union is fastened to the main body. It is difficult to vibrate.

[0009]

【Example】

 Embodiments of the present invention will be described below. In FIG. 1, reference numeral 1 is a main body of a water stopper equipped with a ball valve 2, 3 is a union fastened to a secondary side of the main body 1, and 5 is a check valve unit slidably inserted in the union 3. The housing 5a, the guide cylinder 5b, the valve body 5c inserted through the guide cylinder 5b, and the internal spring 5d inserted into both of these members. Further, an enlarged diameter portion 7 is formed on the downstream side of the ball valve 2 of the main body 1. Further, 8 is a valve seat ring abutting on the valve body 5c, 9 is a ring member arranged on the primary side of the valve seat ring 8, and a coil spring 10 is provided between the enlarged diameter portion 7 and the ring member 9. Is installed. The inner diameters of the ring member 9 and the coil spring 10 are set to be substantially the same as the inner diameter of the main body 1.

Therefore, in the above embodiment, when abnormal pressure rise occurs due to the water hammer or the like on the secondary side, the check valve unit 5 itself moves to the primary side against the biasing force of the coil spring 10. Since the volume on the secondary side increases, the rise in pressure on the secondary side is absorbed and mitigated.

Further, since a spring receiver such as a conventional stopcock with a check valve is not required and therefore a concave portion is not required to be provided, a step cannot be formed between the main body 1 and the coil spring 10, and The inner diameters of the main body 1, the ring member 9 and the coil spring 10 are almost the same, and in the coil spring 10, the laminar flow is maintained even between the strands, and a closed flow path is actually formed. Smooth road and low pressure loss.

Further, since there is no spring receiver, the total length of the water stopcock is shortened accordingly. Further, since the union 3 is fastened to the main body 1 and does not expand and contract like a conventional stop valve with a check valve, extra stress is not applied to the connecting pipe. Moreover, since the union 3 having the built-in check valve unit 5 that receives the secondary pressure is fastened to the main body 1, there is no movable part that vibrates together with the connecting pipe, and the connecting pipe is a flexible hose. It is especially effective for

[0013]

[Effect of the device]

 As described above, the stop valve with check valve of the present invention is configured such that the check valve unit is slidably inserted into the union fastened to the secondary side of the main body, and the check valve unit is provided on the downstream side of the ball valve of the main body. An expanded diameter part is formed, a ring member is arranged on the upstream side of the check valve, and a coil spring is mounted between the expanded diameter part and the ring member, and the inner diameters of the ring member and the coil spring are set to the inner diameter of the main body. Since the settings are almost the same, it is possible to absorb and mitigate the pressure rise when abnormal pressure rise occurs on the secondary side, smooth the flow path to reduce pressure loss, and even when the fluid pressure is low, The fluid can be supplied smoothly, the total length of the water stopcock can be shortened due to its structure, and no extra stress is applied to the connecting pipes, and there are no moving parts in the connecting pipes, and there is no pipe vibration.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment.

[Explanation of symbols]

 1 Main body 2 Ball valve 3 Union 5 Check valve unit 7 Expanding part 9 Ring member 10 Coil spring

Claims (1)

[Scope of utility model registration request] 1. A ball-type check valve water stop valve with a check valve, wherein a check valve unit is slidably inserted in a union fastened to a secondary side of the body, the ball valve downstream side of the body. An enlarged diameter portion is formed on the check valve, a ring member is arranged on the upstream side of the check valve, and a coil spring is mounted between the enlarged diameter portion and the ring member. A stopcock with a check valve, which is set to be almost the same as the inner diameter.