CN2434497Y - Structural device of non-return pressure relief valve with backflow pressure relief function - Google Patents

Abstract

A structure of check pressure relief valve with backflow pressure relief function is mainly characterized in that a structure comprising a small spring, a baffle ring, a water stop ring and a combined column consisting of a thick column body and a thin column body is additionally arranged at the position of a check device between a water inlet and a water outlet in the existing T-shaped pipe valve, so that when the water pressure at the water outlet exceeds a set value, partial backflow pressure relief is carried out to the water inlet.

Description

Structural device of non-return pressure relief valve with backflow pressure relief function

The utility model relates to a structural device of a reverse check pressure relief valve with backflow pressure relief function.

In the existing water storage type electric water heater, the heated hot water is very likely to flow back to the water inlet pipe at the front end after the user turns off the tap. Since the heated hot water has a large thermal expansion effect, if it encounters When the water heater runs empty due to internal component failure, it is more likely to cause the water pipe at the front end to rupture and leak due to excessive internal pressure, causing water seepage or bulge in the wall. The user has to hire workers to knock down the entire wall in order to replace the broken water pipe. And then back to the original state, very annoying. Therefore, a water valve with backstop function and pressure relief function is generally added at the front end of the water heater inlet pipe now to eliminate the aforementioned disadvantages. However, the creators found that the pressure relief devices of existing non-return pressure relief valves only have a single flow direction, that is, they can only perform one-way non-return action; but in actual use, it is found that if the reverse pressure relief of low-pressure return can be increased Functions will increase the efficiency of use. In view of this, the creators are dedicated to innovation and improvement.

The purpose of this utility model is to provide a backflow relief valve structural device with the function of backflow and pressure relief. In the existing backstop device, a small spring, a retaining ring, a water stop ring and a thick cylinder and a water stop ring are additionally provided. Combining columns and other structures formed by thin cylinders, in this way, when the water pressure at the water outlet exceeds the elastic force of the small spring, it can return to the water inlet to release the pressure.

The purpose of this utility model can be achieved through the following measures:

A non-return pressure relief valve structural device with the function of backflow and pressure relief is provided with a non-return device and a pressure relief device in a T-shaped body, wherein:

The body has a water inlet, a water outlet and a pipe, and the branch pipe is further provided with a pressure relief pipe;

The pressure relief device is used to be installed in the branch pipe, which includes a plug body, a stopper, a spring and a locking body;

The backstop device is installed at the inner edge of the water outlet end of the body, including screws, joint blocks, lock bodies, large springs, small springs, retaining rings, water stop rings, bottom rings, washers, and joint columns; in:

A screw with external thread teeth at the bottom;

The combination block can be screw-locked at the end of the water outlet, and there is a perforation in the center, and the perforation can be passed through by a screw;

The lock body has a perforation with an internal thread in the center, the perforation can be locked by the external thread of the screw, and a protrusion is provided at the bottom of the lock body;

The large spring is sandwiched between the joint block and the bottom ring;

The small spring is sandwiched between the lock body and the stop ring, and its top is combined with the protrusion of the lock body for positioning;

The retaining ring has a U-shaped section and a perforation in the center;

The water stop ring has a perforation in the center;

Bottom ring, the top can limit the water stop ring, and there is a perforation in the center;

Washer with perforation in the center;

The combined post has an internal thread at the top, and the post includes a thick post with a bottom and a thin post above the thick post.

Compared with the prior art, the utility model has the following advantages: in the original backstop device, a structure with backflow and pressure relief function is added, so that the function integrity and function improvement of the existing valve body can be further improved.

The preferred embodiment of the utility model is hereby described with illustrations.

【Illustration】

figure 1. It is a three-dimensional exploded view of the utility model.

figure 2. It is a sectional view of the utility model.

image 3. It is a cross-sectional action state diagram of the utility model when it enters water.

Figure 4. It is a cross-sectional action state diagram of the utility model when it is backstopped and the pressure is released by backflow.

Figure 5. It is a partial enlarged view of Figure 4.

Figure 6. It is a cross-sectional action state diagram of the utility model when it is backstopped and the high pressure is released.

Figure 7. It is a partially enlarged view of Fig. 6 .

Please refer to Fig. 1 and Fig. 2 firstly. The structural device of the non-return pressure relief valve with backflow and pressure relief function of the present utility model is provided with a non-return device 2 and a pressure relief device 4 in the T-shaped body 1. ,in:

The body 1 has a water inlet 10, a water outlet 11 and a branch pipe 12, and the branch pipe 12 is further provided with a pressure relief pipe 13;

The backstop device 2 is installed at the inner edge of the water outlet 11 of the body 1, and includes a screw 20, a joint block 21, a lock body 22, a large spring 23, a small spring 24, a retaining ring 25, and a water stop ring 26 , the bottom ring 27, the washer 28 and the combination column 29, etc.; wherein:

Screw 20, the bottom is provided with external thread 201;

The combination block 21 can be used for screw locking on the end of the water outlet 11, and a perforation 210 is provided in the center, and the perforation 210 can be passed through by the screw 20;

The lock body 22 has a perforation 221 with an internal thread in the center, the perforation 221 can be locked by the external thread 201 of the screw 20, and a protrusion 222 is provided at the bottom of the lock body 22;

The large spring 23 is sandwiched between the joint block 21 and the bottom ring 27;

The small spring 24 is clamped between the lock body 22 and the stop ring 25, and its top is combined with the projection 222 of the lock body 22 for positioning;

The retaining ring 25 has a U-shaped cross section and a perforation 251 in the center;

The water stop ring 26 is provided with a perforation 261 in the center;

The bottom ring 27, the top can limit the water stop ring 26, and the center is provided with a perforation 271;

The washer 28 is provided with a perforation 281 in the center;

Combining post 29, the top has internal thread 291, and its post includes a thick post 292 with a bottom, and a thin post 293 above the thick post 292;

After the combination of the above structures, it is as shown in Figure 2.

In addition, the utility model still includes;

The pressure relief device 4 is used to be installed in the branch pipe 12 , and includes a plug body 41 , a stopper 42 , a spring 43 and a locking body 44 .

When the water flow enters the body 1 from the water inlet 10, the water flow will push the gasket 28 (as shown in Figure 3), so that it will move up and push the big spring 23 to compress, so that the water flow can smoothly flow into the body 1 from the water inlet 10 and flow from the water outlet 11 flow out.

When there is low pressure water pressure at the water outlet 11, the water flow will push the coupling column 29 to move outward to the water inlet 10, forcing the small spring 24 to be slightly compressed, and at this time the water stop ring 26 will change from the original location at the thick cylinder 292. To the thin cylinder 293 , since there is a gap between the interior of the water stop ring 26 and the thin cylinder 293 , the water can flow back through the gap, as shown in FIG. 4 and FIG. 5 .

When there is high-pressure water pressure at the water outlet 11 end, the water flow will still force the coupling column 29 to move outward toward the water inlet 10 end, but because the pressure of the water pressure is much greater than the elastic force of the small spring 24, the lock body 22 will be pushed And the cover is closed on the top of the stop ring 25, so that the lock body 22 and the stop ring 25 are almost closed. At this time, the water cannot continue to flow back to the end of the water inlet 10, and the water flow will turn to the branch pipe 12 and push the spring. 43 is compressed, so that the plug body 41 and the stopper 42 move outward, and the plug body 41 will no longer be closed. At this time, the water flow can flow to the pressure relief pipe 13 through the branch pipe 12 to discharge; until the water pressure in the pipe is less than the elastic force of the spring 43 Only then will the pressure relief be automatically stopped.

It can be seen that, in the utility model, when the water pressure at the water outlet 11 end is slightly greater than the small spring 24 but less than the spring 43, the water flow will use the gap between the coupling column 29 and the water stop ring 26 to flow back to the water inlet 10 end to release the pressure; and When the water pressure at the water outlet 11 end is greater than the small spring 24 and also greater than the spring 43, the water pressure will be released by the pressure relief pipe 13 ends;

To sum up, the structural device of the utility model, the reverse check pressure relief valve with the function of backflow and pressure relief, has a significant improvement effect, can indeed improve utility and safety, and is full of creativity, novelty and practicability, so a patent is filed according to law Application; In addition, although the utility model has been disclosed as above with a preferred embodiment, it is not used to limit the utility model. Therefore, all equivalent replacements made according to the technical solution of the utility model should be included in the utility model. within the protection scope of technical solutions.

Claims (1)

1. the check pressure-relief valve structure device of a tool backflow release of pressure function is in the body [1] of T font, is provided with a non-return device [2] and pressure relief device [4], wherein:

This body [1] has water inlet [10], water outlet [11] and an arm [12], and this arm [12] is provided with a relief tube [13] again again;

Pressure relief device [4] is in order to being installed in the arm [12], and it includes cock body [41], block [42], spring [43] and sealed body [44];

It is characterized in that:

This non-return device [2], be water outlet [11] the end inner edge place that is installed in body [1], include screw [20], binding block [21], lock body [22], big spring [23], little spring [24], baffle ring [25], water stop ring [26], base ring [27], packing ring [28] and column [29] etc.; Wherein:

Screw [20], bottom are provided with external screw thread [201];

Binding block [21] can be in order to screw lock in water outlet [11] end place, and its central authorities are provided with perforation [210], and this perforation [210] can be passed by screw [20];

Lock body [22], central authorities are provided with the perforation [221] of a tool internal screw thread, and this perforation [221] can be sealed by the external screw thread of screw [20] [201], and this lock body [22] bottom is provided with a projection [222];

Big spring [23] is located between binding block [21] and base ring [27];

Little spring [24] is located between lock body [22] and baffle ring [25], and its top merges projection [222] location that utilizes lock body [22];

Baffle ring [25], section is the U font, and central authorities are provided with a perforation [251];

Water stop ring [26], central authorities are provided with perforation [261];

Base ring [27], top can limit water stop ring [26], and central authorities are provided with perforation [271];

Packing ring [28], central authorities are provided with perforation [281];

Column [29], top have internal screw thread [291], and its cylinder includes the thick cylinder [292] of bottom, and the buttress shaft body [293] that is positioned at thick cylinder [292] top.

Images