Pressure relief and check integrated valve

Abstract

The utility model discloses a pressure relief and check integrated valve, and relates to the related technical field of valve bodies. The check valve comprises a valve body, a check valve part and a safety relief valve part, the check valve part comprises a first valve deck, a first sealing piston and a first spring, a conveying channel is arranged in the valve body, a water inlet is formed in the lower portion of the valve body, a first piston bin is arranged on the left side of the valve body, and a first sealing piston is placed in the first piston bin. A first spring is connected between the right side of the first sealing piston and the inner side of the first piston bin in an abutting mode, a first valve deck is buckled to the left side of the valve body, a one-way valve air inlet is formed in the first valve deck, and the safety relief valve part comprises a second valve deck, a second sealing piston and a second spring. The upper portion of the second sealing piston abuts against the inner wall of the second piston bin, a second valve deck is connected to the lower portion of the second piston bin in a buckled mode, a second spring abuts against the lower portion of the second sealing piston and the interior of the second valve deck, and a pressure relief outlet is formed in the second valve deck. The structure reduces installation steps.

Description

Technical Field

[0001] The utility model belongs to the relevant technical field of valve bodies, and particularly relates to a pressure relief and non-return integrated valve. Background Art

[0002] The definition of "valve" is a device used to control the direction, pressure and flow of fluid in a fluid system. A valve is a device that allows the medium (liquid, gas, powder) in pipes and equipment to flow or stop and control its flow. The valve body is a major component of the valve, which can be divided into pressure relief valves, check valves, etc. according to its function.

[0003] The pressure relief valve is used to automatically open and release pressure when the pressure in the equipment or pipeline exceeds the set pressure of the pressure relief valve, ensuring that the pressure of the medium in the equipment and pipeline is below the set pressure, protecting the equipment and pipeline and preventing accidents. The function of the check valve is to prevent the medium from flowing back, prevent the pump and drive motor from reversing, and avoid releasing the medium in the container. In addition, the main operation of the check valve is to open and close the valve disc by the flow of the medium to prevent the medium from flowing back.

[0004] In the water system, it is necessary to have both the function of preventing backflow and the function of pressure relief, so there is no need to have both a pressure relief valve and a check valve. However, the existing pressure relief valve and check valve are installed separately in the water system. Therefore, during the installation of the water system, it is necessary to install one valve body first, and then install the other valve body, which leads to the problem of inconvenient installation, so it needs to be improved. Utility Model Content

[0005] The utility model aims to provide an integrated pressure relief and check valve, which solves the problem that the existing pressure relief valve and the check valve are both separately installed in a water system, resulting in inconvenient installation.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a pressure relief and non-return integrated valve, comprising a valve body, a non-return valve part is arranged on the left side of the valve body, a safety pressure relief valve part is arranged at the lower right side of the valve body, the non-return valve part comprises a valve cover 1, a sealing piston 1 and a spring 1, a conveying channel connected from left to right is arranged in the valve body, a water inlet connected with the conveying channel is arranged at the lower side of the valve body, a piston chamber 1 connected with the conveying channel is arranged on the left side of the valve body, a sealing piston 1 is horizontally placed in the piston chamber 1, a spring 1 is top-connected between the right side of the sealing piston 1 and the inner side of the piston chamber 1, the valve cover 1 is buckled on the left side of the valve body, and the valve A one-way valve air inlet is provided in the cover one, and the one-way valve air inlet can be connected with the piston chamber one when the sealing piston one moves to the left. The safety pressure relief valve part includes a valve cover two, a sealing piston two and a spring two. A piston chamber two connected with the conveying channel is provided at the right bottom of the valve body. The sealing piston two is vertically placed in the piston chamber two and abuts against the inner wall of the piston chamber two above the sealing piston two. The valve cover two is buckled on the outer side of the lower side of the piston chamber two, and the spring two abuts against the inner side of the valve cover two below the sealing piston two. A pressure relief outlet is provided in the valve cover two, and the pressure relief outlet can be connected with the conveying channel when the sealing piston two moves downward.

[0008] Preferably, in order to improve the sealing performance, a sealing groove 1 is provided on the inner side of the valve cover 1, a sealing ring 1 is provided in the sealing groove 1, and one end face of the sealing ring 1 abuts against the end face of the left side of the valve body.

[0009] Preferably, in order to facilitate fixation, an annular buckle is provided on the left side of the valve body, and a groove for buckling with the annular buckle is provided on the inner side of the valve cover.

[0010] Preferably, in order to facilitate fixation, an annular buckle 2 is provided on the outer side below the piston chamber 2, and a groove 2 for buckling with the annular buckle 2 is provided on the inner side of the valve cover 2.

[0011] Preferably, in order to improve the sealing performance, a sealing groove 2 is provided on the inner side of the valve cover 2, a sealing ring 2 is provided in the sealing groove 2, and one end face of the sealing ring 2 abuts against the end face below the piston chamber 2.

[0012] Preferably, in order to facilitate fixation, a limiting platform 1 is provided on the inner side of the valve cover 2, the lower end of the spring 2 is sleeved outside the limiting platform 1, and a limiting platform 2 is provided below the sealing piston 2, the upper end of the spring 2 is sleeved outside the limiting platform 2.

[0013] Preferably, in order to facilitate fixation, a limiting platform three is provided on the inner side of the piston chamber one, the right side of the spring one is sleeved outside the limiting platform three, a limiting platform four is provided on the right side of the sealing piston one, and the left end of the spring one is sleeved outside the limiting platform four.

[0014] The utility model has the following beneficial effects: the structure plays a check valve role (i.e., the one-way valve works at the air inlet) and a safety pressure relief role in the water system. The structure integrates the check valve part and the safety pressure relief valve part into a valve body of a three-way joint, thereby ultimately saving space, simplifying installation, and reducing the cost of pipeline connection and the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereoscopic diagram of a pressure relief and non-return integrated valve in Example 1;

[0016] Figure 2 This is a schematic structural diagram of a pressure relief and non-return integrated valve in Example 1 when valve cover 1 and valve cover 2 are separated from other components;

[0017] Figure 3 It is a cross-sectional schematic diagram of a pressure relief and non-return integrated valve in Example 1;

[0018] Figure 4 for Figure 2 A magnified image of point A;

[0019] Figure 5 for Figure 2 Enlarged view of point B.

[0020] Figure numerals: valve body 1, delivery channel 101, piston chamber 1 102, piston chamber 2 103, output connector 104, water inlet 105, check valve part 2, valve cover 1 201, sealing piston 1 202, spring 1 203, one-way valve air inlet 2011, safety pressure relief valve part 3, valve cover 2 301, sealing piston 2 302, spring 2 303, pressure relief outlet 3011, annular buckle 1 4, groove 1 5, annular buckle 2 6, groove 2 7, sealing groove 2 8, sealing ring 2 9, limit platform 1 10, limit platform 2 11, limit platform 3 12, limit platform 4 13, sealing groove 1 14, sealing ring 1 15. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1-5As shown, a pressure relief and check integrated valve disclosed in this embodiment includes a valve body 1, a check valve part 2 is arranged on the left side of the valve body 1, and a safety pressure relief valve part 3 is arranged at the lower right side of the valve body 1, the check valve part 2 includes a valve cover 201, a sealing piston 202 and a spring 203, a delivery channel 101 connected from left to right is arranged in the valve body 1, a water inlet 105 connected to the delivery channel 101 is arranged at the lower side of the valve body 1, a piston bin 102 connected to the delivery channel 101 is arranged on the left side of the valve body 1, the sealing piston 202 is horizontally placed in the piston bin 102, the spring 203 is connected between the right side of the sealing piston 202 and the inner side of the piston bin 102, the valve cover 201 is buckled on the left side of the valve body 1, and a one-way valve air inlet 2011 is arranged in the valve cover 201, and the sealing piston 202 moves to the left After that, the one-way valve air inlet 2011 can be communicated with the piston chamber 102. The safety pressure relief valve part 3 includes a valve cover 2 301, a sealing piston 2 302 and a spring 2 303. A piston chamber 2 103 communicating with the delivery channel 101 is arranged at the bottom of the right side of the valve body 1. The sealing piston 2 302 is vertically placed in the piston chamber 2 103, and abuts against the inner wall of the piston chamber 2 103 above the sealing piston 2 302. The outer side of the lower side of the piston chamber 103 is buckled with the valve cover 2 301. The lower side of the sealing piston 2 302 abuts against the inside of the valve cover 2 301 with the spring 2 303. A pressure relief outlet 3011 is arranged in the valve cover 2 301. After the sealing piston 2 302 moves downward, the pressure relief outlet 3011 can be communicated with the delivery channel 101. An output connector 104 connected to a heating boiler or a nozzle is arranged on the right side of the valve body 1, and the output connector 104 is communicated with the inside of the delivery channel 101.

[0024] Preferably, in order to improve the sealing performance, a sealing groove 14 is provided on the inner side of the valve cover 201, a sealing ring 15 is provided in the sealing groove 14, one end face of the sealing ring 15 abuts against the end face of the left side of the valve body 1, a sealing groove 8 is provided on the inner side of the valve cover 301, a sealing ring 29 is provided in the sealing groove 8, one end face of the sealing ring 29 abuts against the end face below the piston chamber 2 103. In the above structure, a sealing ring 15 is provided between the valve cover 201 and the left side of the valve body 1, and a sealing ring 15 is provided between the piston chamber 2 103 and the valve cover 301 to further improve the overall sealing effect.

[0025] Preferably, in order to facilitate fixation, an annular buckle 14 is provided on the left side of the valve body 1, a groove 15 connected to the annular buckle 14 is provided on the inner side of the valve cover 201, an annular buckle 26 is provided on the outer side below the piston chamber 103, a groove 27 connected to the annular buckle 26 is provided on the inner side of the valve cover 301, a limiting platform 10 is provided on the inner side of the valve cover 301, the lower end of the spring 303 is sleeved on the outside of the limiting platform 10, a limiting platform 11 is provided below the sealing piston 302, and the upper end of the spring 303 is sleeved on the limiting platform 2 11, a limiting platform three 12 is arranged on the inner side of the piston chamber one 102, the right side of the spring one 203 is sleeved on the outside of the limiting platform three 12, and a limiting platform four 13 is arranged on the right side of the sealing piston one 202, and the left end of the spring one 203 is sleeved on the outside of the limiting platform four 13. The arrangement of the above structure can fix the spring one 203 and the spring two 303 to prevent them from moving left and right at will and affecting the sealing effect of the sealing piston. At the same time, the valve body 1 and the valve cover one 201, as well as the piston chamber one 102 and the valve cover two 301 are all connected by snap-fit ​​connections, which are convenient for later disassembly and installation.

[0026] The specific working principle of this structure is as follows: during operation, liquid enters from the water inlet 105, and the pressure in the water circuit increases. At this time, the sealing piston 2 302 of the check valve is compressed and in a closed state, which can protect the components on the left side of the check valve. When air is needed, the air pressure can push open the sealing piston 1 202 inside the check valve part 2 on the left side to increase air pressure in the system; when the water circuit system has an abnormal pressure rise that exceeds the set safety pressure, the sealing piston 2 302 in the safety pressure relief valve part 3 is pushed open to activate the pressure relief function. Therefore, this structure plays a check (i.e., the one-way valve air inlet 2011 works) and safety pressure relief role in the water circuit system. This structure integrates the check valve part 2 and the safety pressure relief valve part 3 into a valve body 1 of a three-way joint, which ultimately saves space, simplifies installation, and reduces the cost of pipeline connection and the risk of leakage.

[0027] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A pressure relief and check valve, comprising a valve body (1), characterized in that: A check valve portion (2) is provided on the left side of the valve body (1), and a safety pressure relief valve portion (3) is provided at the lower right side of the valve body (1). The check valve portion (2) comprises a valve cover (201), a sealing piston (202) and a spring (203). A conveying channel (101) connected from left to right is provided in the valve body (1). A water inlet (105) connected to the conveying channel (101) is provided at the lower side of the valve body (1). ) is provided on the left side thereof with a piston chamber (102) connected to the delivery channel (101), the sealing piston (202) is horizontally placed in the piston chamber (102), the spring (203) is connected between the right side of the sealing piston (202) and the inner side of the piston chamber (102), the valve cover (201) is buckled on the left side of the valve body (1), and the valve cover (201) is provided with a one-way valve air inlet (2011), the sealing When the sealing piston 1 (202) moves to the left, the one-way valve air inlet (2011) can be connected to the piston chamber 1 (102). The safety pressure relief valve part (3) includes a valve cover 2 (301), a sealing piston 2 (302) and a spring 2 (303). A piston chamber 2 (103) connected to the delivery channel (101) is arranged at the bottom right of the valve body (1). The sealing piston 2 (302) is vertically placed in the piston chamber 2 (103). The upper part of the sealing piston (302) abuts against the inner wall of the piston chamber (103); the lower outer side of the piston chamber (103) is buckled with the valve cover (301); the lower part of the sealing piston (302) abuts against the inside of the valve cover (301) with the spring (303); a pressure relief outlet (3011) is provided in the valve cover (301); when the sealing piston (302) moves downward, the pressure relief outlet (3011) can be connected to the conveying channel (101).

2. A pressure relief and check integrated valve according to claim 1, characterized in that: A sealing groove (14) is provided on the inner side of the valve cover (201), and a sealing ring (15) is provided in the sealing groove (14), and one end face of the sealing ring (15) abuts against the end face on the left side of the valve body (1).

3. The integrated pressure relief and check valve according to claim 2, characterized in that: An annular buckle (4) is provided on the left side of the valve body (1), and a clamping groove (5) for clamping the annular buckle (4) is provided on the inner side of the valve cover (201).

4. The integrated pressure relief and check valve according to claim 3, characterized in that: An annular buckle 2 (6) is arranged on the outer side below the second piston chamber (103), and a clamping groove 2 (7) for buckling the annular buckle 2 (6) is arranged on the inner side of the second valve cover (301).

5. The integrated pressure relief and check valve according to claim 4, characterized in that: A sealing groove 2 (8) is provided inside the valve cover 2 (301), and a sealing ring 2 (9) is provided inside the sealing groove 2 (8). One end face of the sealing ring 2 (9) abuts against the end face below the piston chamber 2 (103).

6. The integrated pressure relief and check valve according to claim 5, characterized in that: A limiting platform (10) is arranged on the inner side of the valve cover (301), and the lower end of the spring (303) is sleeved outside the limiting platform (10). A limiting platform (11) is arranged below the sealing piston (302), and the upper end of the spring (303) is sleeved outside the limiting platform (11).

7. The integrated pressure relief and check valve according to claim 6, characterized in that: A limiting platform three (12) is arranged on the inner side of the piston chamber one (102), and the right side of the spring one (203) is sleeved outside the limiting platform three (12). A limiting platform four (13) is arranged on the right side of the sealing piston one (202), and the left end of the spring one (203) is sleeved outside the limiting platform four (13).

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