Safety combination valve

Abstract

This utility model belongs to the field of safety valve technology, and particularly relates to a safety combination valve, including a valve body and an opening and closing mechanism. The opening and closing mechanism includes: a fixed valve seat, installed on one end of the valve body, and having a liquid flow channel inside; a first control component, including a first valve core seat and a valve core rod, the first valve core seat being used to control the opening and closing of the liquid flow channel, and the valve core rod being movably disposed within the first valve core seat and having a gas flow channel inside; a second control component, including a second valve core seat and a first steel ball, the second valve core seat being movably disposed between the first valve core seat and the valve core rod, and the first steel ball being movably disposed between the second valve core seat and the first valve core seat; and a reset component for moving and resetting the first valve core seat. The beneficial effects of this utility model are that when overpressure occurs, the liquid pushes the first valve core seat upward, the liquid flow channel opens, and the liquid is discharged to achieve pressure relief protection; when no overpressure occurs but the air pressure in the hydraulic chamber of the reciprocating diaphragm pump is too high, it plays a role in venting.

Description

Technical Field

[0001] This utility model belongs to the field of pressure relief valve technology, and in particular relates to a safety combination valve. Background Technology

[0002] A safety valve is a special device used for overpressure protection in pressure systems; it is an automatic valve. When the system pressure reaches the set pressure, it discharges a certain rated amount of fluid without any external force, relying instead on the force of the medium itself to prevent the system pressure from exceeding the predetermined safety value. When the pressure returns to normal, the valve will close again to prevent the medium from continuing to flow out.

[0003] Currently, safety valves installed on reciprocating diaphragm pumps typically only function as drainage valves. When the liquid pressure exceeds the limit, the drainage safety valve handles the leakage. However, even when the liquid pressure does not reach the overpressure state, gas can still evaporate from the liquid and accumulate at the top of the high-pressure chamber, forming a compressible gas bladder that obstructs diaphragm formation. Since the safety valve cannot release the gas, an additional venting safety valve is often required on the diaphragm pump to release the accumulated gas. This significantly increases production costs, occupies more space, and is inconvenient for the installation of reciprocating diaphragm pumps. Utility Model Content

[0004] The purpose of this utility model is to provide a safety combination valve to address the aforementioned technical problems.

[0005] In view of this, the present invention provides a safety combination valve, including a valve body and an opening and closing mechanism, the opening and closing mechanism including: A fixed valve seat is installed on one end of the valve body and has a liquid flow channel inside. The first control component includes a first valve core seat and a valve core rod. The first valve core seat is movably disposed in a fixed valve seat for controlling the opening and closing of the liquid flow channel. The valve core rod is movably disposed in the first valve core seat and has a gas flow channel inside it. The gas flow channel and the liquid flow channel are connected. The second control component includes a second valve core seat and a first steel ball. The second valve core seat is movably disposed between the first valve core seat and the valve core rod, and the first steel ball is movably disposed between the second valve core seat and the first valve core seat, for controlling the connection between the gas flow channel and the liquid flow channel. A reset assembly is telescopically and movably disposed within the valve body for resetting the first valve core seat.

[0006] Furthermore, a second steel ball is provided on the valve core rod, which is located at the end of the valve core rod away from the second valve core seat, and is used to block the gas flow channel.

[0007] Furthermore, the reset component includes: A guide sleeve is movably disposed within the valve body, with one end abutting against the valve seat; A spring is sleeved on a guide sleeve and axially abuts against the guide sleeve and the valve body.

[0008] Furthermore, the valve body is also equipped with an adjustment component, which abuts against the spring to adjust the spring's preload.

[0009] Furthermore, the adjustment components include: The adjusting bolt is threaded onto the valve body and is used to abut against the spring. Locking nut, which is installed on adjusting bolt, is used to lock and fix the adjusting bolt to the valve body.

[0010] Furthermore, the adjusting bolt is hollow inside, and the end of the guide sleeve is inserted into the adjusting bolt.

[0011] Furthermore, a positioning groove is provided inside the guide sleeve, and the valve core rod is located inside the positioning groove.

[0012] The beneficial effects of this utility model are: When this safety combination valve is in use, in the event of overpressure, the liquid pushes the first valve core seat upward, opening the liquid flow channel and allowing the liquid to be discharged to achieve pressure relief protection. In the event that there is no overpressure but the air pressure in the hydraulic chamber of the reciprocating diaphragm pump is too high, it can also play a role in venting, effectively improving the safety of use and making it highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; The markings in the diagram are as follows: 1. Valve body; 2. Fixed valve seat; 3. First valve core seat; 4. Valve core rod; 5. Second valve core seat; 6. First steel ball; 7. Second steel ball; 8. Liquid flow channel; 9. Gas flow channel; 10. Guide sleeve; 11. Spring; 12. Adjusting bolt; 13. Locking nut; 14. Plug; 15. Positioning groove; 16. First vent hole; 17. Second vent hole; 18. Third vent hole. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0016] Example 1: This embodiment provides a safety combination valve, including a valve body 1 and an opening and closing mechanism, the opening and closing mechanism including: Fixed valve seat 2 is installed on one end of valve body 1 and has a liquid flow channel 8 inside; The first control component includes a first valve core seat 3 and a valve core rod 4. The first valve core seat 3 is movably disposed in the fixed valve seat 2 for controlling the opening and closing of the liquid flow channel 8. The valve core rod 4 is movably disposed in the first valve core seat 3 and has a gas flow channel 9 inside. The gas flow channel 9 and the liquid flow channel 8 are connected. The second control component includes a second valve core seat 5 and a first steel ball 6. The second valve core seat 5 is movably disposed between the first valve core seat 3 and the valve core rod 4, and the first steel ball 6 is movably disposed between the second valve core seat 5 and the first valve core seat 3, for controlling the connection between the gas flow channel 9 and the liquid flow channel 8. A reset assembly is retractably and movably disposed within the valve body 1 for resetting the first valve core seat 3.

[0017] In this technical solution, the safety combination valve is installed on the hydraulic end of a reciprocating diaphragm pump. The valve body 1 is hollow inside. A fixed valve seat 2 is installed on one end of the valve body 1, and the fixed valve seat 2 has an inlet and an outlet that communicate with the internal liquid flow channel 8. The inlet is located on the axial end of the fixed valve seat 2, and the outlet is located on the circumferential side of the fixed valve seat 2. A first valve core seat 3 that can move axially is provided inside the fixed valve seat 2. A valve core rod 4 is provided inside the first valve core seat 3. A gas flow channel 9 is provided inside the valve core rod 4, and the gas flow channel 9 communicates with the inlet.

[0018] A movable second valve core seat 5 and a first steel ball 6 are installed between the gas flow channel 9 and the liquid inlet. The second valve core seat 5 has a through hole for communicating with the gas flow channel 9 and the liquid inlet, and the first steel ball 6 is located between the through hole and the liquid inlet.

[0019] In the event of overpressure, when the liquid pressure exceeds the preload of the reset component, the safety combination valve activates. The liquid pushes up the first valve core seat 3, causing it to rise and open the liquid flow channel 8. Simultaneously, the reset component is compressed, allowing the liquid and gas inside the hydraulic chamber at the hydraulic end of the reciprocating diaphragm pump to be discharged through the liquid flow channel 8, thus achieving pressure relief. After the pressure relief operation is completed, the elastic restoring force of the reset component pushes the first valve core seat 3 down to its initial position, closing the liquid flow channel 8.

[0020] When no overpressure occurs, if the gas pressure in the hydraulic chamber of the reciprocating diaphragm pump's hydraulic end is greater than the external gas pressure, the gas will first lift the first steel ball 6. The first steel ball 6 will then lift the second valve core seat 5 together. The second valve core seat 5 and the first steel ball 6 will move upward between the valve core rod 4 and the first valve core seat 3, creating a gap between the periphery of the first steel ball 6 and the valve core rod 4 to allow gas to flow. After the gas flows to the periphery of the first steel ball 6, the gas pressure is no longer sufficient to push the first steel ball 6 and the second valve core seat 5 upward together. At this time, the first steel ball 6 falls back and separates from the second valve core seat 5. Then, the gas flows into the gas channel through the through hole of the second valve core seat 5, and then flows into the liquid channel 8 from the gas flow channel 9 to be discharged, thus achieving the venting function. This effectively prevents the reciprocating diaphragm pump from being affected by excessive internal gas pressure during normal operation.

[0021] In addition, the first steel ball 6 and the second valve core seat 5 can also provide a one-way sealing effect, which can effectively prevent external air from flowing into the reciprocating diaphragm pump through the safety combination valve.

[0022] In summary, when this safety combination valve is in use, in the event of overpressure, the liquid pushes the first valve core seat 3 upward, opening the liquid flow channel 8, which can discharge the liquid to achieve pressure relief protection; when there is no overpressure but the air pressure in the hydraulic chamber of the reciprocating diaphragm pump is too high, it can also play a role in venting, effectively improving the safety of use and making it highly practical.

[0023] Example 2: This embodiment provides a safety combination valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0024] Furthermore, a second steel ball 7 is provided on the valve core rod 4. The second steel ball 7 is located on the end of the valve core rod 4 away from the second valve core seat 5 and is used to block the gas flow channel 9.

[0025] In this technical solution, the second valve core seat 5 and the first steel ball 6 are disposed on one end of the gas flow channel 9 on the valve core rod 4, while the second steel ball 7 is disposed on the other end of the gas flow channel 9 on the valve core rod 4. Through this structural design, a one-way sealing effect is achieved on the other end of the gas flow channel 9, further restricting the air flowing from the outside into the gas flow channel 9, and effectively preventing air from flowing into the reciprocating diaphragm pump.

[0026] Example 3: This embodiment provides a safety combination valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0027] Furthermore, the reset component includes: Guide sleeve 10 is movably disposed inside valve body 1, and one end abuts against valve seat; Spring 11 is sleeved on guide sleeve 10 and axially abuts against guide sleeve 10 and valve body 1.

[0028] In this technical solution, the reset assembly consists of a guide sleeve 10 and a spring 11. One end of the guide sleeve 10 is connected to the first valve core seat 3 and can move with the movement of the first valve core seat 3. The spring 11 is sleeved on the guide sleeve 10 and its two ends abut against the guide sleeve 10 and the valve body 1, respectively. When the first valve core seat 3 is lifted by hydraulic pressure, the liquid flow channel 8 opens, the spring 11 is compressed, and an elastic restoring force is generated. After the pressure relief operation is completed, the spring 11 returns to its original state and pushes the guide sleeve 10 down, driving the first valve core seat 3 back to its initial position, realizing the movement reset of the first valve core seat 3, and closing the liquid flow channel 8.

[0029] Example 4: This embodiment provides a safety combination valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0030] Furthermore, the valve body 1 is also provided with an adjustment component, which abuts against the spring 11 and is used to adjust the preload of the spring 11.

[0031] Furthermore, the adjustment components include: Adjusting bolt 12 is threaded onto valve body 1 and is used to abut against spring 11. Locking nut 13 is installed on adjusting bolt 12 and is used to lock adjusting bolt 12 onto valve body 1.

[0032] In this technical solution, the locking nut 13 is threaded onto the outside of the adjusting bolt 12, and an internal thread structure is provided on the inner side of the end of the valve body 1. The tail of the adjusting bolt 12 is threaded into the valve body 1, and the tail of the adjusting bolt 12 abuts against the spring 11. By adjusting the amount of threaded connection between the adjusting bolt 12 and the valve body 1, the compression of the spring 11 in the valve body 1 is controlled and changed, thereby realizing the adjustment and change of the preload of the spring 11.

[0033] Example 5: This embodiment provides a safety combination valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0034] Furthermore, the adjusting bolt 12 is hollow inside, and the end of the guide sleeve 10 is inserted into the adjusting bolt 12.

[0035] In this technical solution, the adjusting bolt 12 is hollow inside, and its tail end is inserted into the guide sleeve 10. A screw plug 14 is installed on the top of the adjusting bolt 12 for sealing. Through this structural design, the guide sleeve 10 is guided to move, enhancing the stability of the guide sleeve 10's movement, making the extension and retraction of the spring 11 more stable, thereby effectively enhancing the pressure relief stability.

[0036] Example 6: This embodiment provides a safety combination valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0037] Furthermore, a positioning groove 15 is provided inside the guide sleeve 10, and the valve core rod 4 is located inside the positioning groove 15.

[0038] In this technical solution, by setting a positioning groove 15 on the guide sleeve 10, and the guide sleeve 10 being sleeved on the valve core rod 4 through the positioning groove 15 and abutting against the first valve core seat 3, and the valve core rod 4 being set inside the first valve core seat 3, the abutment stability between the guide sleeve 10 and the first valve core seat 3 is enhanced through this structural design, effectively preventing the guide sleeve 10 from shifting, so that the movement of the first valve core seat 3 can drive the valve core rod 4 and the guide sleeve 10 to move stably.

[0039] It is worth noting that a first vent hole 16 is provided on the guide sleeve 10, which connects the positioning groove 15 and the interior of the guide sleeve 10. A second vent hole 17 is provided on the tail of the adjusting bolt 12, and a third vent hole 18 is provided on the fixed valve seat 2. When the safety combination valve is performing venting operations, the specific flow path of the gas is as follows: it first flows through the gas channel 9, then enters the guide sleeve 10 through the first vent hole 16, then enters the adjusting bolt 12 through the guide sleeve 10, then enters the valve body 1 through the second vent hole 17, and finally enters the liquid outlet of the liquid channel 8 from the valve body 1 through the third vent hole 18 to achieve discharge.

[0040] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A safety combination valve comprising a valve body (1) and an opening and closing mechanism, characterized in that, The opening and closing mechanism includes: Fixed valve seat (2), the fixed valve seat (2) is installed on one end of valve body (1), and a liquid flow channel (8) is opened inside; The first control component includes a first valve core seat (3) and a valve core rod (4). The first valve core seat (3) is movably disposed in a fixed valve seat (2) for controlling the opening and closing of the liquid flow channel (8). The valve core rod (4) is movably disposed in the first valve core seat (3) and has a gas flow channel (9) inside. The gas flow channel (9) and the liquid flow channel (8) are connected. The second control component includes a second valve core seat (5) and a first steel ball (6). The second valve core seat (5) is movably disposed between the first valve core seat (3) and the valve core rod (4). The first steel ball (6) is movably disposed between the second valve core seat (5) and the first valve core seat (3) for controlling the connection between the gas flow channel (9) and the liquid flow channel (8). A reset assembly is provided in the valve body (1) for retractable and movable reset of the first valve core seat (3).

2. A safety combination valve according to claim 1, characterised in that The valve core rod (4) is also provided with a second steel ball (7), which is located at the end of the valve core rod (4) away from the second valve core seat (5) and is used to block the gas flow channel (9).

3. A safety combination valve according to claim 1, wherein The reset component includes: Guide sleeve (10), the guide sleeve (10) is movably disposed inside the valve body (1), and one end abuts against the valve seat; Spring (11) is sleeved on guide sleeve (10) and axially abuts against guide sleeve (10) and valve body (1).

4. A safety combination valve according to claim 3, wherein The valve body (1) is also provided with an adjustment component, which abuts against the spring (11) and is used to adjust the preload of the spring (11).

5. A safety combination valve according to claim 4, wherein The adjustment component includes: Adjusting bolt (12), which is threaded onto valve body (1) and used to abut against spring (11); Locking nut (13), which is installed on adjusting bolt (12), is used to lock adjusting bolt (12) on valve body (1).

6. A safety combination valve according to claim 5, wherein The adjusting bolt (12) is hollow inside, and the end of the guide sleeve (10) is inserted into the adjusting bolt (12).

7. A safety combination valve according to claim 6, wherein The guide sleeve (10) is provided with a positioning groove (15), and the valve core rod (4) is located in the positioning groove (15).

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