A high temperature resistant pneumatic valve

Abstract

The utility model provides a high temperature resistant pneumatic valve, comprising: a valve body, a valve core, a front cover, and a rear cover; the front cover is provided with a first chamber on the side facing the valve body, the valve body is provided with a second chamber, a third chamber, and a fourth chamber in sequence starting from the front cover side, and the rear cover is provided with a fifth chamber on the side facing the valve body; the front cover is provided with an NC port connected to the first chamber; the rear cover is provided with an air inlet connected to the fifth chamber; the side wall of the valve body is provided with a COM port connected to the second chamber and an NO port connected to the third chamber; the valve core includes a first section, a second section, a third section, a fourth section, a fifth section, and a sixth section in sequence starting from the side facing the front cover. The high temperature resistant pneumatic valve of the utility model has shown remarkable beneficial effects in improving the temperature resistance level, strengthening the sealing effect, optimizing the medium control, switching, and enhancing the structural stability through its innovative design, and provides an efficient and reliable pneumatic control solution for high temperature industrial environments.

Description

Technical Field

[0001] The utility model relates to the technical field of valve equipment, in particular to a high-temperature resistant pneumatic valve. Background Art

[0002] As an important component in the automation control system, pneumatic valves are widely used in various industrial fields that require precise control of gas flow. In high-temperature environments, such as in specific processes in the metallurgical and chemical industries, higher requirements are placed on the heat resistance of pneumatic valves. Traditional pneumatic valve designs are often unable to withstand extreme temperature conditions, resulting in reduced sealing performance and shortened service life, which in turn affects the stability and safety of the system.

[0003] Deficiencies of existing technology:

[0004] 1. Insufficient sealing performance: In some existing high-temperature pneumatic valve designs, medium leakage is prone to occur due to the simple sealing structure or limited temperature resistance of the sealing material. Especially under high temperature conditions, the sealing ring is prone to aging and deformation, which reduces the sealing reliability of the valve.

[0005] 2. Material limitations: Many existing pneumatic valve components do not use fully high-temperature resistant materials, especially in key components such as valve body, valve core, front cover, and rear cover. The insufficient temperature resistance of materials such as plastics limits their application under high-temperature conditions.

[0006] Therefore, the prior art has deficiencies and needs further improvement. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a high temperature resistant pneumatic valve.

[0008] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0009] The utility model provides a high temperature resistant pneumatic valve, comprising:

[0010] Valve body, valve core, front cover, rear cover;

[0011] The front cover and the rear cover are respectively located on two sides of the valve body, and the valve core is inserted into the valve body;

[0012] The front cover is provided with a first chamber on the side facing the valve body, the inside of the valve body is provided with a second chamber, a third chamber, and a fourth chamber in sequence starting from the front cover side, and the rear cover is provided with a fifth chamber on the side facing the valve body;

[0013] The first chamber is communicated with the second chamber, and the fifth chamber is communicated with the fourth chamber;

[0014] The front cover is provided with an NC port communicating with the first chamber;

[0015] The rear cover is provided with an air inlet communicating with the fifth chamber;

[0016] The side wall of the valve body is provided with a COM port communicating with the second chamber and a NO port communicating with the third chamber;

[0017] The valve core includes a first section, a second section, a third section, a fourth section, a fifth section, and a sixth section in sequence from the side facing the front cover;

[0018] A second sealing ring is provided on the first section, a third sealing ring is provided on the third section, a fourth sealing ring is provided on the fourth section, and a fifth sealing ring is provided on the sixth section;

[0019] The fourth sealing ring is elastically in contact with the side wall of the third chamber for sealing;

[0020] The fifth sealing ring is elastically in contact with the side wall of the fourth chamber for sealing;

[0021] The fifth section is sleeved with a spring, which is located in the fourth chamber;

[0022] The diameters of the two ends of the second chamber are larger than the diameter in the middle, the first section is located in the second chamber, and the second sealing ring and the third sealing ring are respectively located on both sides of the second chamber;

[0023] The diameter of the second section is smaller than the diameter of the second chamber;

[0024] When compressed gas is introduced into the air inlet, the valve core is pushed to move toward the side of the front cover, the spring is compressed, the third sealing ring elastically contacts the right side of the second chamber, the NO port is cut off from the COM port, and the NC port is connected to the COM port;

[0025] When no compressed gas is introduced into the air inlet, the spring is released, the valve core is pushed by the spring to move toward the side of the rear cover, the second sealing ring elastically abuts against the left side of the second chamber, the NO port is connected to the COM port, and the NC port is blocked from the COM port.

[0026] Furthermore, when the whole is assembled, the air inlet is not ventilated, and the first chamber and the second chamber are separated by the second sealing ring. When the air inlet is ventilated, the first chamber and the second chamber are blocked by the second sealing ring, and the third chamber and the fourth chamber are separated by the fifth sealing ring.

[0027] Furthermore, when the spring is removed, a second air inlet is opened in the fourth chamber, and compressed air is introduced, the valve core moves to the right.

[0028] Furthermore, the valve body, valve core, front cover and rear cover are made of high temperature resistant metal material or high temperature resistant plastic material.

[0029] Furthermore, a first annular groove is provided on a side of the front cover facing the valve body, and a first sealing ring is provided in the first annular groove for sealing between the front cover and the valve body.

[0030] Furthermore, a second annular groove is provided on a side of the rear cover facing the valve body, and a sixth sealing ring is provided in the second annular groove for sealing between the rear cover and the valve body.

[0031] Furthermore, the diameter of the fourth chamber is greater than the diameter of the third chamber, and the diameter of the third chamber is greater than the diameter of the second chamber.

[0032] Furthermore, the diameters of the first section and the third section are both greater than the diameter of the second section.

[0033] The technical solution of the utility model has the following beneficial effects:

[0034] 1. Significantly improve high temperature adaptability: By using high temperature resistant metal materials to manufacture the valve body, valve core, front cover and back cover, the structural stability and long-term operation reliability of the entire valve in high temperature environment are ensured, and its application range is broadened, especially in high temperature industrial fields such as petrochemicals, metallurgy, etc.

[0035] 2. Enhanced sealing performance: The design uses multi-stage sealing rings (second to fifth sealing rings) and the first and sixth sealing rings on the front and rear covers, which effectively improves the sealing effect of the valve and prevents media leakage. It also ensures the durability of the seal under high temperature and high pressure conditions, reduces maintenance requirements, and improves work efficiency.

[0036] 3. Optimized medium flow control: The carefully designed chamber structure and valve core segmentation, combined with the difference in diameters of different segments, achieve precise control of the medium flow direction; in particular, the arrangement of the fourth sealing ring effectively isolates the contact between the medium and the spring area, protects the spring from medium corrosion and high temperature damage, and extends the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional diagram of the utility model;

[0038] Figure 2 It is an exploded view of the utility model;

[0039] Figure 3 It is an exploded view of the utility model from another perspective;

[0040] Figure 4 It is a cross-sectional view of the utility model when the air inlet is not introduced with high-pressure gas;

[0041] Figure 5 It is a cross-sectional view of the utility model in which the air inlet is fed with high-pressure gas;

[0042] Figure 6 It is a cross-sectional view of the front cover, valve body and rear cover of the utility model;

[0043] Figure 7 It is a cross-sectional view of the valve core of the utility model.

[0044] In the figure:

[0045] 1. Front cover;

[0046] 101, first chamber; 102, NC port;

[0047] 103. first annular groove; 104. first sealing ring;

[0048] 2. Valve body;

[0049] 201, second chamber; 202, third chamber; 203, fourth chamber;

[0050] 204, COM port; 205, NO port;

[0051] 3. Back cover;

[0052] 301, fifth chamber; 302, air inlet;

[0053] 303, second annular groove; 304, sixth sealing ring;

[0054] 4. Valve core;

[0055] 401, first paragraph; 402, second paragraph; 403, third paragraph; 404, fourth paragraph; 405, fifth paragraph; 406, sixth paragraph;

[0056] 407, second sealing ring; 408, third sealing ring; 409, fourth sealing ring; 410, fifth sealing ring; 411, spring. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0058] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] In the description of this embodiment, the terms "upper", "lower", "front", "back", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0061] Combination Figure 1-Figure 7 As shown, the utility model provides a high temperature resistant pneumatic valve, comprising:

[0062] Front cover 1, valve body 2, rear cover 3, valve core 4;

[0063] The front cover 1 and the rear cover 3 are respectively located on both sides of the valve body 2, and the valve core 4 is inserted into the valve body 2;

[0064] The front cover 1 is provided with a first chamber 101 on the side facing the valve body 2, the valve body 2 is provided with a second chamber 201, a third chamber 202, and a fourth chamber 203 in sequence starting from the front cover 1, and the rear cover 3 is provided with a fifth chamber 301 on the side facing the valve body 2;

[0065] The first chamber 101 is communicated with the second chamber 201, and the fifth chamber 301 is communicated with the fourth chamber 203;

[0066] The front cover 1 is provided with an NC port 102 communicating with the first chamber 101;

[0067] The rear cover 3 is provided with an air inlet 302 communicating with the fifth chamber 301;

[0068] The side wall of the valve body 2 is provided with a COM port 204 communicating with the second chamber 201 and a NO port 205 communicating with the third chamber 202;

[0069] The valve core 4 includes, starting from the side facing the front cover 1, a first section 401, a second section 402, a third section 403, a fourth section 404, a fifth section 405, and a sixth section 406;

[0070] The first section 401 is provided with a second sealing ring 407 , the third section 403 is provided with a third sealing ring 408 , the fourth section 404 is provided with a fourth sealing ring 409 , and the sixth section 406 is provided with a fifth sealing ring 410 ;

[0071] The fourth sealing ring 409 elastically abuts against the side wall of the third chamber 202 for sealing;

[0072] The fifth sealing ring 410 elastically abuts against the side wall of the fourth chamber 203 for sealing;

[0073] A spring 411 is sleeved on the fifth section 405, and the spring 411 is located in the fourth chamber 203;

[0074] The diameters of the two ends of the second chamber 201 are larger than the diameter in the middle. The first section 401 is located in the second chamber 201. The second sealing ring 407 and the third sealing ring 408 are located on both sides of the second chamber 201 respectively.

[0075] The diameter of the second section 402 is smaller than the diameter of the second chamber 201;

[0076] When compressed gas is introduced into the air inlet 302, the valve core 4 is pushed to move toward the side of the front cover 1, the spring 411 is compressed, the third sealing ring 408 elastically contacts the right side of the second chamber 201, the NO port 205 is cut off from the COM port 204, and the NC port 102 is connected to the COM port 204;

[0077] When no compressed gas is introduced into the air inlet 302 , the spring 411 is released, and the valve core 4 is pushed by the spring 411 to move toward the side of the rear cover 3 , and the second sealing ring 407 elastically abuts against the left side of the second chamber 201 , the NO port 205 is connected to the COM port 204 , and the NC port 102 is blocked from the COM port 204 .

[0078] When the whole is assembled, the air inlet 302 is not ventilated, and the first chamber 101 and the second chamber 201 are separated by the second sealing ring 407. When the air inlet 302 is ventilated, the first chamber 101 and the second chamber 201 are blocked by the second sealing ring 407, and the third chamber 202 and the fourth chamber 203 are separated by the fifth sealing ring 410.

[0079] When the spring 411 is removed, a second air inlet is opened in the fourth chamber 203, and compressed air is introduced, the valve core 4 moves to the right.

[0080] The valve body 2 , valve core 4 , front cover 1 , and rear cover 3 are made of high-temperature resistant metal material or high-temperature resistant plastic material.

[0081] A first annular groove 103 is disposed on a side of the front cover 1 facing the valve body 2 . A first sealing ring 104 is disposed in the first annular groove 103 for sealing between the front cover 1 and the valve body 2 .

[0082] A second annular groove 303 is disposed on the side of the rear cover 3 facing the valve body 2 . A sixth sealing ring 304 is disposed in the second annular groove 303 for sealing between the rear cover 3 and the valve body 2 .

[0083] The diameter of the fourth chamber 203 is greater than the diameter of the third chamber 202 , and the diameter of the third chamber 202 is greater than the diameter of the second chamber 201 .

[0084] The diameters of the first section 401 and the third section 403 are both greater than the diameter of the second section 402 .

[0085] The principle of this utility model is as follows:

[0086] The pneumatic valve is mainly composed of valve body 2, valve core 4, front cover 1, rear cover 3 and other components. The valve core 4 is movable in the valve body 2, and the front and rear covers 3 respectively close the two ends of the valve body 2, and together with the valve body 2 form multiple chambers: the first to fifth chambers 301. There is a specific connection relationship between these chambers, in which the first chamber 101 is connected to the second chamber 201, and the fifth chamber 301 is connected to the fourth chamber 203. The NC port 102 on the front cover 1 is connected to the first chamber 101, and the air inlet 302 on the rear cover 3 is connected to the fifth chamber 301. The side of the valve body 2 is provided with a COM port 204 communicating with the second chamber 201 and a NO port 205 communicating with the third chamber 202.

[0087] The valve core 4 is designed as a six-section structure, and each section is equipped with a sealing ring to ensure isolation between different chambers. Specifically, the first section 401 is provided with a second sealing ring 407, the third section 403 is equipped with a third sealing ring 408, the fourth section 404 is equipped with a fourth sealing ring 409, and the sixth section 406 is provided with a fifth sealing ring 410. Among them, the fourth and fifth sealing rings 410 respectively ensure the sealing of the third chamber 202 and the fourth chamber 203, prevent the leakage of the medium and protect the spring 411 located in the fourth chamber 203.

[0088] The operating mechanism of the pneumatic valve is based on air pressure drive: when compressed gas is input into the air inlet 302, the valve core 4 is pushed to move toward the front cover 1, and the spring 411 is compressed accordingly, and the third sealing ring 408 contacts and closes with the right side of the second chamber 201, resulting in the NO port 205 to the COM port 204 being closed, and the NC port 102 to the COM port 204 being open, thus achieving a conductive state. On the contrary, if there is no gas input into the air inlet 302, the spring 411 returns to its original state, pushing the valve core 4 to move backwards, at which time the second sealing ring 407 contacts with the left side of the second chamber 201, the NO port 205 to the COM port 204 is open, and the NC port 102 to the COM port 204 is closed, thus forming another conductive state.

[0089] In addition, in order to improve the temperature resistance and sealing performance, the valve body 2 and its components (including the valve core 4, the front cover 1, and the rear cover 3) are made of high-temperature resistant metal materials or high-temperature resistant plastic materials. The front cover 1 and the rear cover 3 are also respectively provided with the first and second annular grooves 303, and the first and sixth sealing rings 304 are built-in to enhance the sealing between the valve body 2. The diameter of the fourth chamber 203 is larger than that of the third chamber 202, which is larger than that of the second chamber 201. Such a design is conducive to pressure control and sealing effect. The diameters of the first section 401 and the third section 403 are larger than those of the second section 402, which matches the special shape of the chamber, optimizes the arrangement and function of the sealing ring, and in particular, the fourth sealing ring 409 effectively prevents the medium from penetrating into the area where the spring 411 is located, ensuring that the pneumatic valve works stably and reliably in a high temperature environment.

[0090] The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the protection scope of the present invention.

Claims

1. A high temperature resistant pneumatic valve, characterized in that: include: Valve body, valve core, front cover, rear cover; The front cover and the rear cover are respectively located on two sides of the valve body, and the valve core is inserted into the valve body; The front cover is provided with a first chamber on the side facing the valve body, the inside of the valve body is provided with a second chamber, a third chamber, and a fourth chamber in sequence starting from the front cover side, and the rear cover is provided with a fifth chamber on the side facing the valve body; The first chamber is communicated with the second chamber, and the fifth chamber is communicated with the fourth chamber; The front cover is provided with an NC port communicating with the first chamber; The rear cover is provided with an air inlet communicating with the fifth chamber; The side wall of the valve body is provided with a COM port communicating with the second chamber and a NO port communicating with the third chamber; The valve core includes a first section, a second section, a third section, a fourth section, a fifth section, and a sixth section in sequence from the side facing the front cover; A second sealing ring is provided on the first section, a third sealing ring is provided on the third section, a fourth sealing ring is provided on the fourth section, and a fifth sealing ring is provided on the sixth section; The fourth sealing ring is elastically in contact with the side wall of the third chamber for sealing; The fifth sealing ring is elastically in contact with the side wall of the fourth chamber for sealing; The fifth section is sleeved with a spring, which is located in the fourth chamber; The diameters of the two ends of the second chamber are larger than the diameter in the middle, the first section is located in the second chamber, and the second sealing ring and the third sealing ring are respectively located on both sides of the second chamber; The diameter of the second section is smaller than the diameter of the second chamber; When compressed gas is introduced into the air inlet, the valve core is pushed to move toward the side of the front cover, the spring is compressed, the third sealing ring elastically contacts the right side of the second chamber, the NO port is cut off from the COM port, and the NC port is connected to the COM port; When no compressed gas is introduced into the air inlet, the spring is released, the valve core is pushed by the spring to move toward the side of the rear cover, the second sealing ring elastically abuts against the left side of the second chamber, the NO port is connected to the COM port, and the NC port is blocked from the COM port.

2. The high temperature resistant pneumatic valve according to claim 1, characterized in that: When the whole is assembled, the air inlet is not ventilated, and the first chamber and the second chamber are separated by the second sealing ring. When the air inlet is ventilated, the first chamber and the second chamber are blocked by the second sealing ring, and the third chamber and the fourth chamber are separated by the fifth sealing ring.

3. The high temperature resistant pneumatic valve according to claim 1, characterized in that: When the spring is removed, a second air inlet is opened in the fourth chamber, and compressed air is introduced, the valve core moves to the right.

4. The high temperature resistant pneumatic valve according to claim 1, characterized in that: The valve body, valve core, front cover and rear cover are made of high temperature resistant metal material or high temperature resistant plastic material.

5. The high temperature resistant pneumatic valve according to claim 1, characterized in that: A first annular groove is arranged on the side of the front cover facing the valve body, and a first sealing ring is arranged in the first annular groove for sealing between the front cover and the valve body.

6. The high temperature resistant pneumatic valve according to claim 1, characterized in that: A second annular groove is arranged on the side of the rear cover facing the valve body, and a sixth sealing ring is arranged in the second annular groove for sealing between the rear cover and the valve body.

7. The high temperature resistant pneumatic valve according to claim 1, characterized in that: The diameter of the fourth chamber is greater than the diameter of the third chamber, and the diameter of the third chamber is greater than the diameter of the second chamber.

8. The high temperature resistant pneumatic valve according to claim 1, characterized in that: The diameters of the first section and the third section are both larger than the diameter of the second section.

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