Automatic drain valve of intercooler of engine

Abstract

The utility model relates to an automatic drain valve of an engine intercooler. The automatic drain valve of the intercooler of the engine comprises a valve body, a mounting seat, a valve core and an elastic piece, during use, one end of the valve body is fixed to an air channel of an engine, it is guaranteed that the first port is communicated with the air channel, and when the engine is in a working state, the valve element overcomes elastic force provided by the elastic piece under the action of air pressure in the air channel to move in the direction from the first port to the second port till the valve head closes the valve port. The leakproofness of the air passage of the engine in a working state is ensured; when the engine suddenly stops, the air pressure in the air channel is suddenly reduced, at the moment, the valve element slides in the direction from the second port to the first port under the action of the elastic force provided by the elastic piece till the valve head leaves the valve port, and at the moment, condensate water formed in the air channel due to the sudden stop of the engine can be discharged through the first cavity, the valve port and the second cavity in sequence. And the probability that the condensed water is sucked into the cylinder body when the engine is started next time is reduced, so that the service life of the engine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of drain valves, in particular to an automatic drain valve for an engine intercooler. Background Art

[0002] When the engine is working, in order to avoid the occurrence of over-high working temperature, an intercooler formed by water-air cooling is often used to cool the intake air. During the working process of the engine, even if the intake air is cooled by the intercooler, the temperature in the air passage is still higher than the normal temperature. Therefore, when the engine suddenly stops working, the temperature in the air passage will drop rapidly. At this time, the water vapor in the gas staying in the air passage will be quickly cooled to form condensed water, and will be sucked into the cylinder block when the engine is started next time, thus causing damage to the engine cylinder block and affecting the service life of the engine. Content of the Utility Model

[0003] Based on this, it is necessary to provide an automatic drain valve for an engine intercooler that can reduce the probability of damage to the engine caused by the condensed water in the air passage entering the engine cylinder block.

[0004] An automatic drain valve for an engine intercooler includes:

[0005] A valve body having opposite first and second ports; a first chamber communicating with the first port, a second chamber communicating with the second port, and a valve port communicating the first chamber and the second chamber are provided in the valve body; the first port is used to communicate with the air passage of the engine;

[0006] A mounting seat is arranged in the second chamber; the mounting seat has a sliding hole and a water passage;

[0007] A valve core includes a valve stem and a valve head arranged at one end of the valve stem; the valve head is located in the first chamber; the valve stem is slidably inserted through the sliding hole; the valve stem can be operatively slid along the direction from the first port to the second port relative to the mounting seat to drive the valve head to close the valve port;

[0008] An elastic member is used to provide an elastic force that drives the valve stem to slide along the direction from the second port to the first port to drive the valve head away from the valve port.

[0009] In one embodiment, the valve body includes a first cylinder body, a second cylinder body, and a third cylinder body connected in sequence; the inner diameter of the first cylinder body is greater than the inner diameter of the third cylinder body; the inner diameter of the second cylinder body gradually decreases in the direction from the first port to the second port; a valve port is formed at the connection between the second cylinder body and the third cylinder body; the valve head has an annular inclined side surface; the diameter of the inclined side surface gradually decreases in the direction from the first port to the second port; the inclination angle of the inclined side surface is the same as the inclination angle of the inner wall of the second cylinder body; when the valve head closes the valve port, the inclined side surface abuts against the inner wall of the second cylinder body.

[0010] In one embodiment, the inner diameter of the first cylinder body is the same as the inner diameter of the edge of the second cylinder body facing the first port; the inner diameter of the third cylinder body is the same as the inner diameter of the edge of the second cylinder body facing the first port.

[0011] In one embodiment, the valve body includes a first cylinder body, a second cylinder body, and a third cylinder body connected in sequence; the inner diameter of the first cylinder body is greater than the inner diameter of the third cylinder body; the second cylinder body is an annular plate-like structure perpendicular to the direction from the first port to the second port; a valve port is formed at the connection between the second cylinder body and the third cylinder body; the valve head has a mating plane facing the second port; when the valve head closes the valve port, the mating plane abuts against the plate surface of the second cylinder body facing the first port.

[0012] In one embodiment, an installation portion is provided along the circumferential direction on the outer wall of the valve body at the end where the first port is provided.

[0013] In one embodiment, the mounting seat includes a sliding portion and a plurality of fixing portions arranged at intervals along the circumferential direction of the valve body; both ends of each fixing portion are respectively connected to the sliding portion and the inner wall of the second chamber; a water passage is formed between two adjacent fixing portions; a sliding hole is formed on the sliding portion.

[0014] In one embodiment, a guide cylinder is provided along the circumferential direction of the valve head; the inner wall of the guide cylinder is spaced from the valve stem; the end of the guide cylinder away from the valve head is slidably sleeved on the sliding portion.

[0015] In one embodiment, the elastic member is a compression spring; the compression spring is sleeved on the valve stem and clamped between the valve head and the sliding portion.

[0016] In one of the embodiments, it further includes a limiting structure detachably mounted on an end of the valve stem away from the valve head; when the valve head leaves the valve port to open the valve port, the limiting structure abuts against an end surface of the mounting seat away from the first port.

[0017] In one of the embodiments, the end of the valve stem away from the valve head has an external thread; the limiting structure is a locking nut; the locking nut is sleeved on the valve stem and cooperates with the external thread.

[0018] When the above-mentioned engine intercooler automatic drain valve is in use, one end of the valve body provided with the first port is fixed on the air duct of the engine, and the first port is ensured to be connected with the air duct. When the engine is in a working state, the temperature in the air duct is high and the air pressure is large. At this time, the valve core overcomes the elastic force provided by the elastic member under the action of the air pressure in the air duct and moves in the direction from the first port to the second port until the valve head closes the valve port, thereby ensuring the airtightness of the engine air duct when it is in a working state; when the engine suddenly stops, the air pressure in the air duct drops sharply. At this time, the valve core slides in the direction from the second port to the first port under the action of the elastic force provided by the elastic member until the valve head leaves the valve port to connect the first chamber and the second chamber. At this time, the condensed water formed in the air duct due to the sudden shutdown of the engine will be discharged through the first chamber, the valve port and the second chamber in sequence, thereby realizing the automatic drainage function, so as to reduce the probability of the condensed water being sucked into the cylinder body when the engine is started next time, thereby helping to extend the service life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of an automatic drain valve of an engine intercooler in a preferred embodiment of the utility model;

[0020] Figure 2 for Figure 1 A cross-sectional view of a valve body in an automatic drain valve of an engine intercooler shown;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the mounting seat in the automatic drain valve of the engine intercooler is shown.

[0022] Explanation of reference numerals: 100, automatic drain valve for engine intercooler; 110, valve body; 111, first port; 112, second port; 113, first chamber; 114, second chamber; 115, valve port; 116, first cylinder; 117, second cylinder; 118, third cylinder; 119, mounting portion; 120, mounting seat; 121, sliding hole; 122, water passage; 123, sliding portion; 124, fixing portion; 130, valve core; 131, valve stem; 132, valve head; 1321, inclined side; 133, guide cylinder; 140, elastic member; 150, limiting structure. DETAILED DESCRIPTION

[0023] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant accompanying drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can also be an intermediate element. It can also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements or there can also be one or more intermediate elements.

[0026] In the case of using "comprising", "having", and "including" described herein, unless explicit limiting terms are used, such as "only", "consisting of", etc., another component can also be added. Unless otherwise mentioned, terms in the singular form can include the plural form and should not be construed as having a quantity of one.

[0027] In addition, the accompanying drawings are not drawn to a scale of 1:1, and the relative dimensions of the components are only drawn by way of example in the drawings and not necessarily to the true scale.

[0028] Figure 1 This is the structure of the automatic drain valve of the engine intercooler in an embodiment of the present utility model. For ease of illustration, the accompanying drawings only show the structures related to the embodiments of the present utility model.

[0029] Please refer to Figure 1 , the automatic drain valve 100 of the engine intercooler in the preferred embodiment of the present utility model includes a valve body 110, a mounting seat 120, a valve core 130, and an elastic member 140.

[0030] Please refer to together Figure 2 and Figure 3, the valve body 110 has opposite first port 111 and second port 112. Inside the valve body 110, there is a first chamber 113 communicating with the first port 111, a second chamber 114 communicating with the second port 112, and a valve port 115 communicating the first chamber 113 and the second chamber 114. The first port 111 is used to communicate with the air passage of the engine.

[0031] The mounting seat 120 is arranged in the second chamber 114. The mounting seat 120 has a sliding hole 121 and a water passing channel 122. Specifically, the depth direction of the sliding hole 121 is the same as the direction from the first port 111 to the second port 112. The two ends of the water passing channel 122 are respectively located on the end face of the mounting seat 120 facing the first port 111 and the end face of the mounting seat 120 facing the second port 112.

[0032] The valve core 130 includes a valve stem 131 and a valve head 132 arranged at one end of the valve stem 131. The valve head 132 is located in the first chamber 113. The valve stem 131 is slidably inserted into the sliding hole 121. The valve stem 131 can be operatively slid along the direction from the first port 111 to the second port 112 relative to the mounting seat 120 to drive the valve head 132 to close the valve port 115.

[0033] The elastic member 140 is used to provide an elastic force that drives the valve stem 131 to slide along the direction from the second port 112 to the first port 111, so as to drive the valve head 132 away from the valve port 115. Among them, the elastic member 140 can be, but is not limited to, a spring, an elastic metal sheet, an elastic rubber block, etc.

[0034] During use, the end of the valve body 110 provided with the first port 111 is fixed on the air passage of the engine, and it is ensured that the first port 111 communicates with the air passage to realize the installation of the engine intercooler automatic drain valve 100 on the air passage. At this time, the first port 111 and the second port 112 are respectively located at the upper end and the lower end of the valve body 110. Therefore, the direction from the first port 111 to the second port 112 is the top-down direction, and the direction from the second port 112 to the first port 111 is the bottom-up direction.

[0035] When the engine is in the working state, the temperature in the air passage is relatively high and the air pressure is relatively large. At this time, the valve core 130 moves downward under the action of the air pressure in the air passage, overcoming the elastic force provided by the elastic member 140, until the valve head 132 closes the valve port 115. At this time, the engine intercooler automatic drain valve 100 is in the closed state, which can ensure the airtightness of the engine air passage during the working state;

[0036] When the engine suddenly stops, the air pressure in the air passage drops sharply. At this time, the valve core 130 moves upward under the elastic force provided by the elastic member 140 until the valve head 132 leaves the valve port 115 to conduct the first chamber 113 and the second chamber 114. At this time, the condensed water formed in the air passage due to the sudden stop of the engine will be discharged successively through the first chamber 113, the valve port 115 and the second chamber 114, realizing the automatic drainage function, so as to reduce the probability that the engine will inhale the condensed water into the cylinder block during the next start-up and cause engine damage, and thus the service life of the engine can be extended.

[0037] In one embodiment of the present utility model, the valve body 110 includes a first cylinder 116, a second cylinder 117 and a third cylinder 118 connected in sequence. The inner diameter of the first cylinder 116 is larger than the inner diameter of the third cylinder 118. The inner diameter of the second cylinder 117 gradually decreases along the direction from the first port 111 to the second port 112. A valve port 115 is formed at the connection between the second cylinder 117 and the third cylinder 118. The valve head 132 has an annular inclined side 1321. The diameter of the inclined side 1321 gradually decreases along the direction from the first port 111 to the second port 112. The inclination angle of the inclined side 1321 is the same as the inclination angle of the inner wall of the second cylinder 117. When the valve head 132 closes the valve port 115, the inclined side 1321 abuts against the inner wall of the second cylinder 117.

[0038] In this way, one end of the first cylinder 116 far from the second cylinder 117 is communicated with the first port 111, one end of the third cylinder 118 far from the second cylinder 117 is communicated with the second port 112, and the internal space of the first cylinder 116 and the internal space of the second cylinder 117 together constitute the first chamber 113, and the internal space of the third cylinder 118 serves as the second chamber 114.

[0039] When the automatic drainage valve 100 of the engine intercooler is in the closed state, the inclined side 1321 of the valve head 132 abuts against the inner wall of the second cylinder 117, so that the valve head 132 is in effective contact with the inner wall of the second cylinder 117 while closing the valve port 115, thereby increasing the contact area between the valve head 132 and the inner wall of the valve body 110, so as to improve the sealing effect between the valve head 132 and the inner wall of the valve body 110 when the automatic drainage valve 100 of the engine intercooler is in the closed state, and thus the airtight reliability of the air passage under the working state of the engine can be improved.

[0040] Specifically, the inner diameter of the first cylinder body 116 is the same as the inner diameter of the second cylinder body 117 at the edge of the end facing the first port 111. The inner diameter of the third cylinder body 118 is the same as the inner diameter of the second cylinder body 117 at the edge of the end facing the first port 111. In this way, no step is formed on the inner wall at the connection between the first cylinder body 116 and the second cylinder body 117 and between the second cylinder body 117 and the third cylinder body 118, reducing the probability that condensed water is stuck at the connection between the first cylinder body 116 and the second cylinder body 117 or at the connection between the second cylinder body 117 and the third cylinder body 118, further reducing the probability that the condensed water is sucked into the cylinder block when the engine is started next time, causing engine damage, and further prolonging the service life of the engine.

[0041] In another embodiment of the present utility model, the valve body 110 includes a fourth cylinder body (not shown in the figure), a fifth cylinder body (not shown in the figure), and a sixth cylinder body (not shown in the figure) connected in sequence. The inner diameter of the fourth cylinder body is larger than the inner diameter of the sixth cylinder body. The fifth cylinder body is an annular plate-like structure perpendicular to the direction from the first port 111 to the second port 112. A valve port 115 is formed at the connection between the fifth cylinder body and the sixth cylinder body. The valve head 132 has a mating plane facing the second port 112. When the valve head 132 closes the valve port 115, the mating plane abuts against the plate surface of the fifth cylinder body facing the first port 111.

[0042] In this way, when the engine intercooler automatic drain valve 100 is installed on the air passage of the engine, the fifth cylinder body is a horizontally arranged annular plate-like structure, the mating plane is a horizontal plane mating with the fifth cylinder body, one end of the fourth cylinder body far from the fifth cylinder body is communicated with the first port 111, one end of the sixth cylinder body far from the fifth cylinder body is communicated with the second port 112, and the internal space of the fourth cylinder body serves as the first chamber 113, and the internal space of the sixth cylinder body serves as the second chamber 114.

[0043] When the above-mentioned engine intercooler automatic drain valve 100 is in the closed state, the mating plane of the valve head 132 abuts against the upper surface of the fifth cylinder body, so that the valve head 132 is in effective contact with the fifth cylinder body while closing the valve port 115, thereby increasing the contact area between the valve head 132 and the inner wall of the valve body 110, so as to improve the sealing effect between the valve head 132 and the inner wall of the valve body 110 when the engine intercooler automatic drain valve 100 is in the closed state, and thus improving the airtight reliability of the air passage under the working state of the engine.

[0044] In some embodiments, an installation portion 119 is provided on the outer wall of the valve body 110 at one end of the first port 111 along the circumferential direction. When the engine intercooler automatic drain valve 100 is installed, the installation portion 119 is detachably connected to the water passage of the engine, so as to detachably install the valve body 110 on the water passage of the engine. Therefore, the provision of the installation portion 119 makes the installation of the engine intercooler automatic drain valve 100 on the engine water passage more convenient.

[0045] In some embodiments, the mounting base 120 includes a sliding portion 123 and a plurality of fixing portions 124 arranged at intervals along the circumferential direction of the valve body 110. Both ends of each fixing portion 124 are respectively connected to the sliding portion 123 and the inner wall of the second chamber 114. A water passage 122 is formed between two adjacent fixing portions 124. A sliding hole 121 is formed in the sliding portion 123. Specifically, the sliding hole 121 is coaxially arranged with the valve port 115. Of course, in other embodiments, the sliding hole 121 may also be non-concentric with the valve port 115, as long as it can ensure that the valve head 132 can close or open the valve port 115 when the valve stem 131 slides in the sliding hole 121.

[0046] In this way, the sliding portion 123 is stably fixed in the second chamber 114 through a plurality of fixing portions 124, and a water passage 122 is formed between two adjacent fixing portions 124, ensuring that the water entering from the valve port 115 can smoothly pass through the mounting portion 119 while improving the connection stability of the sliding portion 123 in the valve body 110.

[0047] Further, in some embodiments, a guiding cylinder 133 is arranged along the circumferential direction of the valve head 132. The inner wall of the guiding cylinder 133 is spaced from the valve stem 131. One end of the guiding cylinder 133 away from the valve head 132 is slidably sleeved on the sliding portion 123.

[0048] In this way, when the valve core 130 moves downward or upward, the valve stem 131 slides in the same direction in the sliding hole 121, and at the same time, the guiding cylinder 133 also slides in the same direction outside the sliding portion 123, so as to ensure that the valve core 130 can move more stably during the opening and closing processes of the valve port 115, improving the operation stability of the automatic drain valve 100 of the engine intercooler.

[0049] Further, in some embodiments, the elastic member 140 is a compression spring. The compression spring is sleeved on the valve stem 131 and clamped between the valve head 132 and the sliding portion 123. With such a design, the valve head 132 can move upward stably, and further make the opening operation of the valve port 115 more effective and reliable.

[0050] Specifically, when the guiding cylinder 133 is arranged along the circumferential direction of the valve head 132, one end of the compression spring is located in the gap between the guiding cylinder 133 and the valve stem 131 to ensure that the compression process structure of the compression spring is more stable, and further make the downward movement of the valve head 132 more stable, ensuring that the closing operation of the valve port 115 is more effective and reliable.

[0051] In some embodiments, the engine charge air cooler automatic drain valve 100 further includes a limit structure 150 detachably mounted at one end of the valve stem 131 away from the valve head 132. When the valve head 132 moves away from the valve port 115 to open the valve port 115, the limit structure 150 abuts against the end face of the mounting seat 120 facing away from the first port 111. Among them, the limit structure 150 can be, but is not limited to, a nut, a limit block, a laterally mounted pin, etc.

[0052] In this way, when the valve core 130 moves upward under the elastic force provided by the elastic member 140 to open the valve port 115, the limit structure 150 abuts against the surface of the mounting seat 120 facing the second port 112, so as to limit the upward movement position of the valve core 130, avoid the situation that the valve core 130 moves upward excessively and thus disengages from the sliding hole 121, and improve the structural stability of the engine charge air cooler automatic drain valve 100.

[0053] Furthermore, in some embodiments, one end of the valve stem 131 away from the valve head 132 has an external thread (not shown in the figure). The limit structure 150 is a locking nut. The locking nut is sleeved on the valve stem 131 and cooperates with the external thread. When the valve core 130 is installed, the valve stem 131 passes through the sliding hole 121 from one end of the mounting seat 120 facing the first port 111 and is screwed with the locking nut. Therefore, when disassembling and assembling the valve core 130, only the locking nut needs to be turned, which is convenient and fast.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0055] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. An automatic drain valve for an engine intercooler, characterized in that: include: A valve body having a first port and a second port opposite to each other; the valve body has a first chamber communicating with the first port, a second chamber communicating with the second port, and a valve port communicating with the first chamber and the second chamber; the first port is used to communicate with the air passage of the engine; A mounting seat, disposed in the second chamber; the mounting seat has a sliding hole and a water passage; The valve core comprises a valve stem and a valve head disposed at one end of the valve stem; the valve head is located in the first chamber; the valve stem is slidably disposed in the sliding hole; the valve stem is operable to slide relative to the mounting seat in a direction from the first port to the second port, so as to drive the valve head to close the valve port; The elastic member is used to provide an elastic force to drive the valve stem to slide in a direction from the second port to the first port, so as to drive the valve head to leave the valve port.

2. The engine intercooler automatic drain valve according to claim 1, characterized in that: The valve body includes a first cylinder, a second cylinder and a third cylinder connected in sequence; the inner diameter of the first cylinder is larger than the inner diameter of the third cylinder; the inner diameter of the second cylinder gradually decreases in the direction from the first port to the second port; the valve port is formed at the connection between the second cylinder and the third cylinder; the valve head has an annular inclined side surface; the diameter of the inclined side surface gradually decreases in the direction from the first port to the second port; the inclination angle of the inclined side surface is consistent with the inclination angle of the inner wall of the second cylinder; when the valve head closes the valve port, the inclined side surface abuts against the inner wall of the second cylinder.

3. The engine intercooler automatic drain valve according to claim 2, characterized in that: The inner diameter of the first cylinder is the same as the inner diameter of the edge of the second cylinder facing the first port; the inner diameter of the third cylinder is the same as the inner diameter of the edge of the second cylinder facing the first port.

4. The engine intercooler automatic drain valve according to claim 1, characterized in that: The valve body includes a first cylinder, a second cylinder and a third cylinder connected in sequence; the inner diameter of the first cylinder is larger than the inner diameter of the third cylinder; the second cylinder is an annular plate structure perpendicular to the first port and pointing in the direction of the second port; the connection between the second cylinder and the third cylinder forms the valve port; the valve head has a mating plane facing the second port; when the valve head closes the valve port, the mating plane abuts against the plate surface of the second cylinder facing the first port.

5. The engine intercooler automatic drain valve according to claim 1, characterized in that: The outer wall of the valve body at one end of which the first port is provided is provided with a mounting portion along the circumferential direction.

6. The engine intercooler automatic drain valve according to claim 1, characterized in that: The mounting seat includes a sliding portion and a plurality of fixed portions spaced apart along the circumference of the valve body; the two ends of each fixed portion are respectively connected to the sliding portion and the inner wall of the second chamber; the water passage is formed between two adjacent fixed portions; and the sliding hole is provided on the sliding portion.

7. The engine intercooler automatic drain valve according to claim 6, characterized in that: The valve head is provided with a guide cylinder along the circumferential direction; the inner wall of the guide cylinder is spaced apart from the valve stem; and one end of the guide cylinder away from the valve head is slidably sleeved on the sliding part.

8. The automatic drain valve for an engine intercooler according to claim 6, characterized in that: The elastic member is a compression spring; the compression spring is sleeved on the valve stem and clamped between the valve head and the sliding part.

9. The engine intercooler automatic drain valve according to claim 1, characterized in that: It also includes a limiting structure detachably mounted on one end of the valve stem away from the valve head; when the valve head leaves the valve port to open the valve port, the limiting structure abuts against the end surface of the mounting seat away from the first port.

10. The engine intercooler automatic drain valve according to claim 9, characterized in that: The end of the valve stem away from the valve head has an external thread; the limiting structure is a locking nut; the locking nut is sleeved on the valve stem and matched with the external thread.

Images