Vehicle-mounted slow start valve with speed regulation function

Abstract

The utility model discloses a vehicle-mounted slow opening valve with a speed regulation function, which comprises a valve body, a valve cover, a valve seat and a valve rod provided with a through channel, a valve cavity is formed between the valve body and the valve cover, the valve rod is movably arranged in the valve cavity, a balance spring is arranged at the upper end of the valve rod and the upper end of the valve cavity in an abutting mode, and a V-shaped sealing ring is arranged between the valve rod and the inner wall of the valve cavity. The V-shaped sealing ring divides the valve cavity into an upper valve cavity body and a lower valve cavity body, a cavity is formed between the valve body and the valve seat, and the valve body is provided with an air inlet communicated with the cavity, an air outlet communicated with the lower valve cavity body, a first valve port and a second valve port, the balance spring enables the valve rod to always have the movement trend of closing the first valve port, and a speed regulating valve needle used for regulating the gas flow is arranged at the second valve port. And the upper cavity of the valve cavity is communicated with the upper cavity of the valve cavity through the channel of the valve rod. The sealing device is simple and reasonable in structure, low in manufacturing cost, wide in application range, high in sealing performance, long in service life and stable and reliable in working performance.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic components, in particular to a vehicle-mounted slow-opening valve with a speed regulation function. Background Art

[0002] Currently, high-speed trains, buses, and minibuses all use compressed air to control the opening and closing of their doors. However, when the vehicle is first opened, the air compressor pressure is unstable, and hastily opening or closing the doors can easily lead to safety accidents. Therefore, these vehicles are often equipped with a stable start valve. With this valve installed, if the system pressure does not meet the required level, the stable start valve will remain closed, and subsequent actuators will not blindly operate. Only when the pressure reaches the required level will the stable start valve open, and the system will return to normal operation. The stable start valve is a pneumatic component used for pneumatic system safety protection. Its structure can be broken down into the valve body, valve cover, valve seat, and valve core. The specific structure and operating principle of the stable start valve can be found in the Chinese utility model patent (Announcement No.: CN206159538U) that discloses a pneumatically controlled stable start valve.

[0003] However, the common stable start valves currently on the market have complex internal structures and are inconvenient to produce and manufacture. At the same time, the complex internal structure also limits the fine processing of the valve body, and the structural accuracy is difficult to guarantee.

[0004] Therefore it is necessary to improve the existing technology. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of the complex internal structure and inconvenient production and manufacturing of the stable starting valve in the prior art. At the same time, the complex internal structure also limits the fine processing of the valve body and the structural accuracy is difficult to ensure. A vehicle-mounted slow-start valve with a speed regulation function is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] When unclamping said control button, under the effect of the compression spring and the bubble holding vessel internal pressure that shaves, combine closely in the interior edge of valve gap and sealing load chamber, and burble goes out control valve thereby control is shaved.

[0008] Furthermore, the valve seat is provided with a mounting hole for mounting the speed regulating valve needle, and the mounting hole is concentrically arranged with the second valve port.

[0009] Furthermore, the speed regulating valve needle is threadedly engaged with the mounting hole, so that the speed regulating valve needle can move up and down relative to the second valve port, thereby adjusting the gap between the speed regulating valve needle and the second valve port.

[0010] Furthermore, a first sealing ring is provided between the speed regulating valve needle and the mounting hole.

[0011] Furthermore, the top of the speed regulating valve needle has a first conical head portion corresponding to the second valve port.

[0012] Furthermore, the bottom of the speed regulating valve needle has a notch.

[0013] Furthermore, an annular groove for installing a V-shaped sealing ring is provided on the valve stem.

[0014] Furthermore, the V-shaped sealing ring is provided with a V-shaped opening facing downward.

[0015] Furthermore, an annular step is provided at the bottom end of the channel of the valve stem, a guide portion is provided at the upper end of the valve cavity, the upper end of the balance spring is sleeved on the guide portion, and the lower end of the balance spring is abutted against the annular step.

[0016] Furthermore, the valve cover is provided with a sleeve portion extending into the interior of the valve cavity, the guide portion is provided at the top end of the sleeve portion, and a second sealing ring is provided between the upper end of the valve stem and the sleeve portion; the lower end of the valve stem is fixedly provided with a conical sealing ring corresponding to the first valve port.

[0017] After adopting the above structure, the beneficial effects of the utility model are as follows: the vehicle-mounted slow-open valve with a speed regulation function described in the utility model comprises a valve body, a valve cover, a valve seat and a valve stem provided with a through passage, the valve cover and the valve seat are respectively arranged at two ends of the valve body, a valve cavity is formed between the valve body and the valve cover, the valve stem is movably installed in the valve cavity, and a balance spring is abutted against the valve stem and the upper end of the valve cavity, a V-shaped sealing ring is arranged between the valve stem and the inner wall of the valve cavity, the V-shaped sealing ring divides the valve cavity into an upper cavity and a lower cavity, a chamber is formed between the valve body and the valve seat, the valve body is respectively provided with an air inlet communicating with the cavity, an air outlet communicating with the lower cavity of the valve cavity, a first valve port and a second valve port for communicating the cavity with the lower cavity of the valve cavity; the balance spring enables the valve stem to always have a movement tendency to close the first valve port, and a speed regulating valve needle for adjusting the gas flow is arranged at the second valve port; the chamber is communicated with the upper cavity of the valve cavity through the channel of the valve stem. The utility model has the advantages of simple and reasonable structure, low manufacturing cost, wide application range, strong sealing performance, long service life and stable and reliable working performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention, the following will briefly introduce the drawings required for use in the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is an exploded view of the overall structure of the utility model;

[0021] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0022] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at A;

[0023] Figure 5 It is a three-dimensional schematic diagram of the valve stem of the utility model;

[0024] Figure 6 It is a three-dimensional schematic diagram of the speed regulating valve needle of the utility model;

[0025] Figure 7 It is a three-dimensional schematic diagram of the valve seat of the utility model;

[0026] Figure 8 It is a three-dimensional schematic diagram of the valve cover of the present utility model.

[0027] Figures 1 to 8 The winning bid number is:

[0028] 1. Valve body; 11. Air inlet; 12. Air outlet; 13. First valve port; 14. Second valve port; 2. Valve cover; 21. Sleeve; 3. Valve seat; 31. Mounting hole; 4. Valve stem; 41. Channel; 411. Annular step; 42. Annular groove; 43. Second sealing ring; 44. Conical sealing ring; 5. Valve chamber; 51. Upper chamber of valve chamber; 511. Small chamber; 52. Lower chamber of valve chamber; 53. Guide; 6. Balance spring; 7. V-shaped sealing ring; 71. V-shaped opening; 8. Chamber; 9. Speed ​​regulating valve needle; 91. First sealing ring; 92. First cone head; 93. Notch. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] Furthermore, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc., should be understood in a broad sense. For example, they can refer to fixed connection, removable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediary; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0033] In this utility model, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, "above," "above," and "above" a first feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are for illustrative purposes only and do not represent the only embodiment.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] like Figures 1 to 8As shown, a vehicle-mounted slow-opening valve with a speed regulation function includes a valve body 1, a valve cover 2, a valve seat 3, and a valve stem 4 with a through-channel 41. The valve cover 2 and the valve seat 3 are respectively arranged at both ends of the valve body 1. A valve cavity 5 is formed between the valve body 1 and the valve cover 2. The valve stem 4 is movably installed in the valve cavity 5, and a balance spring 6 is provided between the valve stem 4 and the upper end of the valve cavity 5. A V-shaped sealing ring 7 is provided between the valve stem 4 and the inner wall of the valve cavity 5. The V-shaped sealing ring 7 divides the valve cavity 5 into an upper valve cavity 51 and a lower valve cavity 52. A chamber 8 is formed between the valve body 1 and the valve seat 3. The valve body 1 is provided with an air inlet 11 communicating with the chamber 8, an air outlet 12 communicating with the valve lower chamber 52, and a first valve port 13 and a second valve port 14 for connecting the chamber 8 with the valve lower chamber 52. The balancing spring 6 ensures that the valve stem 4 always has a tendency to close the first valve port 13. A speed regulating needle 9 is provided at the second valve port 14 for regulating gas flow. The chamber 8 communicates with the valve upper chamber 51 via a passage 41 in the valve stem 4. The valve stem 4 is provided with an annular groove 42 for mounting a V-ring 7. The V-ring 7 has a V-shaped opening 71 with its opening facing downward.

[0037] Based on the above embodiments, the present invention aims to provide a vehicle-mounted slow-opening valve with a speed regulation function, comprising a valve body 1, a valve cover 2, a valve seat 3 and a valve stem 4 with a through-channel 41, wherein the valve cover 2 and the valve seat 3 are respectively arranged at both ends of the valve body 1, a valve cavity 5 is formed between the valve body 1 and the valve cover 2, the valve stem 4 is movably mounted in the valve cavity 5, and a balancing spring 6 is provided between the valve stem 4 and the upper end of the valve cavity 5, a V-shaped sealing ring 7 is provided between the valve stem 4 and the inner wall of the valve cavity 5, and the V-shaped sealing ring 7 divides the valve cavity 5 into a valve cavity upper cavity 51 and a lower valve cavity 52. ​​A chamber 8 is formed between the valve body 1 and the valve seat 3. The valve body 1 is provided with an air inlet 11 communicating with the chamber 8, an air outlet 12 communicating with the lower valve cavity 52, and a first valve port 13 and a second valve port 14 for communicating between the chamber 8 and the lower valve cavity 52. ​​The balancing spring 6 ensures that the valve stem 4 always has a movement tendency to close the first valve port 13. A speed regulating valve needle 9 is provided at the second valve port 14 for regulating gas flow. The chamber 8 communicates with the upper valve cavity 51 via a channel 41 of the valve stem 4. This utility model has a simple and reasonable structure, low manufacturing cost, a wide range of applications, strong sealing performance, a long service life, and stable and reliable operating performance.

[0038] The working process of the slow-open valve is explained in detail using the slow-open valve as an example. When the vehicle is first started, unstable compressed air enters the valve body 1 through the air inlet 11. Some of the air enters through the second valve port 14 above the speed regulating needle 9 and flows to the air outlet 12 of the valve body 1. Some of the air enters the small chamber 511 of the upper chamber 51 of the valve chamber through the passage 41 of the valve stem 4. Under the combined action of air pressure and the balance spring 6, the valve stem 4 seals the first valve port 13. After a period of accumulation, the air flow in the lower chamber 52 of the valve chamber and the air outlet 12 slowly rises. When the pressure reaches half of the inlet pressure, the V-shaped opening 71 of the V-ring 7, due to its large force-bearing area, causes the pressure in the lower chamber 52 of the valve chamber to overcome the force of the balance spring 6 and the small chamber 511 of the upper chamber 51 of the valve chamber, causing the valve stem 4 to move upward, opening the first valve port 13 and restoring the system air supply. Once the system air supply is restored, the slow-open valve remains open. When the vehicle stops and the system air pressure is exhausted, the valve stem 4 returns to its original position and closes the first valve port 13 under the elastic force of the balance spring 6, and the system is in a safe state again, waiting for a new cycle to begin. Figure 4 As shown, the setting of the speed regulating valve needle 9 makes it easy for customers to fine-tune the air intake flow of the second valve port 14 according to different working conditions, effectively controlling the air intake duration and making the product work more accurately.

[0039] As another preferred embodiment of the present invention, the valve seat 3 is provided with a mounting hole 31 for mounting the speed regulating valve needle 9, and the mounting hole 31 is concentrically arranged with the second valve port 14. The speed regulating valve needle 9 is screwed into the mounting hole 31 so that the speed regulating valve needle 9 can move up and down relative to the second valve port 14, thereby adjusting the gap between the speed regulating valve needle 9 and the second valve port 14. A first sealing ring 91 is provided between the speed regulating valve needle 9 and the mounting hole 31. The top of the speed regulating valve needle 9 has a first conical head 92 corresponding to the second valve port 14. The bottom of the speed regulating valve needle 9 has a notch 93. In this embodiment, as shown in FIG. Figure 4 and Figure 6 As shown, the setting of the mounting hole 31 can realize the quick and accurate installation of the speed regulating valve needle 9, and avoid the speed regulating valve needle 9 from being offset when moving up and down. The speed regulating valve needle 9 is screwed into the mounting hole 31, and the bottom of the speed regulating valve needle 9 has a notch 93. The user inserts the tool into the notch 93 and rotates the speed regulating valve needle 9 to adjust the gap between the speed regulating valve needle 9 and the second valve port 14, thereby adjusting the gas flow through the second valve port 14. The design of the first sealing ring 91 improves the airtightness between the speed regulating valve needle 9 and the mounting hole 31. The design of the first cone head 92 facilitates the adjustment of the gap between the speed regulating valve needle 9 and the second valve port 14.

[0040] As another preferred embodiment of the present invention, the bottom end of the passage 41 of the valve stem 4 is provided with an annular step 411, the upper end of the valve cavity 5 is provided with a guide portion 53, the upper end of the balance spring 6 is sleeved on the guide portion 53, and the lower end of the balance spring 6 is abutted against the annular step 411. In this embodiment, Figure 3 As shown, a guide portion 53 is provided at the upper end of the valve chamber 5, and the balancing spring 6 is positioned by the guide portion 53. The valve stem 4 is provided with a channel 41 that matches the outer circumferential size of the balancing spring 6. One end of the balancing spring 6 is sleeved on the outer circumference of the guide portion 53, and the other end of the balancing spring 6 is abutted against the annular step 411 of the channel 41. Through this arrangement, the balancing spring 6 is prevented from shifting or falling out during the movement of the valve stem 4.

[0041] As another preferred embodiment of the present invention, the valve cover 2 is provided with a sleeve portion 21 extending into the interior of the valve cavity 5, the guide portion 53 is provided at the top of the sleeve portion 21, a second sealing ring 43 is provided between the upper end of the valve stem 4 and the sleeve portion 21; the lower end of the valve stem 4 is fixedly provided with a conical sealing ring 44 corresponding to the first valve port 13. In this embodiment, as Figure 3 and Figure 8 As shown, the provision of the sleeve portion 21 makes the connection between the valve cover 2 and the valve body 1 more stable and reliable. The provision of the second sealing ring 43 improves the sealing between the valve stem 44 and the sleeve portion 21, and at the same time separates the upper cavity 51 of the valve cavity, so that a small chamber 511 is formed between the sleeve portion 21 and the valve stem 4, preventing the gas flowing from the channel 41 from flowing out of the area outside the small chamber 511 formed by the valve stem 4 and the sleeve portion 21, thereby reducing gas consumption. By adopting a soft sealing structure such as a conical sealing ring 44, not only can the sealing effect of the valve stem 4 on the first valve port 13 be effectively improved, so that the sealing performance of the slow-opening valve is better, but also the valve stem 4 and the first valve port 13 are not easily worn during use, thereby effectively extending the service life of the slow-opening valve.

[0042] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A vehicle-mounted slow-opening valve with a speed regulating function, comprising a valve body (1), a valve cover (2), a valve seat (3), and a valve stem (4) provided with a through passage (41), wherein the valve cover (2) and the valve seat (3) are respectively arranged at two ends of the valve body (1), a valve cavity (5) is formed between the valve body (1) and the valve cover (2), the valve stem (4) is movably mounted in the valve cavity (5), and a balancing spring (6) is provided between the upper end of the valve stem (4) and the valve cavity (5), and the valve stem (4) and the upper end of the valve cavity (5) are abutted. The valve stem (4) and the valve seat (3) are characterized in that: A V-shaped sealing ring (7) is provided between the valve stem (4) and the inner wall of the valve cavity (5), and the V-shaped sealing ring (7) divides the valve cavity (5) into an upper valve cavity (51) and a lower valve cavity (52). A chamber (8) is formed between the valve body (1) and the valve seat (3), and the valve body (1) is provided with an air inlet (11) communicating with the chamber (8), an air outlet (12) communicating with the lower valve cavity (52), a first valve port (13) and a second valve port (14) for communicating the chamber (8) with the lower valve cavity (52); the balancing spring (6) enables the valve stem (4) to always have a movement tendency to close the first valve port (13), and a speed regulating valve needle (9) for regulating the gas flow is provided at the second valve port (14); the chamber (8) is communicated with the upper valve cavity (51) through the channel (41) of the valve stem (4).

2. The vehicle-mounted slow-opening valve with speed regulation function according to claim 1, characterized in that: The valve seat (3) is provided with a mounting hole (31) for mounting a speed regulating valve needle (9), and the mounting hole (31) is concentrically arranged with the second valve port (14).

3. The vehicle-mounted slow-opening valve with speed regulation function according to claim 2, characterized in that: The speed regulating valve needle (9) is threadedly engaged with the mounting hole (31) so that the speed regulating valve needle (9) can move up and down relative to the second valve port (14), thereby adjusting the gap between the speed regulating valve needle (9) and the second valve port (14).

4. A vehicle-mounted slow-opening valve with speed regulation function according to claim 2 or 3, characterized in that: A first sealing ring (91) is provided between the speed regulating valve needle (9) and the mounting hole (31).

5. The vehicle-mounted slow-opening valve with speed regulation function according to claim 2 or 3, characterized in that: The top of the speed regulating valve needle (9) has a first cone head (92) corresponding to the second valve port (14).

6. The vehicle-mounted slow-opening valve with speed regulation function according to claim 2 or 3, characterized in that: The bottom of the speed regulating valve needle (9) has a notch (93).

7. The vehicle-mounted slow-opening valve with speed regulation function according to claim 1, characterized in that: The valve stem (4) is provided with an annular groove (42) for mounting a V-shaped sealing ring (7).

8. The vehicle-mounted slow-opening valve with speed regulation function according to claim 1 or 7, characterized in that: The V-shaped sealing ring (7) is provided with a V-shaped opening (71) facing downward.

9. The vehicle-mounted slow-opening valve with speed regulation function according to claim 1, characterized in that: The bottom end of the channel (41) of the valve stem (4) is provided with an annular step (411), the upper end of the valve cavity (5) is provided with a guide portion (53), the upper end of the balance spring (6) is sleeved on the guide portion (53), and the lower end of the balance spring (6) is abutted against the annular step (411).

10. The vehicle-mounted slow-opening valve with speed regulation function according to claim 9, characterized in that: The valve cover (2) is provided with a sleeve portion (21) extending into the interior of the valve cavity (5), the guide portion (53) is provided at the top end of the sleeve portion (21), and a second sealing ring (43) is provided between the upper end of the valve stem (4) and the sleeve portion (21); and a conical sealing ring (44) corresponding to the first valve port (13) is fixedly provided at the lower end of the valve stem (4).

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