Throttle regulating valve

Abstract

The utility model belongs to the field of regulating valves, and particularly relates to a throttling regulating valve which is characterized in that a valve element, a valve rod and a threaded regulating rod in the throttling regulating valve are of an integrated structure and can be integrally formed through casting or machining (such as cutting), and interference caused by assembly errors is reduced; during use, the threaded adjusting rod is manually rotated, the conical face on the valve element abuts against or is separated from the end, close to the valve cavity, of the air inlet channel, the distance between the conical face and the end, close to the valve cavity, of the air inlet channel is adjusted, then opening, closing and flow adjustment are achieved, and adjustment is more sensitive and convenient.

Description

Technical Field

[0001] The present application relates to the technical field of regulating valves, and in particular to a throttling regulating valve. Background Art

[0002] As a part of the air valve plate, the throttle regulating valve is installed in the pantograph air valve plate to form a complete one-way throttle valve, which is used to adjust the pantograph raising and lowering time. In the traditional regulating valve, the valve core and the threaded regulating rod used to drive the valve core to move are processed and manufactured separately during production, and then assembled. The assembly is troublesome and there are assembly errors, which affects the sensitivity of the adjustment in subsequent use. Utility Model Content

[0003] The embodiment of the present application provides a throttling control valve, which is used to reduce interference caused by assembly errors and is more sensitive and convenient to adjust.

[0004] To achieve the above-mentioned purpose, the present application provides a throttling regulating valve, including a valve body, a valve core, a valve stem, a threaded regulating rod and a one-way sealing ring; the valve body is tubular, and the interior of the valve body includes a threaded channel, a valve cavity and an air inlet channel which are connected in sequence, the inner diameter of the air inlet channel is smaller than the inner diameter of the valve cavity, and the end of the air inlet channel away from the valve cavity is an air inlet, the side wall of the valve body is circumferentially provided with an annular groove, and the valve body is provided with an air outlet which connects the annular groove with the valve cavity; the valve core is movably arranged in the valve cavity, and the valve One end of the core facing the air inlet passage is a conical surface; the threaded adjustment rod is inserted into the threaded passage and is threadedly connected to the threaded passage; the end of the threaded adjustment rod extending into the threaded passage is connected to the valve core through the valve stem; the threaded adjustment rod is screwed to drive the valve core to move in the valve cavity through the valve stem; the valve core, the valve stem and the threaded adjustment rod are an integrated structure; a circumferential groove is provided on the outer wall of the valve body corresponding to the position of the air inlet passage, and the one-way sealing ring is provided in the circumferential groove;

[0005] Among them, when the throttling regulating valve is installed in place in the mounting hole, there is a gap between the side wall of the valve body between the annular groove and the air inlet and the inner wall of the mounting hole, and the outer edge of the one-way sealing ring is against the inner wall of the mounting hole. The one-way sealing ring allows the gas in the gap to flow only from the end where the air inlet is located to the annular groove.

[0006] Optionally, the throttling regulating valve further comprises a locking nut, and one end of the threaded regulating rod away from the valve stem extends out of the threaded channel, and the locking nut is threadedly connected to a portion of the threaded regulating rod extending out of the threaded channel.

[0007] Optionally, the inner diameters of the threaded channel, the inner diameters of the valve cavity, and the inner diameters of the air inlet channel decrease in sequence.

[0008] Optionally, a plurality of the air outlets are provided, and the plurality of the air outlets are evenly distributed in the annular groove along the circumferential direction.

[0009] Optionally, the air outlet is close to the connection between the air inlet channel and the valve cavity, the outer wall of the valve stem is circumferentially provided with an annular groove, an O-ring is provided in the annular groove, and the O-ring is abutted against the inner wall of the valve cavity between the air outlet and the threaded channel.

[0010] Optionally, a screwing portion is provided on the outer wall of the valve body at a position corresponding to the threaded channel, and an external thread for external connection is provided on the outer wall of the valve body between the screwing portion and the annular groove.

[0011] Optionally, an outer wall of the valve body is provided with an embedding groove along the circumferential direction at a connection between the screwing portion and the external thread, and a sealing rubber ring is provided in the embedding groove.

[0012] The beneficial effect of the throttling regulating valve provided by the present application is that compared with the prior art, the valve core, valve stem and threaded regulating rod in the throttling regulating valve of the present application are an integrated structure, which can be formed as one piece through casting or machining (such as cutting), thereby reducing the interference caused by assembly errors; when in use, the threaded regulating rod is manually rotated to make the conical surface on the valve core abut or disengage from the end of the inlet channel close to the valve cavity, and adjust the distance between the conical surface and the end of the inlet channel close to the valve cavity, thereby realizing the opening and closing and flow rate adjustment, and the adjustment is more sensitive and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] in:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a throttling regulating valve shown in an embodiment of the present application;

[0016] Figure 2 is a schematic cross-sectional structural diagram of a throttling control valve shown in an embodiment of the present application;

[0017] Figure 3 is an exploded schematic diagram of a throttling control valve shown in an embodiment of the present application;

[0018] Figure 4It is a schematic diagram of the cross-sectional structure of a throttling control valve in actual use shown in one embodiment of the present application.

[0019] Description of main component symbols:

[0020] 1. Valve plate; 2. Mounting hole; 3. Internal thread;

[0021] 10. Valve body; 101. Threaded channel; 102. Valve cavity; 103. Air inlet channel; 1031. Air inlet; 104. Annular groove; 105. Air outlet; 106. Circumferential groove; 11. Screw portion; 12. External thread;

[0022] 20. valve core; 201. conical surface;

[0023] 30. Valve stem;

[0024] 40. Threaded adjustment rod;

[0025] 50. One-way sealing ring;

[0026] 60. Locking nut;

[0027] 70. O-ring;

[0028] 80. Sealing rubber ring. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 application. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0034] The embodiment of the present application provides a throttling regulating valve, such as Figure 1-Figure 3 As shown, the throttling regulating valve comprises a valve body 10, a valve core 20, a valve stem 30, a threaded regulating rod 40 and a one-way sealing ring 50; the valve body 10 is tubular, and the interior of the valve body 10 comprises a threaded passage 101, a valve cavity 102 and an air inlet passage 103 which are connected in sequence, the inner diameter of the air inlet passage 103 is smaller than the inner diameter of the valve cavity 102, and the end of the air inlet passage 103 away from the valve cavity 102 is an air inlet 1031, and the side wall of the valve body 10 is circumferentially provided with an annular groove 104, and the valve body 10 is provided with an air outlet 105 which connects the annular groove 104 with the valve cavity 102; the valve core 20 is movably arranged in the valve cavity 102, and the valve core 2 0 has a conical surface 201 at one end facing the air inlet passage 103; a threaded adjusting rod 40 is inserted into the threaded passage 101 and is threadedly connected to the threaded passage 101; an end of the threaded adjusting rod 40 extending into the threaded passage 101 is connected to an end of the valve core 20 away from the conical surface 201 through the valve stem 30; screwing the threaded adjusting rod 40 can drive the valve core 20 to move in the valve cavity 102 through the valve stem 30; the valve core 20, the valve stem 30 and the threaded adjusting rod 40 are an integrated structure; a circumferential groove 106 is provided on the outer wall of the valve body 10 at a position corresponding to the air inlet passage 103, and a one-way sealing ring 50 is provided in the circumferential groove 106.

[0035] Among them, Figure 4 As shown, when the throttling regulating valve is installed in place in the mounting hole 2, there is a gap between the side wall of the valve body 10 between the annular groove 104 and the air inlet 1031 and the inner wall of the mounting hole 2, and the outer edge of the one-way sealing ring 50 is against the inner wall of the mounting hole 2. The one-way sealing ring 50 allows the gas in the gap to flow only from the end where the air inlet 1031 is located to the annular groove 104.

[0036] When the throttling regulating valve is used on the air valve plate 1, when adjustment is needed, the valve stem 30 is manually adjusted clockwise, the flow rate becomes smaller, the bow raising and lowering speed becomes slower, the bow raising time is prolonged, and the minimum adjustable state is a fully closed state; counterclockwise adjustment increases the flow rate, and correspondingly, the bow raising and lowering speed becomes faster.

[0037] In the embodiment of the present application, the valve core 20, valve stem 30 and threaded adjustment rod 40 in the throttling control valve are an integrated structure, which can be formed as one piece through casting or machining (such as cutting) to reduce interference caused by assembly errors; when in use, the threaded adjustment rod 40 is manually rotated to make the conical surface 201 on the valve core 20 abut or disengage from the end of the intake channel 103 close to the valve cavity 102, and adjust the distance between the conical surface 201 and the end of the intake channel 103 close to the valve cavity 102, thereby realizing the opening and closing and flow rate adjustment, and the adjustment is more sensitive and convenient.

[0038] In one embodiment, if Figure 1-Figure 2 As shown, the throttling regulating valve further includes a locking nut 60 , an end of the threaded regulating rod 40 away from the valve stem 30 extends out of the threaded channel 101 , and the locking nut 60 is threadedly connected to the portion of the threaded regulating rod 40 extending out of the threaded channel 101 .

[0039] The locking nut 60 is used to fix the threaded adjustment rod 40 . When adjustment is required, the locking nut 60 is first loosened. After the adjustment is completed, the locking nut 60 is rotated to make the locking nut 60 abut against the valve body 10 .

[0040] In one embodiment, if Figure 2 As shown, the inner diameters of the threaded passage 101, the valve cavity 102 and the air inlet passage 103 decrease in sequence. Thus, the interior of the tubular valve body 10 is a three-level stepped hole, which is convenient for processing.

[0041] In one embodiment, if Figure 1-Figure 4 As shown, a plurality of air outlets 105 are provided, and the plurality of air outlets 105 are evenly distributed in the annular groove 104 along the circumferential direction.

[0042] It can be understood that, since the side wall of the valve body 10 is circumferentially provided with an annular groove 104, the air outlet 105 connects the annular groove 104 with the valve cavity 102. Therefore, when the throttling regulating valve is used, after it is installed in the mounting hole 2 on the air valve plate 1, it is only necessary to ensure that the corresponding air path on the air valve plate 1 is connected with the annular groove 104 on the valve body 10.

[0043] Providing multiple air outlets 105 can prevent the entire throttling control valve from failing to work when one of the air outlets 105 is blocked.

[0044] In one embodiment, if Figure 1-Figure 3 As shown, the air outlet 105 is close to the connection between the air inlet channel 103 and the valve cavity 102, and the outer wall of the valve stem 30 is circumferentially provided with an annular groove, and an O-ring 70 is provided in the annular groove. The O-ring 70 abuts against the inner wall of the valve cavity 102 between the air outlet 105 and the threaded channel 101.

[0045] By providing the O-ring 70 , the air tightness between the valve stem 30 and the valve cavity 102 is further improved.

[0046] In one embodiment, if Figure 1-Figure 4 As shown, a screwing portion 11 is provided on the outer wall of the valve body 10 at a position corresponding to the screw channel 101 , and an external thread 12 for external connection is provided on the outer wall of the valve body 10 between the screwing portion 11 and the annular groove 104 .

[0047] The external thread 12 on the valve body 10 is used for external installation and fixing through threaded connection. When in use, it is only necessary to set the internal thread 3 adapted to the external thread 12 at the corresponding position in the mounting hole 2 of the air valve plate 1. The screwing part 11 is provided to facilitate the application of force to the valve body 10 when installing and disassembling the throttling regulating valve. Specifically, the screwing part 11 can be an external hexagonal nut integrally formed with the valve body 10, which is convenient for applying force through a wrench.

[0048] In a specific embodiment, please continue to refer to Figure 1-Figure 4 The outer wall of the valve body 10 is provided with an embedding groove along the circumferential direction at the connection between the screwing part 11 and the external thread 12, and a sealing rubber ring 80 is provided in the embedding groove. The sealing ring is used to improve the air tightness between the valve body 10 and the air valve plate 1, and prevent air leakage from the valve body 10 and the mounting hole 2 on the air valve plate 1.

[0049] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A throttling control valve, characterized in that: The valve body comprises a valve body, a valve core, a valve stem, a threaded adjustment rod and a one-way sealing ring; the valve body is tubular, the interior of the valve body comprises a threaded passage, a valve cavity and an air inlet passage which are connected in sequence, the inner diameter of the air inlet passage is smaller than the inner diameter of the valve cavity, the end of the air inlet passage away from the valve cavity is an air inlet, the side wall of the valve body is circumferentially provided with an annular groove, and the valve body is provided with an air outlet which connects the annular groove with the valve cavity; the valve core is movably arranged in the valve cavity, and the end of the valve core facing the air inlet passage is a conical surface; the threaded adjustment rod is penetrated in the threaded passage and is threadedly connected with the threaded passage, the end of the threaded adjustment rod extending into the threaded passage is connected with the valve core through the valve stem, and the threaded adjustment rod can be screwed to drive the valve core to move in the valve cavity through the valve stem; the valve core, the valve stem and the threaded adjustment rod are an integrated structure; the outer wall of the valve body is provided with a circumferential groove corresponding to the position of the air inlet passage, and the one-way sealing ring is arranged in the circumferential groove; Among them, when the throttling regulating valve is installed in place in the mounting hole, there is a gap between the side wall of the valve body between the annular groove and the air inlet and the inner wall of the mounting hole, and the outer edge of the one-way sealing ring is against the inner wall of the mounting hole. The one-way sealing ring allows the gas in the gap to flow only from the end where the air inlet is located to the annular groove.

2. The throttle control valve according to claim 1, characterized in that: The throttling regulating valve also includes a locking nut. One end of the threaded regulating rod away from the valve stem extends out of the threaded channel. The locking nut is threadedly connected to a portion of the threaded regulating rod extending out of the threaded channel.

3. The throttle control valve according to claim 1, characterized in that: The inner diameters of the threaded passage, the valve cavity and the air inlet passage decrease in sequence.

4. The throttle control valve according to claim 1, characterized in that: A plurality of air outlets are provided, and the plurality of air outlets are evenly distributed in the annular groove along the circumferential direction.

5. The throttle control valve according to claim 1, characterized in that: The air outlet is close to the connection between the air inlet channel and the valve cavity. The outer wall of the valve stem is circumferentially provided with an annular groove, and an O-ring is provided in the annular groove. The O-ring and the inner wall of the valve cavity between the air outlet and the threaded channel are against each other.

6. The throttle control valve according to any one of claims 1 to 5, characterized in that: The outer wall of the valve body is provided with a screwing portion at a position corresponding to the threaded channel, and the outer wall of the valve body between the screwing portion and the annular groove is provided with an external thread for external connection.

7. The throttle regulating valve according to claim 6, characterized in that: The outer wall of the valve body is provided with an embedding groove along the circumferential direction at the connection between the screwing portion and the external thread, and a sealing rubber ring is provided in the embedding groove.

Images