Hydraulic output throttling structure

Abstract

The utility model belongs to the technical field of hydraulic throttle valves, in particular to a hydraulic output throttle structure, which comprises a throttle valve body, a throttle needle sleeve and a throttle needle bar, an adjusting cavity is arranged on the throttle valve body, an adjusting cone is fixed at the bottom end of the throttle needle bar, and the hydraulic output throttle structure further comprises an impurity removal mechanism. The throttling valve body is provided with a threaded hole matched with the threaded lead screw, the top end of the threaded lead screw penetrates through the threaded hole and then is embedded into the transition cavity, a sealing table is fixed to the top end of the threaded lead screw, and an impurity discharging opening communicated with the transition cavity is formed in the bottom of the throttling valve body. According to the throttling valve, through the arrangement of the impurity discharging mechanism, when necessary, the threaded lead screw is rotated to enable the sealing table to move upwards to be separated from the impurity discharging opening, residual hydraulic oil in the transition cavity can be discharged, the problem that the throttling valve is blocked due to the fact that too much hydraulic oil is accumulated is solved, the use reliability of the throttling valve is guaranteed, and meanwhile the service life of the throttling valve is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic throttle valve technology, specifically relating to a hydraulic output throttle structure. Background Technology

[0002] Hydraulic throttle valves are commonly used components in pressure boosting cylinders and hydraulic power units. They control fluid flow by changing the throttling cross-section or throttling length. A throttle valve and a check valve connected in parallel can be combined to form a check throttle valve. Throttling valves and check throttle valves are simple flow control valves. In a fixed displacement pump hydraulic system, throttle valves and relief valves can be used together to form three types of throttling speed control systems: inlet throttling speed control system, return throttling speed control system, and bypass throttling speed control system. Throttling valves do not have flow negative feedback function and cannot compensate for speed instability caused by load changes. They are generally only used in situations where the load change is small or the speed stability requirement is not high.

[0003] In actual use, hydraulic oil may contain impurities such as oil blocks, which may cause internal blockage of the hydraulic throttle valve.

[0004] A search of existing technology revealed a Chinese utility model patent with authorization announcement number CN218780563U, which discloses "an improved hydraulic throttle valve." The valve includes a hydraulic throttle valve body with a filter groove on its bottom surface. A filter frame is movably fitted inside the filter groove, and a sealing plate is fixedly installed on the bottom surface of the filter frame. An anti-clogging component is disposed inside the filter frame to prevent blockage of the hydraulic throttle valve body. The hydraulic throttle valve body, filter groove, filter frame, sealing plate, filter screen, limiting groove, slider, receiving groove, rotating groove, rotating hole, movable hole, rotating column, cleaning plate, mounting plate, and threaded hole work together to facilitate the filtration of hydraulic oil and other fluids entering the hydraulic throttle valve body.

[0005] Hydraulic throttle valves in the prior art, including those mentioned above, have the function of intercepting impurities, but a small amount of hydraulic oil cannot be completely discharged from the valve body. If not cleaned in time, the hydraulic oil is prone to caking and contamination over time, causing the residual hydraulic oil to gradually increase and eventually lead to blockage.

[0006] To address the aforementioned problems, this application proposes a hydraulic output throttling structure. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a hydraulic output throttling structure, which is convenient to use and easy to clean.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic output throttling structure, including a throttling valve body, a throttling needle sleeve, and a throttling needle rod. The throttling valve body has an adjustment cavity, the throttling needle sleeve is fixed within the adjustment cavity, and the throttling needle rod is screwed into the throttling needle sleeve. An adjusting cone is fixed to the bottom end of the throttling needle rod. A transition cavity is located within the throttling valve body corresponding to the position of the adjusting cone. The throttling valve body also has an oil outlet, an oil outlet channel connecting the oil outlet and the transition cavity, an oil inlet, and an oil inlet channel connecting the oil inlet and the transition cavity. It further includes a debris removal mechanism, which comprises:

[0009] A threaded screw has a threaded hole on the throttle valve body that mates with the threaded screw. The top end of the threaded screw passes through the threaded hole and is embedded in the transition cavity. A sealing platform is fixed at the top end of the threaded screw. A sludge discharge port communicating with the transition cavity is located at the bottom of the throttle valve body.

[0010] As a preferred embodiment of this utility model, the impurity removal mechanism further includes:

[0011] The No. 3 sealing ring is bonded and fixed to the bottom surface of the sealing platform.

[0012] As a preferred embodiment of this utility model, the impurity removal mechanism further includes:

[0013] A knob, which is fixed to the bottom end of the threaded screw.

[0014] As a preferred embodiment of this utility model, the impurity removal mechanism further includes:

[0015] A rubber plug is installed at the port of the discharge port.

[0016] As a preferred technical solution of this utility model, it also includes:

[0017] A filter assembly, wherein the filter assembly is fixed inside the oil inlet;

[0018] A filter screen, which is fixed inside the filter assembly.

[0019] As a preferred embodiment of this utility model, the filtering component includes:

[0020] The No. 1 adapter is fixed inside the oil inlet by a threaded engagement.

[0021] Nut No. 1, which is fixed on adapter No. 1, the filter screen is located inside nut No. 1, and nut No. 1 has internal threads;

[0022] The second adapter has an external thread that mates with the internal thread;

[0023] Nut No. 2 is fixed on adapter No. 2.

[0024] As a preferred technical solution of this utility model, it also includes:

[0025] A No. 1 sealing ring is provided, and a No. 1 sealing groove is provided on the throttling needle sleeve. The No. 1 sealing ring is located in the No. 1 sealing groove.

[0026] As a preferred technical solution of this utility model, it also includes:

[0027] The second sealing ring has a second sealing groove on the throttling needle rod, and the second sealing ring is located in the second sealing groove.

[0028] As a preferred embodiment of this invention, an auxiliary groove is provided at the top of the throttling needle rod.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] In this invention, the set impurity discharge mechanism can rotate the threaded screw when necessary to move the sealing platform up and away from the impurity discharge port, thereby discharging the residual hydraulic oil in the transition cavity. This avoids the problem of excessive hydraulic oil accumulation causing blockage of the throttle valve, ensuring the reliability of the throttle valve and extending its service life.

[0031] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This utility model Figure 1 A magnified schematic diagram of the impurity removal mechanism in the middle;

[0035] Figure 3 This is an exploded structural diagram of the filter component in this utility model.

[0036] In the diagram: 1. Throttling valve body; 11. Oil outlet; 12. Oil outlet channel; 13. Transition chamber; 14. Adjustment chamber; 15. Oil inlet channel; 16. Oil inlet; 17. Impurity discharge port; 18. Threaded hole; 2. Throttling needle sleeve; 21. No. 1 sealing groove; 3. Throttling needle rod; 31. No. 2 sealing groove; 32. Auxiliary groove; 4. Adjusting cone; 5. Filter assembly; 51. No. 1 adapter; 52. No. 1 nut; 521. Internal thread; 53. No. 2 adapter; 531. External thread; 532. No. 2 nut; 6. Filter screen; 7. No. 1 sealing ring; 8. No. 2 sealing ring; 9. Impurity discharge mechanism; 91. Threaded screw; 92. Sealing platform; 921. No. 3 sealing ring; 93. Knob; 94. Rubber plug. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1-3 The present invention provides the following technical solution: a hydraulic output throttling structure, including a throttling valve body 1, a throttling needle sleeve 2, and a throttling needle rod 3. The throttling valve body 1 has an adjustment cavity 14. The throttling needle sleeve 2 is fixed in the adjustment cavity 14. The throttling needle rod 3 is installed in the throttling needle sleeve 2 by threaded engagement. An adjusting cone 4 is fixed at the bottom end of the throttling needle rod 3. A transition cavity 13 is provided in the throttling valve body 1 at the position corresponding to the adjusting cone 4. The throttling valve body 1 also has an oil outlet 11, an oil outlet channel 12 connecting the oil outlet 11 and the transition cavity 13, an oil inlet 16, and an oil inlet channel 15 connecting the oil inlet 16 and the transition cavity 13. It also includes a waste removal mechanism 9, and the waste removal mechanism 9 includes a threaded screw 91.

[0039] Furthermore, by Figure 1 and Figure 2As shown in this embodiment, the throttle valve body 1 has a threaded hole 18 that mates with the threaded screw 91. The top end of the threaded screw 91 passes through the threaded hole 18 and is embedded in the transition cavity 13. A sealing platform 92 is fixed at the top end of the threaded screw 91. The bottom of the throttle valve body 1 has a sludge discharge port 17 that communicates with the transition cavity 13. With the above solution, during use, by rotating the throttle needle rod 3, the throttle needle rod 3 moves vertically under the threaded engagement, simultaneously driving the adjusting cone 4 to move, thereby adjusting the transition cavity 13. The effective opening size at the upper end of cavity 13 is used to adjust the flow rate of hydraulic oil and achieve throttling. If necessary, if there is residual hydraulic oil in transition cavity 13, the threaded screw 91 can be rotated to push the sealing plate 92 under the threaded engagement. At this time, the sealing plate 92 moves away from the discharge port 17, and the residual hydraulic oil in transition cavity 13 is discharged from the discharge port 17, avoiding the problem of excessive hydraulic oil accumulation causing blockage of the throttle valve, ensuring the reliability of the throttle valve, and also helping to extend the service life of the throttle valve.

[0040] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the impurity discharge mechanism 9 further includes a third sealing ring 921. The third sealing ring 921 is bonded and fixed to the bottom surface of the sealing platform 92. With the third sealing ring 921, during the operation of the throttle valve, the sealing platform 92 is at its lowest point, and the sealing platform 92 cooperates with the inner bottom surface of the transition cavity 13 to squeeze the third sealing ring 921, causing the third sealing ring 921 to contract and seal the impurity discharge port 17, preventing hydraulic oil from being accidentally discharged from the impurity discharge port 17.

[0041] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the impurity removal mechanism 9 further includes a knob 93, which is fixed to the bottom end of the threaded screw 91. The threaded screw 91 can be easily rotated by the knob 93.

[0042] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the impurity removal mechanism 9 further includes a rubber plug 94, which is installed at the port of the impurity removal port 17. With the above solution, during the operation of the throttle valve, the rubber plug 94 is inserted at the port of the impurity removal port 17 to prevent external dust from entering the impurity removal port 17. When removing impurities, the rubber plug 94 is pulled out.

[0043] Preferably, by Figure 1 As shown, this embodiment also includes a filter assembly 5 and a filter screen 6. The filter assembly 5 is fixed inside the oil inlet 16, and the filter screen 6 is fixed inside the filter assembly 5. The filter screen 6 can effectively intercept oil blocks in the hydraulic oil and prevent internal blockage of the throttle valve body 1.

[0044] Optionally, by Figure 1 and Figure 3 As shown in Figure 3 , in this embodiment, the filtering component 5 includes: a first adapter 51, a first nut 52, a second adapter 53, and a second nut 532. The first adapter 51 is fixed in the oil inlet 16 by a threaded engagement method. The first nut 52 is fixed on the first adapter 51. The filter screen 6 is located inside the first nut 52, and the first nut 52 has an internal thread 521. The second adapter 53 has an external thread 531 that mates with the internal thread 521. The second nut 532 is fixed on the second adapter 53. The second adapter 53 is fixedly connected to the first adapter 51 by a threaded engagement method for clamping the filter screen 6, ensuring the stability of the installation of the filter screen 6, and at the same time facilitating the disassembly and cleaning of the filter screen 6. During actual operation, one end of the second adapter 53 away from the first adapter 51 is connected to a tubing.

[0045] Preferably, Figure 1 As shown in Figure 1 , in this embodiment, it further includes: a first sealing ring 7. There is a first sealing groove 21 on the throttle needle sleeve 2. The first sealing ring 7 is located inside the first sealing groove 21. By providing the first sealing ring 7, it is easy to improve the sealing performance of the installation of the throttle needle sleeve 2.

[0046] Preferably, Figure 1 As shown in Figure 1 , in this embodiment, it further includes: a second sealing ring 8. There is a second sealing groove 31 on the throttle needle rod 3. The second sealing ring 8 is located inside the second sealing groove 31. By providing the second sealing ring 8, it is easy to improve the sealing performance of the installation of the throttle needle rod 3.

[0047] Preferably, Figure 1 As shown in Figure 1 , in this embodiment, at the top of the throttle needle rod 3, there is an auxiliary groove 32. The auxiliary groove 32 can be in the shape of a "one" character, a "ten" character, a regular hexagon, etc., which is convenient for turning the throttle needle rod 3 with the aid of tools.

[0048] Components not described in detail herein are prior art.

[0049] Working principle and usage process of the present utility model: For the throttle valve of the present utility model, when in use, by rotating the throttle needle rod 3, the throttle needle rod 3 moves vertically under the action of threaded engagement, and at the same time drives the adjusting cone 4 to move, adjusting the effective opening size at the upper end of the transition chamber 13 for adjusting the flow rate of the hydraulic oil to achieve throttling;

[0050] When necessary, if there is residual hydraulic oil in the transition chamber 13, at this time, the threaded screw rod 91 can be rotated to make the threaded screw rod 91 push the sealing platform 92 under the action of threaded engagement. At this time, the sealing platform 92 moves away from the impurity discharge port 17, and the residual hydraulic oil in the transition chamber 13 is discharged from the impurity discharge port 17, avoiding the problem of the throttle valve being blocked due to excessive accumulation of hydraulic oil, ensuring the reliability of the use of the throttle valve, and at the same time being beneficial to extending the service life of the throttle valve;

[0051] The filter screen 6 can effectively intercept oil blocks in the hydraulic oil, preventing internal blockage of the throttle valve body 1.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic output throttling structure, comprising a throttling valve body (1), a throttling needle sleeve (2), and a throttling needle rod (3), wherein the throttling valve body (1) has an adjustment cavity (14), the throttling needle sleeve (2) is fixed in the adjustment cavity (14), the throttling needle rod (3) is installed in the throttling needle sleeve (2) by threaded engagement, and an adjusting cone (4) is fixed at the bottom end of the throttling needle rod (3), a transition cavity (13) is provided in the throttling valve body (1) corresponding to the position of the adjusting cone (4), and the throttling valve body (1) also has an oil outlet (11), an oil outlet channel (12) connecting the oil outlet (11) and the transition cavity (13), an oil inlet (16), and an oil inlet channel (15) connecting the oil inlet (16) and the transition cavity (13), characterized in that, It also includes a waste removal mechanism (9), and the waste removal mechanism (9) includes: A threaded screw (91) has a threaded hole (18) on the throttle valve body (1) that mates with the threaded screw (91). The top end of the threaded screw (91) passes through the threaded hole (18) and is embedded in the transition cavity (13). A sealing platform (92) is fixed at the top end of the threaded screw (91). A sludge discharge port (17) communicating with the transition cavity (13) is located at the bottom of the throttle valve body (1).

2. The hydraulic output throttling structure according to claim 1, characterized in that: The waste removal mechanism (9) also includes: The No. 3 sealing ring (921) is bonded and fixed to the bottom surface of the sealing platform (92).

3. The hydraulic output throttling structure according to claim 1, characterized in that: The waste removal mechanism (9) also includes: A knob (93) is fixed to the bottom end of the threaded screw (91).

4. The hydraulic output throttling structure according to claim 1, characterized in that: The waste removal mechanism (9) also includes: A rubber plug (94) is installed at the port of the discharge port (17).

5. The hydraulic output throttling structure according to claim 1, characterized in that: Also includes: A filter assembly (5) is fixed inside the oil inlet (16); A filter screen (6) is fixed inside the filter assembly (5).

6. The hydraulic output throttling structure according to claim 5, characterized in that: The filter component (5) includes: The first adapter (51) is fixed inside the oil inlet (16) by means of thread engagement; Nut 1 (52) is fixed on adapter 1 (51), filter screen (6) is located inside nut 1 (52), and nut 1 (52) has internal thread (521); Second adapter (53), the second adapter (53) has an external thread (531) that mates with the internal thread (521); Nut No. 2 (532) is fixed on adapter No. 2 (53).

7. The hydraulic output throttling structure according to claim 1, characterized in that: Also includes: A first sealing ring (7) has a first sealing groove (21) on the throttling needle sleeve (2), and the first sealing ring (7) is located in the first sealing groove (21).

8. The hydraulic output throttling structure according to claim 1, characterized in that: Also includes: The second sealing ring (8) has a second sealing groove (31) on the throttling needle rod (3), and the second sealing ring (8) is located in the second sealing groove (31).

9. The hydraulic output throttling structure according to claim 1, characterized in that: An auxiliary groove (32) is provided at the top of the throttling needle rod (3).

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