Straight stroke driving mechanism and cone valve

Abstract

The utility model discloses a straight stroke driving mechanism and a cone valve, and relates to the technical field of pipeline valves. A first input shaft, a first output shaft and a second output shaft are arranged on the T-shaped one-inlet and two-outlet bevel gear transmission case, a second input shaft and a third output shaft are arranged on the L-shaped one-inlet and one-outlet bevel gear transmission case, and the first output shaft and the second input shaft are oppositely arranged and are connected through a universal coupling; the second output shaft is in driving connection with a first bevel gear reduction box below, and an output shaft of the first bevel gear reduction box is in driving connection with a first lead screw mechanism on the side; the third output shaft is in driving connection with a second bevel gear reduction box below, and an output shaft of the second bevel gear reduction box is in driving connection with a second lead screw mechanism on the side; and the rotating directions of the first screw rod mechanism and the second screw rod mechanism are consistent. A pure mechanical structure is adopted for driving, the consistency of mechanical gaps on the two sides is ensured through accurate manufacturing and assembling, and therefore absolute synchronization of driving mechanisms on the two sides is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valves, in particular to a linear drive mechanism and a cone valve. Background Art

[0002] In the field of valve control, especially for large cone valves that need to accurately control the opening and closing positions, traditional drive mechanisms often have problems such as poor synchronization, easy jamming, and complex structure. In traditional designs, a single drive source is often used to drive the opening and closing of the valve through a complex connecting rod mechanism or chain drive. This method not only increases the complexity and maintenance difficulty of the system, but also easily leads to asynchronous driving on both sides, which in turn causes the valve to jam or not open or close properly. In addition, for large cone valves, a single drive source often cannot provide sufficient driving force when facing high loads or extreme working conditions, affecting the stability and reliability of the valve. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a linear drive mechanism and a cone valve with a compact structure, good synchronization and strong driving force. The mechanism realizes effective distribution and steering of power through a T-type one-in-two-out bevel gear transmission box and an L-type one-in-one-out bevel gear transmission box, and at the same time uses a universal shaft coupling to connect the two transmission boxes to ensure smooth power transmission under different shaft conditions. In addition, by introducing a bevel gear reduction box and a screw mechanism, not only the driving thrust is amplified, but also the precise control of the sleeve brake is achieved.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a linear travel drive mechanism, comprising a T-type one-input and two-output bevel gear transmission box and an L-type one-input and one-output bevel gear transmission box which are arranged in parallel and at intervals, wherein the T-type one-input and two-output bevel gear transmission box is provided with a first input shaft, a first output shaft and a second output shaft, and the L-type one-input and one-output bevel gear transmission box is provided with a second input shaft and a third output shaft, the first output shaft is arranged opposite to the second input shaft and is connected through a universal joint; the second output shaft is drivingly connected to a first bevel gear reduction box below, and the output shaft of the first bevel gear reduction box is drivingly connected to a first screw mechanism on the side; the third output shaft is drivingly connected to a second bevel gear reduction box below, and the output shaft of the second bevel gear reduction box is drivingly connected to a second screw mechanism on the side; the first screw mechanism and the second screw mechanism have the same rotation direction.

[0006] Preferably, the universal joint coupling comprises a long drive shaft, and trunnions are fixed at both ends of the long drive shaft, wherein one of the trunnions is connected to the first output shaft via a pin, and the other trunnion is connected to the second input shaft via a pin.

[0007] Preferably, the second output shaft is connected to the first bevel gear reduction box via a short drive shaft, the third output shaft is connected to the second bevel gear reduction box via a short drive shaft, and the two short drive shafts are parallel to each other.

[0008] Preferably, the first screw mechanism includes a first screw, one end of which is connected to the output shaft of the first bevel gear reducer, and the other end is used to connect to a driving object; the first screw has a first shoulder, and the inner and outer sides of the first shoulder are respectively provided with a first inner valve seat and a first outer sleeve which are mounted on the first screw, and the first inner valve seat and the first outer sleeve are used to limit the movement of the first shoulder in the length direction.

[0009] Preferably, one end of the first screw rod close to the driven object has a T-shaped thread, a first nut is engaged on the T-shaped thread, and the first nut is fixedly connected to the driven object.

[0010] Preferably, the second screw mechanism includes a second screw, one end of which is connected to the output shaft of the second bevel gear reducer, and the other end is used to connect to a driving object; the second screw has a second shoulder, and the inner and outer sides of the second shoulder are respectively provided with a second inner valve seat and a second outer sleeve which are mounted on the second screw, and the second inner valve seat and the second outer sleeve are used to limit the movement of the second shoulder in the length direction.

[0011] Preferably, one end of the second screw rod close to the driven object has a T-shaped thread, a second nut is engaged on the T-shaped thread, and the second nut is fixedly connected to the driven object.

[0012] The utility model also provides a cone valve, including a valve body, a valve core, a sleeve gate, a water inlet pipe and the linear drive mechanism; the T-type one-inlet and two-outlet bevel gear transmission box, the L-type one-inlet and one-outlet bevel gear transmission box, the first bevel gear reduction box and the second bevel gear reduction box are all fixed on the water inlet pipe, and the first screw mechanism and the second screw mechanism are both drivingly connected to the sleeve gate.

[0013] Preferably, the T-type one-inlet and two-outlet bevel gear transmission box is fixed to the water inlet pipe via a first transmission box support, and the L-type one-inlet and one-outlet bevel gear transmission box is fixed to the water inlet pipe via a second transmission box support; the first bevel gear reduction box is fixed to the water inlet pipe via a first reduction box support, and the second bevel gear reduction box is fixed to the water inlet pipe via a second reduction box support.

[0014] Preferably, a first inner valve seat is embedded in the first reduction gearbox support, a first outer sleeve is embedded in the water inlet pipe, the first inner valve seat is in contact with the first outer sleeve and a limiting groove is formed for embedding the first shaft shoulder; a second inner valve seat is embedded in the second reduction gearbox support, a second outer sleeve is embedded in the water inlet pipe, the second inner valve seat is in contact with the second outer sleeve and a limiting groove is formed for accommodating the second shaft shoulder.

[0015] Compared with the prior art, the linear drive mechanism of the utility model and the cone valve used therein have the following significant advantages and beneficial effects:

[0016] (1) The utility model adopts a purely mechanical structure drive, and through precise manufacturing and assembly, the consistency of the mechanical clearance on both sides is ensured, thereby achieving absolute synchronization of the driving mechanisms on both sides. This synchronization avoids the uncoordinated movement caused by one side moving while the other side is idling, and effectively prevents the occurrence of jamming. The speed ratio of the T-type one-in-two-out bevel gear transmission box and the L-type one-in-one-out bevel gear transmission box is designed to be 1:1, which is mainly used for power distribution and steering, ensuring the balance of power transmission.

[0017] (2) The use of universal couplings ensures that even if there is misalignment between the T-type one-in-two-out bevel gear transmission box and the L-type one-in-one-out bevel gear transmission box, power transmission can be kept smooth without blocking or uneven power distribution. This design improves the flexibility and adaptability of the system, enabling it to operate stably under different working conditions.

[0018] (3) The rotation direction of the two screw mechanisms is consistent, and they ultimately drive the same part (sleeve brake). Since the torques acting on the sleeve brake are in opposite directions, they can offset each other, avoiding the rotation or jamming of the sleeve. This design makes the driving process smoother and more reliable.

[0019] (4) The selective reduction ratio design of the bevel gear reducer can amplify the driving thrust as needed, thereby improving the transmission efficiency. At the same time, the layout of the entire transmission system is reasonable, the transmission path is short, and energy loss is reduced.

[0020] (5) The transmission box, reduction box and other components are fixed to the water inlet pipe through the support, with a compact structure and reasonable layout, which is easy to install and maintain. The inner valve seat and outer sleeve design on the screw mechanism not only play a limiting role, but also facilitate the replacement and maintenance of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the linear travel drive mechanism of the utility model.

[0022] Figure 2This is a side view of the utility model's linear drive mechanism installed on a cone valve. Figure 1 .

[0023] Figure 3 This is a side view of the utility model's linear drive mechanism installed on a cone valve. Figure 2 .

[0024] Figure numerals: 1. T-type one-input and two-output bevel gear transmission box; 101. first input shaft; 102. first output shaft; 103. second output shaft; 2. L-type one-input and one-output bevel gear transmission box; 201. second input shaft; 202. third output shaft; 3. universal joint; 301. long drive shaft; 302. ear shaft; 303. pin; 4. first bevel gear reduction box; 5. first screw mechanism; 501. first screw; 502. first shaft shoulder; 503. The first inner valve seat; 504, the first outer sleeve; 505, the first nut; 6, the second bevel gear reduction box; 7, the second screw mechanism; 701, the second screw; 702, the second shaft shoulder; 703, the second inner valve seat; 704, the second outer sleeve; 705, the second nut; 8, the short drive shaft; 9, the sleeve gate; 10, the water inlet pipe; 11, the first transmission box support; 12, the second transmission box support; 13, the first reduction box support; 14, the second reduction box support. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0026] The present specific implementation manner aims to describe in detail the linear drive mechanism of the utility model and its application in a cone valve, and further illustrate its structural composition, working principle and technical features in a preferred embodiment.

[0027] like Figure 1-3 As shown, a linear drive mechanism includes the following main components: a T-type one-input and two-output bevel gear transmission box 1, an L-type one-input and one-output bevel gear transmission box 2, a universal joint 3, a bevel gear reduction box and a screw mechanism.

[0028] A T-type one-input and two-output bevel gear transmission box 1 is designed as a one-input and two-output type, which includes a first input shaft 101 driven by an external power source such as a motor; a first output shaft 102 and a second output shaft 103 are vertically arranged, and power distribution and steering are achieved through internal bevel gears.

[0029] The L-shaped one-input-one-output bevel gear transmission box 2, as an auxiliary transmission unit, has a second input shaft 201 and a third output shaft 202. The second input shaft 201 is connected to the first output shaft 102 through a universal joint 3 to ensure continuous transmission of power, and the third output shaft 202 is used for another power output.

[0030] Specifically, the second output shaft 103 is connected to the first bevel gear reduction box 4 via a short drive shaft 8, and the third output shaft 202 is connected to the second bevel gear reduction box 6 via a short drive shaft 8, and the two short drive shafts 8 are parallel to each other.

[0031] In the above structural design, precise mechanical design and manufacturing are used to ensure that the driving mechanisms on both sides are absolutely synchronized under the same conditions, thereby improving the stability and reliability of the system.

[0032] The universal joint 3 is designed with a long drive shaft 301, with ear shafts 302 at both ends and connected to the first output shaft 102 and the second input shaft 201 through pins 303. It can micro-adjust the imbalance at both ends to ensure flexible transmission of power between different axis lines, ensuring the flexibility and stability of power transmission.

[0033] In the above structural design, the universal joint 3 is used to connect the transmission boxes of different axes, which effectively solves the power transmission problem caused by the installation position deviation and enhances the flexibility and adaptability of the system. The design of the pure mechanical structure reduces the use of electronic components, reduces the failure rate and maintenance cost, and improves the economy and practicality of the system.

[0034] The bevel gear reduction box includes a first bevel gear reduction box 4 and a second bevel gear reduction box 6, which are respectively connected to the second output shaft 103 and the third output shaft 202, and increase the torque and reduce the rotation speed through precise gear reduction, so as to efficiently drive the screw mechanism.

[0035] In the above structural design, the bevel gear reducer amplifies the driving thrust by selecting a suitable reduction ratio, allowing the system to easily cope with large load conditions.

[0036] The screw mechanism is divided into a first screw mechanism 5 and a second screw mechanism 7, each of which is equipped with a first screw 501 and a second screw 701, and driven by a bevel gear reducer. One end of the screw is connected to the reducer, and the other end is provided with a T-shaped thread to cooperate with a corresponding nut to drive the sleeve gate 9. Since the nut is locked on the sleeve gate 9 by a screw and cannot rotate with the screw, it can only slide, thereby generating a linear motion, driving the sleeve gate 9 on the cone valve to move back and forth, thereby achieving the purpose of opening and closing the cone valve.

[0037] Specifically, the first screw rod 501 has a first shaft shoulder 502, and the first shaft shoulder 502 is respectively provided with a first inner valve seat 503 and a first outer shaft sleeve 504 sleeved on the first screw rod 501 on both inner and outer sides. The first inner valve seat 503 and the first outer shaft sleeve 504 are in contact with each other and form a limit groove for accommodating the first shaft shoulder 502, which is used to limit the movement of the first shaft shoulder 502 in the length direction, so as to prevent the screw rod from moving forward and backward due to rotation. The end of the first screw rod 501 close to the driven object has a T-shaped thread, and a first nut 505 is engaged on the T-shaped thread. The first nut 505 is fixedly connected to the sleeve gate 9 to drive the sleeve gate 9.

[0038] Specifically, the second screw rod 701 has a second shaft shoulder 702, and the second shaft shoulder 702 is respectively provided with a second inner valve seat 703 and a second outer shaft sleeve 704 sleeved on the second screw rod 701 on both inner and outer sides. The second inner valve seat 703 and the second outer shaft sleeve 704 are in contact with each other and form a limit groove for accommodating the second shaft shoulder 702, which is used to limit the movement of the second shaft shoulder 702 in the length direction, so as to prevent the screw rod from moving forward and backward due to rotation. The end of the second screw rod 701 close to the driven object has a T-shaped thread, and a second nut 705 is engaged on the T-shaped thread, and the second nut 705 is fixedly connected to the driven object.

[0039] Based on the structural design of the above-mentioned linear drive mechanism, a cone valve is also provided, which includes a valve body, a valve core, a sleeve gate 9 and a water inlet pipe 10, wherein the water inlet pipe 10 serves as an installation base for the entire drive mechanism.

[0040] The installation steps are as follows:

[0041] First, fix the T-type one-in-two-out bevel gear transmission box 1 on the water inlet pipe 10 through the first transmission box support 11 to ensure stability without shaking. Then, install the L-type one-in-one-out bevel gear transmission box 2 and fix it through the second transmission box support 12 to ensure the accuracy of the relative position of the two transmission boxes. Use the universal joint 3 to connect the first output shaft 102 of the T-type one-in-two-out bevel gear transmission box 1 and the second input shaft 201 of the L-type one-in-one-out bevel gear transmission box 2, and adjust them to the optimal transmission state. Install the first bevel gear reduction box 4 and the second bevel gear reduction box 6, respectively fix them on the water inlet pipe 10 through the first reduction box support 13 and the second reduction box support 14, and connect their respective input shafts (i.e., the second output shaft 103 of the T-type one-in-two-out bevel gear transmission box 1 and the third output shaft 202 of the L-type one-in-one-out bevel gear transmission box 2). The first outer sleeve 504 and the second outer sleeve 704 are embedded in the water inlet pipe 10, and the corresponding first inner valve seat 503 and the second inner valve seat 703 are embedded in the first reduction box support 13 and the second reduction box support 14 to form a limit for the screw shaft shoulder. Finally, the first screw mechanism 5 and the second screw mechanism 7 are installed to ensure that one end of the screw is tightly connected to the reduction box output shaft, and the other end is fixedly connected to the sleeve gate 9 through a T-shaped threaded nut.

[0042] Here’s how it works:

[0043] When external power (such as a motor) drives the T-type one-input and two-output bevel gear transmission box 1 through the first input shaft 101, the power is distributed to the first output shaft 102 and the second output shaft 103 at a constant speed. The first output shaft 102 transmits the power to the second input shaft 201 of the L-type one-input and one-output bevel gear transmission box 2 through the universal joint 3, and then outputs it to the third output shaft 202. The second output shaft 103 and the third output shaft 202 drive the first bevel gear reduction box 4 and the second bevel gear reduction box 6 respectively, and after being amplified by the reduction ratio, drive the screw mechanisms connected to each other. Since the rotation directions of the two screw mechanisms are consistent and the torque directions acting on the sleeve gate 9 are opposite, the sleeve gate 9 realizes linear motion under the synchronous and stable driving force on both sides to control the opening and closing of the valve.

[0044] The operation process is as follows:

[0045] Start an external power source, such as a motor. The power is transmitted to the screw mechanism through the transmission system, driving the sleeve brake 9 to start moving. The speed and direction of the motor are adjusted as needed to achieve precise control of the sleeve brake 9. During the operation of the system, due to the use of a purely mechanical structure, the drive synchronization on both sides is good, avoiding jamming and idling.

[0046] In summary, the linear drive mechanism of the utility model and its application in the cone valve realize efficient and stable linear drive control through a series of innovative designs. It is suitable for various valve systems that require precise control of opening and closing, and significantly improves work efficiency and reliability.

[0047] According to the description and drawings of the utility model, those skilled in the art can easily manufacture or use a linear drive mechanism of the utility model, and can produce the positive effects recorded in the utility model.

[0048] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention 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 operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0049] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A linear drive mechanism, characterized in that: The invention comprises a T-type one-input two-output bevel gear transmission box (1) and an L-type one-input one-output bevel gear transmission box (2) which are arranged in parallel and at intervals, wherein the T-type one-input two-output bevel gear transmission box (1) has a first input shaft (101), a first output shaft (102) and a second output shaft (103), and the L-type one-input one-output bevel gear transmission box (2) has a second input shaft (201) and a third output shaft (202), wherein the first output shaft (102) and the second input shaft (201) are arranged opposite to each other and connected via a universal shaft. The second output shaft (103) is connected to the first bevel gear reduction box (4) below by driving connection, and the output shaft of the first bevel gear reduction box (4) is connected to the first screw mechanism (5) on the side by driving connection; the third output shaft (202) is connected to the second bevel gear reduction box (6) below by driving connection, and the output shaft of the second bevel gear reduction box (6) is connected to the second screw mechanism (7) on the side by driving connection; the first screw mechanism (5) and the second screw mechanism (7) have the same rotation direction.

2. The linear drive mechanism according to claim 1, characterized in that: The universal joint (3) comprises a long drive shaft (301), and ear shafts (302) are fixed at both ends of the long drive shaft (301), one of the ear shafts (302) is connected to the first output shaft (102) through a pin (303), and the other ear shaft (302) is connected to the second input shaft (201) through a pin (303).

3. The linear drive mechanism according to claim 1, characterized in that: The second output shaft (103) is connected to the first bevel gear reduction box (4) via a short drive shaft (8), and the third output shaft (202) is connected to the second bevel gear reduction box (6) via a short drive shaft (8), and the two short drive shafts (8) are parallel to each other.

4. The linear drive mechanism according to claim 1, characterized in that: The first screw mechanism (5) comprises a first screw (501), one end of which is connected to the output shaft of the first bevel gear reducer (4), and the other end of which is used to connect to a driving object; the first screw (501) has a first shaft shoulder (502), and the first inner valve seat (503) and the first outer shaft sleeve (504) which are sleeved on the first screw (501) are respectively arranged on the inner and outer sides of the first shaft shoulder (502); the first inner valve seat (503) and the first outer shaft sleeve (504) are used to limit the movement of the first shaft shoulder (502) in the length direction.

5. The linear drive mechanism according to claim 4, characterized in that: The end of the first screw rod (501) close to the driven object has a T-shaped thread, and a first nut (505) is engaged on the T-shaped thread. The first nut (505) is fixedly connected to the driven object.

6. The linear drive mechanism according to claim 1, characterized in that: The second screw mechanism (7) comprises a second screw (701), one end of which is connected to the output shaft of the second bevel gear reducer (6), and the other end of which is used to connect to a driving object; the second screw (701) has a second shaft shoulder (702), and the inner and outer sides of the second shaft shoulder (702) are respectively provided with a second inner valve seat (703) and a second outer shaft sleeve (704) which are sleeved on the second screw (701); the second inner valve seat (703) and the second outer shaft sleeve (704) are used to limit the movement of the second shaft shoulder (702) in the length direction.

7. The linear drive mechanism according to claim 6, characterized in that: The end of the second screw rod (701) close to the driven object has a T-shaped thread, and a second nut (705) is engaged on the T-shaped thread. The second nut (705) is fixedly connected to the driven object.

8. A cone valve, comprising a valve body, a valve core, a sleeve gate (9) and a water inlet pipe (10), characterized in that: It also includes the linear drive mechanism described in any one of claims 1 to 7; the T-type one-inlet and two-outlet bevel gear transmission box (1), the L-type one-inlet and one-outlet bevel gear transmission box (2), the first bevel gear reduction box (4) and the second bevel gear reduction box (6) are all fixed on the water inlet pipe (10), and the first screw mechanism (5) and the second screw mechanism (7) are both drivingly connected to the sleeve gate (9).

9. The cone valve according to claim 8, characterized in that: The T-type one-inlet two-outlet bevel gear transmission box (1) is fixed to the water inlet pipe (10) via a first transmission box support (11), and the L-type one-inlet one-outlet bevel gear transmission box (2) is fixed to the water inlet pipe (10) via a second transmission box support (12); the first bevel gear reduction box (4) is fixed to the water inlet pipe (10) via a first reduction box support (13), and the second bevel gear reduction box (6) is fixed to the water inlet pipe (10) via a second reduction box support (14).

10. The cone valve according to claim 9, characterized in that: A first inner valve seat (503) is embedded in the first reduction gearbox support (13), and a first outer shaft sleeve (504) is embedded in the water inlet pipe (10); the first inner valve seat (503) and the first outer shaft sleeve (504) are in contact with each other and form a limiting groove for embedding the first shaft shoulder (502); a second inner valve seat (703) is embedded in the second reduction gearbox support (14), and a second outer shaft sleeve (704) is embedded in the water inlet pipe (10); the second inner valve seat (703) and the second outer shaft sleeve (704) are in contact with each other and form a limiting groove for accommodating the second shaft shoulder (702).

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