A low-resistance constant current dual-cylinder filter

Abstract

This utility model discloses a low-resistance constant-flow dual-cylinder filter, characterized by a synchronous drive mechanism for simultaneously driving switching valve one and switching valve two to operate and reducing the resistance when driving switching valves one and two. The synchronous drive mechanism includes a worm gear box connected to the valve stems of switching valves one and two to synchronously drive their operation. The worm gear box contains a worm wheel that is driven by the valve stem to rotate, a worm that cooperates with the worm wheel to rotate it, and a handwheel installed at one end of the worm for easy rotation. This utility model uses the worm gear box to drive the valve stem to rotate, synchronously driving switching valves one and two to switch. By employing a worm gear transmission method to drive the valve stem to rotate, the resistance encountered by the operator when driving the valve stem is reduced, avoiding difficulties in timely switching due to excessive resistance in emergency situations.

Description

Technical Field

[0001] This utility model relates to filters, specifically a low-resistance constant-flow dual-cylinder filter. Background Technology

[0002] The existing hydraulic system's dual-cylinder filter includes two filters, one for standby and one for use, and a switching valve for switching between the two filters. In the existing technology, many switching valves are directly equipped with a handwheel at the upper end of the valve stem. When switching, the handwheel is manually turned to drive the valve stem to rotate, which in turn drives the valve core to rotate. However, this method has high resistance when switching. If the filter needs to be switched immediately in an emergency, it is easy to make it difficult to switch in time due to excessive resistance. Furthermore, in existing technologies, the switching valve causes fluctuations in medium pressure or even flow interruption due to changes in the medium flow path when switching filters. If a flow interruption occurs, the hydraulic oil supply to subsequent equipment will be interrupted, affecting the normal operation of those devices. Therefore, a low-resistance constant-flow dual-cylinder filter is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a low-resistance constant-flow dual-cylinder filter to solve the above problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-resistance constant-flow dual-cylinder filter, comprising two filters, one for standby and one for use, an inlet and an outlet disposed on the filter, a switching valve one connecting the two filter inlets, and a switching valve two connecting the two filter outlets; characterized in that it further comprises a synchronous drive mechanism for synchronously driving the switching valve one and the switching valve two to operate and reducing the resistance when driving the switching valve one and the switching valve two, the synchronous drive mechanism comprising a worm gear box connected to the valve stems of the switching valve one and the switching valve two to synchronously drive the switching valve one and the switching valve two to operate, the worm gear box being provided with a worm wheel that is driven by the valve stem to drive the valve stem to rotate, a worm that cooperates with the worm wheel to drive the worm wheel to rotate, and a handwheel installed at one end of the worm to facilitate the rotation of the worm.

[0005] More preferably, both the switching valve one and the switching valve two are ball valves, with one end of the valve stem connected to the worm gear drive and the other end connected to the valve core inside the ball valve.

[0006] More preferably, the valve core is provided with a valve chamber that is set at a right angle to prevent flow interruption or pressure fluctuation during the switching process of switching valve one and switching valve two.

[0007] Further preferably, it also includes an exhaust port located above the filter and a drain port located below the filter.

[0008] A further preferred embodiment includes a second drain connector located at the filter outlet.

[0009] Further preferably, the device also includes a detection connector installed on switching valve one and switching valve two, and the detection connector is connected to a pressure detector for detecting the inlet and outlet pressures via a pipeline.

[0010] The beneficial effects of this utility model are as follows: By connecting the valve stems of switching valve one and switching valve two to the worm gear box, the valve stems are driven to rotate by the worm gear box, which in turn drives switching valve one and switching valve two to perform switching actions. By using the worm gear transmission method to drive the valve stems to rotate, the resistance when the operator drives the valve stems to rotate is reduced, and the difficulty in switching in time due to excessive resistance is avoided when switching is required in an emergency. By setting a valve cavity at a right angle on the valve core, when switching by rotating the valve core, the medium flow path between one valve cavity and the pipeline is gradually cut off during the rotation of the valve core, while the medium flow path between the valve cavity and the pipeline on the other side is opened during the rotation. One side gradually closes while the other side gradually opens, thus avoiding the phenomenon of medium interruption during switching. At the same time, the size of the medium flow path does not change due to the synchronous action of both sides, so there is no medium pressure fluctuation during switching, thus achieving constant flow switching. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the valve core and valve stem in this utility model; Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0012] Legend: 1. Filter; 11. Inlet; 12. Outlet; 2. Switching valve one; 3. Switching valve two; 4. Synchronous drive mechanism; 41. Worm gear box; 5. Valve stem; 51. Worm gear; 52. Worm; 53. Handwheel; 6. Valve core; 61. Valve chamber; 7. Exhaust connector; 71. Drain connector one; 72. Drain connector two; 8. Detection connector; 9. Pressure detector. Detailed Implementation

[0013] The low-resistance constant-flow dual-cylinder filter of this utility model will be further described below with reference to the accompanying drawings.

[0014] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0015] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] See Figures 1-4 As shown, a low-resistance constant-flow dual-cylinder filter 1 includes two filters 1, one for standby and one for use, an inlet 11 and an outlet 12 disposed on the filter 1, a switching valve 2 connecting the inlets 11 of the two filters 1, and a switching valve 3 connecting the outlets 12 of the two filters 1; characterized in that it also includes a synchronous drive mechanism 4 for synchronously driving the switching valve 2 and the switching valve 3 to operate and reducing the resistance when driving the switching valve 2 and the switching valve 3. The synchronous drive mechanism 4 includes a worm gear box 41 connected to the valve stems 5 on the switching valve 2 and the switching valve 3 to synchronously drive the switching valve 2 and the switching valve 3 to operate. The worm gear box 41 is provided with a worm wheel 51 that is driven by the valve stem 5 to drive the valve stem 5 to rotate, a worm 52 that cooperates with the worm wheel 51 to drive the worm wheel 51 to rotate, and a handwheel 53 installed at one end of the worm 52 to facilitate the rotation of the worm 52. By connecting the valve stems 5 of switching valve 1 (2) and switching valve 2 (3) to the worm gear box 41, the valve stems 5 are rotated by the worm gear box 41, which in turn drives switching valve 1 (2) and switching valve 2 (3) to perform switching actions. By using the worm gear 51 and worm 52 to drive the valve stems 5 to rotate, the resistance when the operator drives the valve stems 5 to rotate is reduced, and the difficulty in switching in time due to excessive resistance is avoided when switching is required in an emergency.

[0017] In one embodiment, both the switching valve 1 2 and the switching valve 2 3 are ball valves. One end of the valve stem 5 is driven to the worm gear 51, and the valve stem 5 and the worm gear 51 are driven to each other through a key and a keyway. The other end is driven to the valve core 6 inside the ball valve. When switching valve 1 (2) and switching valve 2 (3) are switched, the handwheel 53 is turned to drive the worm gear 52 to rotate. During the rotation of the worm gear 52, the worm gear 52 drives the worm wheel 51 to rotate. During the rotation of the worm wheel 51, the valve stem 5 rotates. During the rotation of the valve stem 5, the valve core 6 rotates, thus switching.

[0018] In one embodiment, the valve core 6 is provided with a valve chamber 61 that is set at a right angle to prevent flow interruption or pressure fluctuation during the switching process of switching valve 1 2 and switching valve 2 3; By setting a valve cavity 61 at a right angle on the valve core 6, when switching is performed by rotating the valve core 6, the medium flow path between the valve cavity 61 port on one side and the pipeline is gradually cut off during the rotation of the valve core 6, while at the same time the medium flow path between the valve cavity 61 port on the other side and the pipeline is opened during the rotation. One side gradually closes while the other side gradually opens, thereby avoiding the phenomenon of medium interruption during the switching process. At the same time, the two sides act synchronously, and the size of the medium flow path does not change, thus preventing medium pressure fluctuations during the switching process and achieving constant flow switching.

[0019] In one embodiment, the filter 1 is further provided with an exhaust connector 7 above the filter 1 and a drain connector 71 below the filter 1; the exhaust connector 7 is provided to discharge the gas accumulated inside the filter 1. The drain connector 71 is used to discharge hydraulic oil and impurities from the filter 1. The drain connector is mainly used to discharge hydraulic oil that has not been filtered by the filter element in the filter 1 and impurities that have been filtered by the filter element. In one embodiment, a second drain connector 72 is provided on the outlet 12 of the filter 1. The drain connector 72 is mainly used to discharge the hydraulic oil and impurities temporarily retained in the hydraulic oil after being filtered by the filter element inside the filter 1 at the outlet 12.

[0020] In one embodiment, a detection connector 8 is also provided on the switching valve 1 2 and the switching valve 2 3. The detection connector 8 is connected to a pressure detector 9 for detecting the pressure of the inlet 11 and the outlet 12 via a pipeline. The pressure detector 9 can be a pressure gauge that displays the actual pressure or a pressure detection sensor or pressure transmitter used to detect pressure and transmit it to the automatic control system. The pressure detector 9 includes an inlet 11 pressure detector 9 and an outlet 12 pressure detector 9. By comparing the pressure difference ratio of the inlet 11 pressure and the outlet 12 pressure with a standard pressure difference ratio, it is determined whether the filter 1 needs maintenance or replacement.

[0021] In use, when the pressure difference ratio between the inlet pressure 11 and the outlet pressure 12 detected by the pressure detector 9 exceeds the set value, it indicates that the filter 1 needs maintenance and replacement. At this time, the filter 1 needs to be switched. During the switching, the operator drives the worm gear 52 to rotate by turning the handwheel 53. During the rotation of the worm gear 52, the worm gear 52 drives the worm wheel 51 to rotate through the worm gear 52 transmission. When the worm wheel 51 rotates, it drives the two valve stems 5 to rotate synchronously. The two valve stems 5 respectively drive the valve cores 6 in the switching valve 1 2 and the switching valve 2 3 to rotate. The valve core 6 drives the valve cavity 61 set at a right angle on the valve core 6 to rotate. During the rotation of the valve cavity 61, the flow path of the hydraulic oil is switched. The hydraulic oil is passed into the other filter 1 for filtration and then flows through the outlet 12 to the switching valve 2 3 and is discharged to the hydraulic oil-using equipment. During the process from the start of the switching to the complete switching, when the flow paths of both filters 1 are open, both filters 1 perform filtration work simultaneously to avoid hydraulic oil interruption during the switching, which would affect the normal operation of the subsequent equipment.

[0022] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. A low-resistance constant-flow dual-cylinder filter, comprising two filters (1) for standby and one for use, an inlet (11) and an outlet (12) disposed on the filter (1), a switching valve (2) connecting the inlets (11) of the two filters (1) and a switching valve (3) connecting the outlets (12) of the two filters (1); characterized in that It also includes a synchronous drive mechanism (4) for synchronously driving the switching valve one (2) and the switching valve two (3) to operate and reducing the resistance when driving the switching valve one (2) and the switching valve two (3). The synchronous drive mechanism (4) includes a worm gear box (41) connected to the valve stem (5) on the switching valve one (2) and the switching valve two (3) to synchronously drive the switching valve one (2) and the switching valve two (3) to operate. The worm gear box (41) is provided with a worm wheel (51) that is connected to the valve stem (5) to drive the valve stem (5) to rotate, a worm (52) that cooperates with the worm wheel (51) to drive the worm wheel (51) to rotate, and a handwheel (53) installed at one end of the worm (52) to facilitate the rotation of the worm (52).

2. The low-resistance constant-flow dual-cylinder filter according to claim 1, characterized in that: Both the switching valve one (2) and the switching valve two (3) are ball valves. One end of the valve stem (5) is connected to the worm gear (51) for transmission, and the other end is connected to the valve core (6) inside the ball valve for transmission.

3. A low-resistance constant-flow dual-cylinder filter according to claim 2, characterized in that: The valve core (6) is provided with a valve chamber (61) that is set at a right angle to prevent the flow interruption or pressure fluctuation of the switching valve one (2) and the switching valve two (3) during the switching process.

4. A low-resistance constant-flow dual-cylinder filter according to claim 1, characterized in that: It also includes an exhaust port (7) located above the filter (1) and a drain port (71) located below it.

5. A low-resistance constant-flow dual-cylinder filter according to claim 1, characterized in that: It also includes a drain connector 2 (72) installed on the outlet (12) of the filter (1).

6. A low-resistance constant-flow dual-cylinder filter according to claim 1, characterized in that: It also includes a detection connector (8) installed on switching valve one (2) and switching valve two (3), and the detection connector (8) is connected to a pressure detector (9) for detecting the pressure of the inlet (11) and outlet (12) via a pipeline.

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