Cartridge valve with opening degree limiting and speed regulating functions

Abstract

The utility model relates to the technical field of hydraulic pressure, in particular to a cartridge valve with an opening degree limiting and speed regulating function. The cartridge valve comprises a lower valve body, an upper valve body, a valve element and a spring, the lower valve body is installed on an integrated block of a hydraulic pump, a main oil port is formed in the lower valve body, a plurality of oil outlets are evenly distributed in the lower side of the lower valve body in the circumferential direction, the upper valve body is fixedly installed on the top of the lower valve body, and the valve element is fixedly installed on the upper valve body. A valve element is slidably connected into the lower valve body, the initial position of the valve element can block all the oil outlets, and a spring is connected between the valve element and the interior of the lower valve body. The position of the adjusting rod can be accurately adjusted through the adjusting assembly (the threaded disc, the rotary knob and the internal thread), then the sliding height of the valve element is limited, the opening degree of the oil outlet is controlled, accurate control over the flow of oil entering the executing mechanism is achieved, the movement speed of the executing mechanism is accurately adjusted, and the requirements of different working conditions are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic technology field especially relates to a kind of plug-in valve with opening degree limit speed function. BACKGROUND

[0002] In industrial production, many hydraulic equipment need to accurately control the speed of actuator to meet different process requirements. For example, in injection molding machine, injection process needs to accurately control injection speed and pressure to ensure the quality and dimensional accuracy of plastic products; in machine tool processing, the feed speed of workbench needs to be accurately adjusted according to the processing material and process requirements. However, the opening degree adjustment mode of traditional plug-in valve is not accurate enough, and it is often difficult to realize accurate control of the speed of actuator. The opening and closing of the valve core mainly depend on the balance of simple spring force and hydraulic pressure, and it is difficult to finely adjust the opening degree according to the actual working condition.

[0003] In addition, the existing plug-in valve cannot flexibly change the opening degree of the oil outlet when facing complex working conditions, resulting in unstable oil flow into the actuator, so that the movement speed of the actuator fluctuates greatly. This not only affects the working efficiency of the equipment, but also may cause the product quality to decline and increase the production cost. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings, the technical problem: to provide a kind of plug-in valve with opening degree limit speed function.

[0005] Technical scheme: a kind of plug-in valve with opening degree limit speed function, including lower valve body, upper valve body, valve core and spring, lower valve body is installed on the integrated block of hydraulic pump, its inside is equipped with main oil port, the lower side of lower valve body is evenly distributed with multiple oil outlets along the circumferential direction, lower valve body top is fixedly installed with upper valve body, lower valve body is slidably connected with valve core, the initial position of valve core can block each oil outlet, spring is connected between valve core and lower valve body inside, further including adjusting rod and adjusting assembly, the upper side of lower valve body is equipped with through sliding channel, adjusting rod is slidably connected with lower valve body by the channel, and adjusting rod is located on the outside of spring, the lower end of adjusting rod is in contact with valve core, adjusting assembly is arranged on upper valve body.

[0006] As a preferred technical scheme of the utility model, lower valve body and upper valve body are made of high-strength alloy steel material.

[0007] As a preferred technical scheme of the utility model, the valve core is cylindrical, and its surface is processed by high-precision grinding.

[0008] As a preferred technical scheme of the utility model, the adjusting assembly comprises a threaded disc, a knob and an internal thread, corresponding internal threads are processed on the left and right side walls of the lower side of the upper valve body, the top of the adjusting rod is connected with the threaded disc matched with the internal thread, and the top of the threaded disc is connected with the knob.

[0009] As a preferred technical scheme of the utility model, the adjusting assembly comprises a threaded disc, a knob and an internal thread, corresponding internal threads are processed on the left and right side walls of the lower side of the upper valve body, the top of the adjusting rod is connected with the threaded disc matched with the internal thread, and the top of the threaded disc is connected with the knob.

[0010] As a preferred technical scheme of the utility model, the adjusting assembly comprises a threaded disc, a knob and an internal thread, corresponding internal threads are processed on the left and right side walls of the lower side of the upper valve body, the top of the adjusting rod is connected with the threaded disc matched with the internal thread, and the top of the threaded disc is connected with the knob.

[0011] Beneficial effects: 1, through the adjusting assembly (threaded disc, knob and internal thread) can accurately adjust the position of the adjusting rod, and then limit the sliding height of the valve core, control the opening of the oil outlet, realize the accurate control to the oil flow of the entering execution mechanism, thereby accurately adjust the movement speed of the execution mechanism, meet the demand of different working conditions.

[0012] 2, the setting of the limiting ring and the scale ruler makes the height data of the adjusting rod be known when the height of the adjusting rod is adjusted by checking the position of the limiting ring on the scale ruler, provides an intuitive reference for the operator, is convenient for accurate adjustment, and improves the accuracy and convenience of operation.

[0013] 3, the combination of the fixed ring, the threaded ring and the filter screen can filter the oil, block the impurities in the oil, avoid the impurities entering the execution mechanism, reduce the abrasion of the execution mechanism, ensure the normal operation of the execution mechanism, improve the stability and reliability of the whole hydraulic system when the oil is injected into the main oil port of the lower valve body by the hydraulic pump. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic view of the utility model.

[0015] Figure 2 It is the sectional view of the lower valve body, the upper valve body and the fixed ring component of the utility model.

[0016] Figure 3 It is the sectional view of the lower valve body and the upper valve body component of the utility model.

[0017] Figure 4 It is the sectional view of the threaded disc and the knob component of the utility model.

[0018] The markings in the attached diagram are: 1_lower valve body, 101_oil outlet, 2_upper valve body, 3_valve core, 4_spring, 5_adjusting rod, 6_threaded disc, 7_knob, 8_internal thread, 10_limit ring, 11_scale, 12_fixed ring, 13_threaded ring, 14_filter screen. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0020] Example: A cartridge valve with opening limit and speed regulation function, such as Figures 1-4 As shown, the device includes a lower valve body 1, an upper valve body 2, a valve core 3, a spring 4, an adjusting rod 5, and an adjusting assembly. The lower valve body 1 is mounted on the integrated block of the hydraulic pump and has a main oil port inside for connecting the hydraulic pump output oil. Multiple oil outlets 101 are evenly distributed along the circumference of the lower valve body 1, and these oil outlets 101 are connected to the actuator. The upper valve body 2 is fixedly mounted on the top of the lower valve body 1. Together, they constitute the main structure of the cartridge valve. Both the lower valve body 1 and the upper valve body 2 are made of high-strength alloy steel, possessing excellent pressure resistance and wear resistance. The valve core 3 is slidably connected inside the lower valve body 1. The initial position of the valve core 3 can block each oil outlet 101 to control the flow of oil. The valve core 3 is cylindrical. Its surface is processed by high-precision grinding to ensure good sealing and sliding performance. A spring 4 is connected between the valve core 3 and the lower valve body 1. The function of the spring 4 is to provide a restoring force for the valve core 3. When the oil pressure of the main oil port in the lower valve body 1 acts on the valve core 3, the valve core 3 can overcome the force of the spring 4 and slide upward, thereby opening the oil outlet 101 and allowing the oil to flow out. The upper side of the lower valve body 1 is provided with a through sliding channel. The adjusting rod 5 is slidably connected to the lower valve body 1 through the channel, and the adjusting rod 5 is located outside the spring 4. The lower end of the adjusting rod 5 abuts against the valve core 3. By adjusting the position of the adjusting rod 5, the sliding height of the valve core 3 can be limited, thereby controlling the opening of the oil outlet 101. An adjusting component is provided on the upper valve body 2.

[0021] like Figures 1-4 As shown, the adjustment assembly includes a threaded disc 6, a knob 7, and an internal thread 8. The left and right sidewalls of the lower inner side of the upper valve body 2 are machined with corresponding internal threads 8. The top of the adjustment rod 5 is connected to the threaded disc 6 that matches the internal thread 8. The top of the threaded disc 6 is welded with a knob 7. By rotating the knob 7, the threaded disc 6 and the adjustment rod 5 can be rotated. Due to the cooperation between the threaded disc 6 and the internal thread 8, the adjustment rod 5 can move up and down in the axial direction, thereby achieving precise adjustment of the sliding height of the valve core 3.

[0022] When the hydraulic pump output oil into the cartridge valve main oil port, the oil pressure acts on the valve core 3, push the valve core 3 to move up, and then compress the spring 4, the movement of the valve core 3 changes its relative position with the oil outlet 101, thereby adjusting the opening degree of the oil outlet 101, the change of the opening degree of the oil outlet 101 controls the oil flow into the actuator, and then realizes the control of the movement speed of the actuator, the movement of the valve core 3 is limited by the adjusting rod 5. When it is necessary to adjust the slidable height of the valve core 3, the knob 7 is rotated, the knob 7 drives the threaded disc 6 to rotate with the adjusting rod 5, and through the cooperation of the threaded disc 6 and the internal thread 8, the threaded disc 6 and the adjusting rod 5 move at the same time of rotating, the distance between the adjusting rod 5 and the valve core 3 determines the movable range of the valve core 3, when the distance is small, the valve core 3 can only move in a small stroke range, the opening degree of the oil outlet 101 changes little, the oil flow is small, and slow injection of the actuator is realized; when the distance is large, the valve core 3 can move in a larger stroke range, the opening degree of the oil outlet 101 changes greatly, the oil flow increases, and fast injection is realized.

[0023] As shown in Figures 1-4 It also includes a limiting ring 10 and a scale 11, the threaded disc 6 is rotatably connected with the limiting ring 10 at the bottom, the limiting ring 10 is slidably connected with the outer side of the upper valve body 2, and the left and right side walls of the lower part of the upper valve body 2 are respectively welded with the scale 11. The limiting ring 10 is located outside the scale 11. When the height of the adjusting rod 5 is adjusted, the limiting ring 10 moves with the threaded disc 6, and by checking the corresponding position scale of the limiting ring 10 on the scale 11, the height data of the adjusting rod 5 can be obtained intuitively and accurately, so as to realize the accurate adjustment of the sliding height of the valve core 3.

[0024] As shown in Figure 2 It also includes a fixed ring 12, a threaded ring 13 and a filter screen 14, the fixed ring 12 is welded at the bottom of the lower valve body 1, the threaded ring 13 is threadedly connected with the inner side of the fixed ring 12, and the filter screen 14 made of stainless steel is connected with the inner side of the threaded ring 13. When the hydraulic pump injects oil into the main oil port of the lower valve body 1, the filter screen 14 can effectively filter the oil, intercept the impurity particles mixed in the oil, prevent them from entering the subsequent actuator, and avoid problems such as wear, jamming and even damage of the actuator caused by impurities. When the cartridge valve is maintained, the threaded ring 13 and the filter screen 14 can be easily detached from the inner side of the fixed ring 12 by rotating the threaded ring 13, so as to facilitate cleaning or replacement of the filter screen 14.

[0025] While the disclosure has been illustrated and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the disclosure should not be limited to the embodiments described herein but should be accorded the full scope of the appended claims and their equivalents.

Claims

1. A cartridge valve with opening limit and speed regulation function, comprising a lower valve body (1), an upper valve body (2), a valve core (3), and a spring (4), wherein the lower valve body (1) is mounted on the integrated block of the hydraulic pump and has a main oil port inside; multiple oil outlets (101) are evenly distributed along the circumferential direction on the lower side of the lower valve body (1); the upper valve body (2) is fixedly mounted on the top of the lower valve body (1); the valve core (3) is slidably connected inside the lower valve body (1); the initial position of the valve core (3) can block each oil outlet (101); and a spring (4) is connected between the valve core (3) and the interior of the lower valve body (1). The valve core (3) is characterized by the following: It also includes an adjusting rod (5) and an adjusting assembly. The upper side of the lower valve body (1) is provided with a through sliding channel. The adjusting rod (5) is slidably connected to the lower valve body (1) through the channel. The adjusting rod (5) is located outside the spring (4). The lower end of the adjusting rod (5) abuts against the valve core (3). The upper valve body (2) is provided with an adjusting assembly.

2. A cartridge valve with opening limit and speed regulation function according to claim 1, characterized in that: Both the lower valve body (1) and the upper valve body (2) are made of high-strength alloy steel.

3. A cartridge valve with opening limit and speed regulation function according to claim 2, characterized in that: The valve core (3) is cylindrical and its surface is processed by high-precision grinding.

4. A cartridge valve with opening limit and speed regulation function according to claim 3, characterized in that: The adjustment assembly includes a threaded disc (6), a knob (7) and an internal thread (8). The left and right side walls of the lower inner side of the upper valve body (2) are machined with corresponding internal threads (8). The top of the adjustment rod (5) is connected to a threaded disc (6) that matches the internal thread (8), and the top of the threaded disc (6) is connected to a knob (7).

5. A cartridge valve with opening limit and speed regulation function according to claim 4, characterized in that: It also includes a limit ring (10) and a scale (11). The bottom of the threaded disc (6) is rotatably connected to the limit ring (10). The limit ring (10) is slidably connected to the outside of the upper valve body (2). The lower left and right side walls of the upper valve body (2) are respectively connected to the scale (11). The limit ring (10) is located outside the scale (11).

6. A cartridge valve with opening limit and speed regulation function according to claim 5, characterized in that: It also includes a fixed ring (12), a threaded ring (13) and a filter screen (14). The bottom of the lower valve body (1) is connected to the fixed ring (12), the inner side of the fixed ring (12) is threaded to the threaded ring (13), and the inner side of the threaded ring (13) is connected to the filter screen (14).

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