Liquid return valve for hydraulic system

Abstract

The utility model belongs to the technical field of liquid return valves, and particularly relates to a liquid return valve for a hydraulic system, which comprises a valve body, the valve body comprises a cavity column and a base which are sequentially in flange connection from top to bottom, a pressure sensor is fixedly mounted at the top end of the inner wall of the cavity column, and the pressure sensor is connected with a heavy hammer which is slidably connected into the cavity column through a spring. A valve rod is fixedly connected to the center of the bottom end of the heavy hammer through a bolt, the bottom end of the valve rod penetrates through the baffle to extend to a valve connector in the base, a valve clack is fixedly installed at the bottom end of the valve rod, located at the valve connector and covers the top end of the connector close to the water inlet end, and a pressure sensor is fixedly installed at the top end of the inner wall of the cavity column. The internal pressure of the water pipe is measured through the pressure sensor, loss of the valve rod is reduced through sliding connection of the ball, and safety and economical efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid return valves, in particular to a liquid return valve for a hydraulic system. Background Art

[0002] The safety reflux valve is a special form of pressure reducing device. It consists of a throttling device and a connecting pipe system. When the valve is opened, the fluid pressure decreases and the flow through the pipe system decreases; when the valve is closed, as the outlet pressure increases, the flow through the pipe system increases, causing the outlet pressure to increase accordingly. In this way, the purpose of pressure reduction is achieved by adjusting the flow rate that is adapted to the outlet pressure to control the flow of the fluid in the opposite direction to the above.

[0003] In the prior art, the invention patent with the authorization publication number CN113565727A discloses a hydraulic system. It includes a main pump, a pilot pump, and a circulating gear pump. The circulating gear pump is arranged between the main pump and the pilot pump. The driving gear shaft of the circulating gear pump is respectively connected to the main pump and the pilot pump. The circulating gear pump includes a pump body and a pump cover, mutually meshing master and slave gears arranged in the inner cavity of the pump body, and master and slave gear shafts respectively connected to the master and slave gears. The circulating gear pump also includes a force balancing device. The hydraulic system can avoid high temperature failure of hydraulic oil on the basis of solving the problem of oil return leakage.

[0004] It takes into account the influence of oil temperature on the hydraulic system, but most hydraulic systems will have excessive internal pressure causing the tank to rupture. In response to the above problems, a return valve for the hydraulic system is designed to enhance safety and improve efficiency. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a liquid return valve for a hydraulic system.

[0006] In the first aspect, the present application provides a return valve for a hydraulic system, including a valve body, the valve body including a cavity column and a base which are flange-connected in sequence from top to bottom, a pressure sensor being fixedly installed on the top of the inner wall of the cavity column, the pressure sensor being connected to a weight which is slidably connected to the inside of the cavity column through a spring, a valve stem being fixedly connected to the center of the bottom end of the weight by bolts, the bottom end of the valve stem extending through a baffle to a valve interface inside the base, a valve flap being fixedly installed on the bottom end of the valve stem, the valve flap being located at the valve interface and covering the top of the interface near the water inlet end.

[0007] According to the technical solution provided in the embodiment of the present application, the weight is cylindrical, the cavity column is cylindrical, and the radius of the weight is less than or equal to the radius of the cavity column, thereby avoiding the problem that the weight cannot be sleeved inside the cavity column, causing disadvantages.

[0008] According to the technical solution provided in the embodiment of the present application, a convex strip is integrally formed on the arc side wall of the weight, and a sliding groove is provided on the inner wall of the cavity column to accommodate the up and down sliding of the convex strip, thereby improving the sliding efficiency of the weight on the inner wall of the sliding groove, and also preventing the weight from rotating inside the cavity column and causing damage to the spring.

[0009] According to the technical solution provided in the embodiment of the present application, when the valve flap is located at the water inlet interface, the spring is in its original length state, the pressure sensor is electrically connected to a display screen via an external wire, and the display screen is embedded in the top surface of the cavity column.

[0010] According to the technical solution provided in the embodiment of the present application, when the valve flap is located at the water inlet interface, the distance between the top surface of the valve flap and the baffle is 3-5 cm, which avoids the situation where the valve flap is stuck by the baffle and cannot move up and down when the water pipe pressure is too high, causing the water pipe to rupture and increasing safety hazards.

[0011] According to the technical solution provided in the embodiment of the present application, the baffle is in the shape of a round cake as a whole, and the baffle is welded to the bottom end of the cylindrical inner wall of the base. A circular hole is opened in the center of the baffle, and sealing rubber rings are respectively installed at both ends of the circular hole.

[0012] According to the technical solution provided in the embodiment of the present application, a plurality of balls are installed inside the circular hole, and the plurality of balls are tightly fitted and slide on the valve stem. The circular hole is connected to the two ends of the valve stem through a sealing rubber ring, and the valve stem is driven up and down by the rotation of the balls, thereby reducing friction loss.

[0013] According to the technical solution provided in the embodiment of the present application, the bottom end of the valve flap is arc-shaped, the cross-sectional size of the valve flap is larger than the interface size of the valve interface close to the water inlet end, and a layer of rubber is covered on the surface of the valve flap to increase the resistance caused by water pressure and avoid excessive pressure in the water pipe. The valve flap is still not squeezed to move upward, thereby causing the water pipe to rupture and posing a safety hazard.

[0014] To summarize, the present technical solution specifically discloses a liquid return valve for a hydraulic system, which comprises a valve body, a spring connected through a pressure sensor arranged at the top of a hollow column at the upper end of the valve body, and the other end of the spring is connected to the top of a weight, and a valve stem is connected through the weight, the valve stem extends through a baffle to a water pipe interface and is connected to a valve disc, and the valve disc closes the interface through the weight of the weight, and when the return water pressure increases, the valve stem is driven to move upward, causing the weight to rise and the spring to compress, and the pressure is obtained by reading a display used in conjunction with the pressure sensor, and a number of balls are provided inside the circular hole of the baffle to improve the sliding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the vertically cut structure in the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the heavy hammer in the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the utility model hollow cavity column;

[0020] Figure 5 It is a structural schematic diagram of the baffle in the utility model;

[0021] Figure 6 It is a structural schematic diagram of a vertical section of the middle baffle of the utility model.

[0022] In the figure: 1. valve body; 11. cavity column; 111. slide groove; 12. base; 2. spring; 3. weight; 31. convex strip; 4. valve stem; 5. valve disc; 6. baffle; 61. round hole; 7. ball; 8. sealing rubber ring; 9. pressure sensor; 10. display screen. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] See also Figure 1-Figure 6A liquid return valve for a hydraulic system includes a valve body 1, which includes a cavity column 11 and a base 12 which are flange-connected in sequence from top to bottom. A pressure sensor 9 is fixedly installed on the top of the inner wall of the cavity column 11. The pressure sensor 9 is connected to a weight 3 which is slidably connected to the inside of the cavity column 11 through a spring 2. Specifically, the weight 3 is cylindrical, and the cavity column 11 is cylindrical. The outer diameter of the weight 3 is less than or equal to the inner diameter of the cavity column 11 to avoid the weight 3 being unable to be inserted into the inside of the cavity column 11 and keep sliding. A valve stem 4 is fixedly connected to the center of the bottom end of the weight 3 by bolts. The bottom end of the valve stem 4 extends through a baffle 6 to the valve interface inside the base 12. A valve flap 5 is fixedly installed on the bottom end of the valve stem 4. The valve flap 5 is located at the valve interface and covers the top of the interface near the water inlet end.

[0026] Specifically, a convex strip 31 is integrally formed on the arc side wall of the weight 3, and a sliding groove 111 is opened on the inner wall of the cavity column 11 to accommodate the up and down sliding of the convex strip 31. The convex strip 31 has the same shape as the sliding groove 111 and is arc-shaped, which improves the sliding efficiency of the weight 3 on the inner wall of the sliding groove 111, and also prevents the weight 3 from rotating inside the cavity column 11 and causing damage to the spring 2.

[0027] Specifically, when the valve disc 5 is located at the water inlet interface, the spring 2 is in its original length state, the pressure sensor 9 is electrically connected to the display screen 10 through an external wire, and the display screen 10 is embedded in the top surface of the cavity column 11. By measuring the weight of the weight 3, the valve stem 4, etc. in advance and then observing the numbers on the display screen 10, the water pressure can be roughly measured, thereby improving the versatility of the valve.

[0028] Specifically, when the valve flap 5 is located at the water inlet interface, the distance between the top surface of the valve flap 5 and the baffle 6 is 3-5 cm, which avoids the valve flap 5 and the baffle 6 being stuck and unable to move, resulting in excessive internal water pressure and damage to the water pipe.

[0029] Specifically, the baffle 6 is in the shape of a round cake as a whole and is welded to the bottom end of the cylindrical inner wall of the base 12. A circular hole 61 is opened at the center of the baffle 6. Sealing rubber rings 8 are installed at both end openings of the circular hole 61. The sealing rubber ring 8 can prevent water from entering the cavity column 11 due to excessive water pressure.

[0030] Specifically, a plurality of balls 7 are installed in a ring shape inside the circular hole 61 between the two sealing rubber rings 8 . The balls 7 fit tightly with and slide on the valve stem 4 . The balls 7 reduce friction loss during the up and down movement of the valve stem 4 .

[0031] In addition, the bottom end of the valve flap 5 is arc-shaped, and the cross-sectional size of the valve flap 5 is larger than the interface size of the valve interface near the water inlet end. A layer of rubber is covered on the surface of the valve flap 5 to prevent excessive pressure in the water pipe, while the valve flap 5 is still not squeezed to move upward, thereby causing the water pipe to rupture and posing a safety hazard.

[0032] Specifically, the spring 2 adopts a rigid spring structure to improve the toughness of the spring 2.

[0033] Specifically, the pressure sensor 9 and the display screen 10 are connected via a wire and transmit data.

[0034] Finally, it should be noted that the pressure sensor 9, display screen 10 and other components involved in the utility model are all universal standard parts or components known to technical personnel in this field, and their structures and principles are all known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adaptive controllers and power supplies, are connected through wires. The specific connection means should refer to the working principle of the utility model. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection means are all well-known technologies in the field.

[0035] Working principle: connect the two ends of the return valve to the two ends of the water pipe respectively, block the water inlet port through the valve disc 5, and the valve disc 5 is connected to the weight 3 through the valve stem 4 so that the water pressure needs to reach a certain peak value to make the valve disc 5 be lifted, so that the water flows back to be discharged from the water outlet. A spring 2 is installed on the upper end of the weight 3, and the spring 2 plays a buffering role for the weight 3. A baffle 6 is installed above the valve disc 5, and a sealing rubber ring 8 is sleeved on the baffle 6 to prevent water from entering the cavity column 11. A ball 7 is provided between the valve stem 4 and the baffle 6. The ball 7 is used to reduce wear and tear, thereby improving the use efficiency. The pressure value can be clearly seen through the pressure sensor 9 on the spring 2 and the display screen 10 connected by the wire, so that the pressure can be controlled and the pipe body can be avoided from being damaged because the user does not understand the internal pressure during use.

[0036] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

Claims

1. A liquid return valve for a hydraulic system, characterized in that: The invention comprises a valve body (1), wherein the valve body (1) comprises a cavity column (11) and a base (12) which are flange-connected in sequence from top to bottom, a pressure sensor (9) is fixedly installed at the top of the inner wall of the cavity column (11), the pressure sensor (9) is connected to a weight (3) which is slidably connected to the inside of the cavity column (11) via a spring (2), a valve stem (4) is fixedly connected to the center of the bottom end of the weight (3) via bolts, the bottom end of the valve stem (4) passes through a baffle (6) and extends to the valve interface inside the base (12), a valve flap (5) is fixedly installed at the bottom end of the valve stem (4), and the valve flap (5) is located at the valve interface and covers the top of the interface close to the water inlet end.

2. The liquid return valve for a hydraulic system according to claim 1, characterized in that: The weight (3) is cylindrical, the cavity column (11) is cylindrical, and the outer diameter of the weight (3) is less than or equal to the inner diameter of the cavity column (11).

3. The liquid return valve for a hydraulic system according to claim 1, characterized in that: A convex strip (31) is integrally formed on the arc side wall of the weight (3), and a sliding groove (111) for accommodating the convex strip (31) to slide up and down is provided on the inner side wall of the cavity column (11).

4. The liquid return valve for a hydraulic system according to claim 1, characterized in that: When the valve flap (5) is located at the water inlet interface, the spring (2) is in its original length state, the pressure sensor (9) is electrically connected to a display screen (10) via an external wire, and the display screen (10) is embedded in the top surface of the cavity column (11).

5. The liquid return valve for a hydraulic system according to claim 1, characterized in that: When the valve flap (5) is located at the water inlet interface, the distance between the top surface of the valve flap (5) and the baffle (6) is 3-5 cm.

6. The liquid return valve for a hydraulic system according to claim 1, characterized in that: The baffle (6) is in the shape of a round pancake as a whole. The baffle (6) is welded to the bottom end of the cylindrical inner wall of the base (12). A round hole (61) is opened at the center of the baffle (6). Sealing rubber rings (8) are installed at both end openings of the round hole (61).

7. The liquid return valve for a hydraulic system according to claim 6, characterized in that: A plurality of balls (7) are installed in a ring shape inside the circular hole (61) between the two sealing rubber rings (8), and the plurality of balls (7) are tightly fitted and slide on the valve stem (4).

8. The liquid return valve for a hydraulic system according to claim 1, characterized in that: The bottom end of the valve flap (5) is in an arc shape, the cross-sectional dimension of the valve flap (5) is larger than the interface dimension of the valve interface close to the water inlet end, and the surface of the valve flap (5) is covered with a layer of rubber.

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