Liquid level control valve

Abstract

The utility model discloses a liquid level control valve, which relates to the technical field of valve equipment and comprises a valve cup, a sliding cavity is arranged on the valve cup in a penetrating manner, and a liquid inlet port and a liquid outlet port which are communicated with the sliding cavity are arranged on the periphery of the valve cup; the valve cup is provided with a valve deck, the valve deck is installed at one end of the sliding cavity, and a control cavity is formed in the side, facing the sliding cavity, of the valve deck. The valve seat is mounted at the other end of the sliding cavity, the valve seat is provided with a liquid passage, and the liquid passage is communicated with the sliding cavity; the outer wall of the valve element is attached to the side wall of the sliding cavity, one end of the valve element is installed in the control cavity through an adjusting part, the other end of the valve element extends to cover the openings of all the liquid flowing ports and blocks the liquid channel, and the adjusting part is used for controlling the valve element to slide along the inner wall of the sliding cavity so as to open the liquid inlet port and / or the liquid outlet port. The liquid level control device is reasonable in design structure, can control and protect the position of the liquid level, and further guarantees the safety of the whole device.

Description

Technical Field

[0001] This utility model relates to the technical field of valve equipment, specifically a liquid level control valve. Background Technology

[0002] Liquid level control valves are important fluid control devices that play a crucial role in various liquid storage tanks, water pools, chemical equipment, etc. They can accurately control the liquid level, prevent overflow or problems caused by excessively low liquid levels, and ensure the normal operation of the equipment.

[0003] In the prior art, the valve cover, spring, pressure sleeve, support ring, U-shaped seal, valve cup, valve core, and valve seat are composed of a valve cover, a spring, a pressure sleeve, a support ring, a U-shaped seal, a valve cup, a valve core, and a valve seat. The valve cover, pressure sleeve, and valve cup are arranged vertically from top to bottom. The pressure sleeve and valve cup are separate and are sealed together. A liquid passage is provided at the valve cup. The valve core can slide along the pressure sleeve and valve cup to control the opening and closing of the liquid passage.

[0004] According to existing technologies, the sealing ring is a one-way seal, which can lead to reverse leakage in actual use. It has poor performance, poor sealing effect, and a large amount of maintenance work. At the same time, the pressure sleeve and valve cup have high requirements for concentricity and other dimensional and positional tolerances during the processing, which is not conducive to mass production. Valves with poor sealing performance have poor control over the liquid level in the system and are prone to danger. Utility Model Content

[0005] 1) Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a liquid level control valve.

[0007] (ii) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a liquid level control valve, comprising a valve cup, characterized in that: a sliding cavity is provided through the valve cup, and a liquid flow port communicating with the sliding cavity is provided on the outer periphery of the valve cup;

[0009] The valve cup is equipped with:

[0010] A valve cover is installed at one end of the sliding cavity, and a control cavity is provided on the side of the valve cover facing the sliding cavity;

[0011] A valve seat is installed at the other end of the sliding cavity, and the valve seat is provided with a liquid passage that communicates with the sliding cavity.

[0012] The valve core has its outer wall attached to the side wall of the sliding cavity. One end of the valve core is installed in the control cavity through an adjusting member, and the other end extends to cover the openings of all liquid flow ports and block the liquid passage. The adjusting member is used to control the valve core to slide along the inner wall of the sliding cavity to open the liquid inlet port and / or liquid outlet port.

[0013] Furthermore, the adjusting member includes:

[0014] A positioning block, which is fixedly connected to the valve cover;

[0015] A spring, the extension and retraction direction of which is parallel to the axial direction of the valve cup, one end of which is sleeved on the positioning block and fixedly connected to the positioning block, and the other end of which is fixedly connected to the valve core.

[0016] Furthermore, the valve cover also includes:

[0017] The connecting part is provided with an array of connecting bolts and a first through hole.

[0018] The fixing part is provided with a control cavity, and the positioning block is fixedly connected to the fixing part;

[0019] The positioning block is provided with a second through hole, and the first through hole, the second through hole and the control cavity are connected.

[0020] Furthermore, the inner wall of the valve cup is coaxially provided with a first receiving groove, and an internal sealing ring is installed in the first receiving groove. The internal sealing ring is sandwiched between the valve cup and the valve core, and the internal sealing ring and the valve cup are fixedly connected.

[0021] Furthermore, the inner wall of the valve cup is coaxially provided with a second receiving groove, and the inner cavity of the second receiving groove is provided with a guide ring. The guide ring is sandwiched between the valve cup and the valve core, and the guide ring and the valve cup are fixedly connected.

[0022] Furthermore, the valve cup is provided with a positioning groove coaxially at the end away from the valve cover;

[0023] The valve seat is coaxially provided with a positioning ring, the positioning groove is used to accommodate the positioning ring, and the inner wall of the positioning ring is provided with an abutment groove that can abut against the side wall of the valve core.

[0024] Furthermore, an external sealing ring is coaxially mounted on the outer wall of the valve cup, and the external sealing ring is fixedly connected to the valve cup.

[0025] (iii) Beneficial effects:

[0026] Compared with existing technologies, this liquid level control valve has the following advantages:

[0027] I. This utility model, by setting a control chamber, can control the position of the valve core, thereby controlling the overall liquid flow direction, ensuring that the liquid level is always within a stable range, and preventing the liquid level from continuing to drop when it reaches the lower limit, which could cause high-pressure gas leakage and accidents.

[0028] Second, this utility model, by setting an integrated valve sleeve and valve cup, facilitates processing, improves the concentricity of installation, adds a guide ring, makes the valve core movement more flexible and accurate, and greatly extends the life of the sealing ring and reduces the failure rate. Attached Figure Description

[0029] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0030] Figure 2 This is a schematic diagram showing the flow direction of liquid A in this utility model;

[0031] Figure 3 This is a schematic diagram of the flow direction of liquid B in this utility model.

[0032] In the diagram: 1. Valve cover; 11. Connecting part; 12. Fixing part; 13. Control chamber; 14. Connecting bolt; 15. Positioning block; 2. Valve cup; 21. Sliding chamber; 22. Positioning groove; 23. Liquid flow port; 3. External sealing ring; 4. Internal sealing ring; 5. Guide ring; 6. Valve seat; 61. Liquid passage; 62. Positioning ring; 7. Valve core; 8. Spring. Detailed Implementation

[0033] 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.

[0034] like Figure 1-3 As shown, this utility model provides a technical solution: a liquid level control valve, including a valve cover 1, a valve cup 2, an outer sealing ring 3, an inner sealing ring 4, a guide ring 5, a valve seat 6, a valve core 7, and a spring 8.

[0035] Reference Figure 1 The valve cover 1 includes a connecting part 11 and a fixing part 12. The connecting part 11 and the fixing part 12 are coaxially arranged and arranged sequentially in the vertical direction. The connecting part 11 and the fixing part 12 are integrally connected by welding.

[0036] Reference Figure 1Multiple positioning holes are evenly distributed circumferentially along the vertical direction at the edge of the connecting part 11. Each positioning hole has a connecting bolt 14 inside its cavity. The connecting bolt 14 passes through the positioning hole and is fixed to the relevant structure. The connecting bolt 14 and the connecting part 11 are threaded together. The connecting part 11 and the fixing part 12 are provided with a first through hole along the axial direction.

[0037] Reference Figure 1 The end face of the fixing part 12 away from the connecting part 11 is coaxially provided with a control cavity 13. The inside of the control cavity 13 is coaxially provided with a positioning block 15. The positioning block 15 and the fixing part 12 are integrally provided. The positioning block 15 is coaxially provided with a second through hole along the axial direction.

[0038] Reference Figure 1 The inner cavity of the control cavity 13 is connected to the inner cavities of the first through hole and the second through hole.

[0039] Reference Figure 1 The valve cup 2 is located on the side of the fixing part 12 away from the connecting part 11. The valve cup 2 and the fixing part 12 are coaxially arranged and detachably connected to the fixing part 12. In this embodiment, the valve cup 2 is preferably a hollow cylindrical structure, and a sliding cavity 21 is formed in the inner cavity of the cylindrical structure. An annular positioning groove 22 is formed at the bottom of the valve cup 2, and the positioning groove 22 communicates with the sliding cavity 21.

[0040] Reference Figure 1 The outer wall of the valve cup 2 is provided with a mounting groove coaxially at one end near the valve cover 1. Here, the mounting groove is preferably an annular groove. The outer sealing ring 3 is installed in the mounting groove and is sleeved on the valve cup 2. The outer sealing ring 3 and the valve cup 2 are fixedly connected.

[0041] Reference Figure 1 The inner wall of the valve cup 2 is provided with a first receiving groove and a second receiving groove along the axial direction from the connecting part 11 to the fixing part 12, and the first receiving groove is located on the side of the mounting groove closer to the connecting part 11. An internal sealing ring 4 is installed in the inner cavity of the first receiving groove, fits against the side wall of the first receiving groove, and is fixedly connected to the valve cup 2. A guide ring 5 is installed in the inner cavity of the second receiving groove, fits against the side wall of the second receiving groove, and is fixedly connected to the valve cup 2.

[0042] Reference Figure 1 The side wall of the valve cup 2 is provided with two liquid flow ports 23 at the end away from the connecting part 11. The liquid flow ports 23 are horizontally arranged and penetrate the side wall of the valve cup 2. The two liquid flow ports 23 are symmetrically arranged along the axial direction of the valve cup 2. The liquid flow ports 23 are connected to the sliding cavity 21.

[0043] Reference Figure 1The valve seat 6 is installed on the side of the valve cup 2 away from the connecting part 11. The valve seat 6 and the valve cup 2 are coaxially arranged and connected. In this embodiment, the valve seat 6 is preferably a hollow annular structure, and the inner cavity of the valve seat 6 forms a liquid passage 61. The liquid passage 61 and the sliding cavity 21 are coaxial and connected.

[0044] Reference Figure 1 A positioning ring 62 is coaxially provided at one end of the valve seat 6 near the valve cup 2. The positioning ring 62 and the valve seat 6 are coaxially and fixedly connected. In this embodiment, the positioning groove 22 is used to accommodate the positioning ring 62. An annular abutment groove is coaxially provided on the inner wall of the positioning ring 62 at one end near the valve cup 2.

[0045] Reference Figure 1 The valve core 7 is installed in the sliding cavity 21 and can slide along the axial direction of the sliding cavity 21 under the pressure of the control cavity 13. The outer wall of the valve core 7 is in contact with the inner wall of the valve cup 2. A connecting groove is provided coaxially at one end of the valve core 7 near the connecting part 11. The spring 8 is installed in the connecting groove. In this embodiment, the extension and contraction direction of the spring 8 is parallel to the axial direction of the valve core 7. One end of the spring 8 is fixedly connected to the valve core 7 after passing through the connecting groove, and the other end is sleeved on the positioning block 15 and fixedly connected to the positioning block 15.

[0046] Reference Figure 1 In this embodiment, the end of the valve core 7 away from the connecting part 11 is tapered, and the valve core 7 is attached to the abutment groove on the side wall of the tapered surface.

[0047] The working principle of a liquid level control valve is as follows: the operator first installs the control valve in a suitable position and connects the liquid flow port 23 and the liquid passage 61 to the corresponding pipeline, and then fixes the control valve with the connecting bolts 14.

[0048] When the liquid flows in direction A, if the liquid level exceeds the lower limit, the valve core 7 moves downward, causing the valve to close. When the liquid flows in direction B, the valve core 7 moves upward under high pressure, causing the valve to open until the liquid level returns to the normal position, thus achieving dual protection.

Claims

1. A level control valve, comprising a valve cup (2), characterized in that: The valve cup (2) is provided with a sliding cavity (21) through it, and the outer periphery of the valve cup (2) is provided with a liquid flow port (23) communicating with the sliding cavity (21); The valve cup (2) is equipped with: A valve cover (1) is installed at one end of the sliding cavity (21), and a control cavity (13) is provided on the side of the valve cover (1) facing the sliding cavity (21); A valve seat (6) is installed at the other end of the sliding cavity (21). The valve seat (6) is provided with a liquid passage (61), which is connected to the sliding cavity (21). The valve core (7) has its outer wall attached to the side wall of the sliding cavity (21). One end of the valve core (7) is installed in the control cavity (13) through an adjusting member, and the other end extends to cover all the openings of the liquid flow ports (23) and block the liquid passage (61). The adjusting member is used to control the valve core (7) to slide along the inner wall of the sliding cavity (21) to open the liquid flow ports (23).

2. The liquid level control valve according to claim 1, characterized in that: The adjusting element includes: Positioning block (15), the positioning block (15) and the valve cover (1) are fixedly connected; Spring (8), the extension and retraction direction of the spring (8) is parallel to the axial direction of the valve cup (2), one end of the spring (8) is sleeved on the positioning block (15) and fixedly connected to the positioning block (15), and the other end is fixedly connected to the valve core (7).

3. A level control valve according to claim 2, characterized in that: The valve cover (1) also includes: A connecting part (11) is provided with connecting bolts (14) arranged in an array, and the connecting part (11) is provided with a first through hole; The fixing part (12) is provided with a control cavity (13), and the positioning block (15) is fixedly connected to the fixing part (12); The positioning block (15) is provided with a second through hole, and the first through hole, the second through hole and the control cavity (13) are connected.

4. A level control valve according to claim 1, characterized in that: The inner wall of the valve cup (2) is coaxially provided with a first receiving groove, and an internal sealing ring (4) is installed in the first receiving groove. The internal sealing ring (4) is sandwiched between the valve cup (2) and the valve core (7), and the internal sealing ring (4) and the valve cup (2) are fixedly connected.

5. A level control valve according to claim 1, characterized in that: The inner wall of the valve cup (2) is coaxially provided with a second receiving groove, and the inner cavity of the second receiving groove is provided with a guide ring (5). The guide ring (5) is sandwiched between the valve cup (2) and the valve core (7), and the guide ring (5) and the valve cup (2) are fixedly connected.

6. A level control valve according to claim 1, characterized in that: The valve cup (2) is provided with a positioning groove (22) on one end away from the valve cover (1); The valve seat (6) is coaxially provided with a positioning ring (62), and the positioning groove (22) is used to accommodate the positioning ring (62). The inner wall of the positioning ring (62) is provided with an abutment groove, which can abut against the side wall of the valve core (7).

7. A level control valve according to claim 1, characterized in that: An external sealing ring (3) is coaxially installed on the outer wall of the valve cup (2), and the external sealing ring (3) and the valve cup (2) are fixedly connected.

Images