A diaphragm check valve for an oil separator

Abstract

The utility model discloses a diaphragm check valve for oil separator, including valve body, valve seat, support, diaphragm, and the bottom end of valve body is flared and is linked with valve seat, and the one end of valve seat is close to valve body and is provided with support and diaphragm, and diaphragm is movably arranged in the support, and the lower surface of diaphragm cooperates with the end face of valve seat, and the central position of diaphragm upper surface is provided with screw rod, and a plurality of counterweight nuts are connected with screw rod, the support includes end plate, apron and outer flange, and the outer edge of end plate is connected with apron, and the one end of apron is away from end plate and is provided with outer flange, and end plate is provided with through -hole, and apron is evenly provided with a plurality of through slots, and outer flange is connected with valve seat, the utility model discloses reasonable structure, and diaphragm is movably arranged in the support, and the central position of diaphragm upper surface is provided with a screw rod perpendicularly, a plurality of counterweight nuts can be installed through screw rod, and the number of counterweight nuts can be increased or decreased, so that the adjustment can be carried out according to the compressor of different power, and the flexibility and the application scope are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, specifically a diaphragm one-way valve for an oil separator. Background Technology

[0002] Using a check valve on an oil separator is standard and important practice. The oil separator is typically installed after the compressor's discharge port and before the condenser. When the compressor stops, the system pressure gradually equalizes, and the refrigerant on the high-pressure side (from the condenser and receiver) flows in reverse, passing through the oil separator and flowing back into the compressor's discharge chamber. This reverse-flowing gas may carry away oil droplets that have already separated and accumulated at the bottom of the oil separator, potentially flushing them into the compressor.

[0003] When the compressor is running, the diaphragm check valve in the oil separator opens the diaphragm under the pressure of the discharge, allowing the mixture of gas and oil droplets to enter the oil separator. When the compressor stops, the diaphragm closes quickly under the action of pressure difference and its own gravity, blocking the reverse passage from the condenser to the compressor, and providing a stable and undisturbed settling and return environment for the oil inside the oil separator.

[0004] Existing diaphragm check valves for oil separators require selecting a suitable diaphragm based on the compressor's power; a diaphragm that is too heavy or too light is unacceptable. However, once the diaphragm is installed, it is difficult to replace it, resulting in high requirements for the compatibility between the compressor and the diaphragm. Therefore, an improved technology is urgently needed to solve this problem in the existing technology. Summary of the Invention

[0005] The purpose of this utility model is to provide a diaphragm check valve for an oil separator. Several counterweight nuts can be installed on the upper surface of the diaphragm via screws, and the number of counterweight nuts can be increased or decreased. This allows for adjustment of the number of counterweight nuts according to compressors of different power, greatly improving flexibility and applicability, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a diaphragm check valve for an oil separator, comprising a valve body, a valve seat, a bracket, and a diaphragm. The bottom end of the valve body is flared and connected to the valve seat. The valve seat is provided with a bracket and a diaphragm near one end of the valve body. The diaphragm is movably disposed within the bracket. The lower surface of the diaphragm mates with the end face of the valve seat. A screw is provided at the center of the upper surface of the diaphragm, and several counterweight nuts are connected to the screw. The bracket includes an end plate, a surrounding plate, and an outer folded edge. The outer edge of the end plate is connected to the surrounding plate, and the outer folded edge is provided at the end of the surrounding plate away from the end plate. The end plate has a through hole, and the surrounding plate has several through grooves evenly distributed. The outer folded edge is connected to the valve seat.

[0007] Preferably, the present invention provides a diaphragm check valve for an oil separator, wherein a copper sleeve is inserted into and welded to the valve body at the end away from the valve seat.

[0008] Preferably, the present invention provides a diaphragm check valve for an oil separator, wherein the valve seat is inserted into and welded to one end of the check valve connector.

[0009] Preferably, the present invention provides a diaphragm check valve for an oil separator, wherein the valve seat has a groove on its periphery, and the valve body is inserted into and welded to the groove of the valve seat.

[0010] Preferably, the present invention provides a diaphragm check valve for an oil separator, wherein the valve seat is provided with a boss at one end near the valve body, and the outer flange mates with and is welded to the boss of the valve seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The diaphragm is movably mounted inside the support, and a screw is vertically mounted at the center of the upper surface of the diaphragm. Several counterweight nuts can be installed through the screw, and the number of counterweight nuts can be increased or decreased. This allows the number of counterweight nuts to be adjusted according to the compressor with different power, greatly improving flexibility and applicability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 For the appendix Figure 1 Schematic diagram of the cross-sectional structure at point AA; Figure 3 For the appendix Figure 2 Enlarged structural diagram of point B in the middle.

[0013] In the diagram: 1. Valve body; 2. Valve seat; 3. Diaphragm; 4. Screw; 5. Counterweight nut; 6. End plate; 7. Enclosure; 8. Outer fold; 9. Through hole; 10. Through groove; 11. Copper sleeve; 12. One-way valve connector; 201. Groove; 202. Boss. Detailed Implementation

[0014] The technical solution of this 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 this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] Please see Figure 1-3 This utility model provides a technical solution: a diaphragm check valve for an oil separator, including a valve body 1, a valve seat 2, a bracket, and a diaphragm 3. The bottom end of the valve body 1 is flared and connected to the valve seat 2. The valve seat 2 is provided with a bracket and a diaphragm 3 near the valve body 1. The diaphragm 3 is movably disposed in the bracket. The lower surface of the diaphragm 3 is engaged with the end face of the valve seat 2. A screw 4 is provided at the center of the upper surface of the diaphragm 3. Several counterweight nuts 5 are engaged and connected to the screw 4. A copper sleeve 11 is inserted into the valve body 1 away from the valve seat 2 and welded to it. The copper sleeve 11 is used to connect to the copper pipe of the refrigeration system. The valve seat 2 is inserted into and welded to one end of the check valve connector 12 to connect the valve seat 2 to the pipeline of the refrigeration system. A groove 201 is provided on the outer periphery of the valve seat 2. The valve body 1 and the valve seat 2 are inserted into the groove 201 and welded to each other. The engagement of the groove 201 greatly improves the connection stability between the valve body 1 and the valve seat 2. The bracket includes an end plate 6, a surrounding plate 7, and an outer flange 8. The outer edge of the end plate 6 is connected to the surrounding plate 7. The outer flange 8 is provided at the end of the surrounding plate 7 away from the end plate 6. The end plate 6 has a through hole 9. The surrounding plate 7 has several through grooves 10 evenly distributed. The outer flange 8 is connected to the valve seat 2. The valve seat 2 is also provided with a boss 202 at the end near the valve body 1. The outer flange 8 and the boss 202 of the valve seat 2 are fitted together and welded to each other, which improves the connection stability between the bracket and the valve seat 2.

[0016] Installation method and operating principle: First, weld the screw 4 to the center of the diaphragm 3. Then, place the diaphragm 3 with the screw 4 inside the bracket, and mate the outer folded edge 8 of the bracket with the boss 202 of the valve seat 2 and laser weld it. Next, mate the flared end of the valve body 1 with the groove 201 on the periphery of the valve seat 2 and laser weld it to complete the assembly. Then, insert one end of the copper sleeve 11 into the valve body 1 and laser weld the connection between the copper sleeve 11 and the valve body 1. Then, insert the one-way valve connector 12 into the valve seat 2 and laser weld the connection to complete the installation. Before use, install several counterweight nuts 5 on the screw 4 according to the power of the compressor. During operation, the refrigerant enters the valve seat 2 from the one-way valve connector 12 and pushes open the diaphragm 3. The refrigerant flows into the valve body 1 from the various through slots 10 of the enclosure plate 7 and leaves from the valve body 1 and the copper sleeve 11. When the compressor stops, the weight of the diaphragm 3, screw 4, and counterweight nut 5 causes the diaphragm 3 to press tightly against the mating surface of the valve seat 2, preventing refrigerant backflow. It should be noted that the counterweight nut 5 is similar to a weight, and the weight of each counterweight nut 5 can be different. This utility model has a reasonable structure; the diaphragm 3 is movably mounted within the bracket, and a screw 4 is vertically positioned at the center of the upper surface of the diaphragm 3. Several counterweight nuts 5 can be installed via the screw 4, and the number of counterweight nuts 5 can be increased or decreased. This allows for adjustment of the number of counterweight nuts 5 according to compressors of different power, greatly improving flexibility and applicability.

[0017] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0018] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A diaphragm check valve for an oil separator, characterized in that: The valve includes a valve body (1), a valve seat (2), a bracket, and a diaphragm (3). The bottom end of the valve body (1) is flared and connected to the valve seat (2). The valve seat (2) is provided with a bracket and a diaphragm (3) at one end near the valve body (1). The diaphragm (3) is movably disposed in the bracket. The lower surface of the diaphragm (3) is engaged with the end face of the valve seat (2). A screw (4) is provided at the center of the upper surface of the diaphragm (3). Several counterweight nuts (5) are connected to the screw (4). The bracket includes an end plate (6), a surrounding plate (7) and an outer folded edge (8). The outer edge of the end plate (6) is connected to the surrounding plate (7). The outer folded edge (8) is provided at the end of the surrounding plate (7) away from the end plate (6). The end plate (6) has a through hole (9). The surrounding plate (7) has several through grooves (10) evenly provided. The outer folded edge (8) is connected to the valve seat (2).

2. A diaphragm check valve for an oil separator according to claim 1, characterized in that: A copper sleeve (11) is inserted into the end of the valve body (1) away from the valve seat (2) and welded to it.

3. A diaphragm check valve for an oil separator according to claim 1, characterized in that: The valve seat (2) is inserted into and welded to one end of the one-way valve connector (12).

4. A diaphragm check valve for an oil separator according to claim 1, characterized in that: The valve seat (2) has a groove (201) on its periphery, and the valve body (1) is inserted into and welded to the groove (201) of the valve seat (2).

5. A diaphragm check valve for an oil separator according to claim 1, characterized in that: The valve seat (2) is provided with a boss (202) at one end near the valve body (1), and the outer flange (8) is fitted with the boss (202) of the valve seat (2) and welded to each other.

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