Screen seat capable of preventing holes from being blocked

Abstract

The utility model discloses a screen seat capable of preventing hole blocking, which comprises a stainless steel screen and a screen seat, the stainless steel screen is arranged at the top of the screen seat, the bottom of the screen seat is provided with a convex part extending downwards, the convex part is tightly matched in a mounting hole, and the outer side of the convex part is provided with a welding ring. The welding ring is independently arranged to accurately control the using amount of welding flux, and the matched convex part is tightly matched in the mounting hole, so that the downward flow of welding fluid can be reduced to a certain extent, meanwhile, the circumferential consistency of welding seams can be ensured as much as possible, the structure of an auxiliary tool is greatly simplified, and then the hole blocking problem is effectively avoided. The structure is preferably used for completing the welding operation of the convex part and the mounting hole in the tunnel furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separation, in particular to a screen seat for preventing hole blockage. Background Art

[0002] A gas-liquid separator is provided between the evaporator and the compressor of an air conditioner. Its function is to separate the liquid droplets in the medium, and then vaporize them in the gas-liquid separator and then enter the compressor to prevent the liquid droplets from entering the compressor and causing "liquid hammer" to the compressor. When the gas-liquid separator is working, it is necessary to separate the gas-liquid mixture output by the evaporator in the cylinder body, including oil and liquid refrigerant. The liquid refrigerant is vaporized and then sucked into the compressor through the return pipe. It can be seen that the most important component in the gas-liquid separator is the return pipe for forming the air flow channel. However, the existing return pipes are all provided with stainless steel screen seats. As Figure 6 shown, the stainless steel screen seat is provided with an oil return hole. The function of the stainless steel screen seat is, on the one hand, to disperse the cooling oil entering the return pipe, and on the other hand, to play a filtering role.

[0003] It has been found through research that the existing stainless steel screen seats are generally in clearance fit with the installation holes of the return channel and are fixed by manual brazing process. However, during welding, the problem of the welding liquid blocking the oil return holes easily occurs. The reasons are as follows:

[0004] 1. The clearance fit cannot effectively control the consistency of the circumferential uniformity of the gap and the gap is too large, which is easy to cause the welding liquid to flow down and block the oil return hole;

[0005] 2. The existing welding processes are mostly manual operations, and the amount of welding solder added cannot be effectively controlled. Furthermore, there is often too much welding solder, and the problem of blocking the oil return hole is more likely to occur. Summary of the Invention

[0006] In order to solve the above technical problems, the inventor has obtained the technical solution of the present utility model through practice and summary. The present utility model adopts the following technical solutions:

[0007] A screen seat for preventing hole blockage, comprising a stainless steel screen and a screen seat. The stainless steel screen is installed on the top of the screen seat. The bottom of the screen seat is provided with a convex portion extending downward. The convex portion is in a tight fit with the installation hole, and a welding ring is installed on the outer side of the convex portion.

[0008] By separately setting the welding ring to accurately control the amount of welding solder, and cooperating with the tight fit of the convex portion in the installation hole, the downward flow of the welding liquid can be reduced to a certain extent, and at the same time, the circumferential consistency of the weld can be ensured as much as possible, greatly simplifying the structure of the auxiliary tooling, and thus effectively avoiding the problem of hole blockage.

[0009] Preferably, a positioning ring groove is provided at the tail of the convex portion, and the welding ring is hoop-mounted in the positioning ring groove.

[0010] Through the setting of the positioning ring groove, circumferential uniform distribution is carried out at the first time when the welding ring turns into welding liquid, preventing the accumulation at a certain place. The positioning ring groove can also reduce the downward flow rate of the welding liquid, thereby reducing the risk of hole blockage. This structure is preferably used to complete the welding operation of the convex part and the mounting hole in a tunnel furnace.

[0011] Preferably, diversion slots are circumferentially and uniformly arranged at the bottom of the positioning ring groove. The top depth of the diversion slot is greater than the bottom depth, and the top depth of the diversion slot is less than the depth of the positioning ring groove.

[0012] The welding liquid that has undergone circumferential homogenization through the diversion slots is circumferentially and uniformly diverted downward, avoiding the unified downward flow at a certain concentrated place and playing a role of fine diversion.

[0013] Preferably, the welding ring is an open-ring structure, and the welding ring is sleeved or clamped in the positioning ring groove, and the card can allow relative rotation, which is convenient for production, processing and assembly.

[0014] Preferably, an inwardly converging body is arranged at the head position of the convex part. The top height of the inwardly converging body is greater than the bottom height of the convex part, and a plate-like structure is obliquely upwardly arranged between the top of the inwardly converging body and the bottom of the convex part.

[0015] Since neither tight fit nor clearance fit can prevent the downward flow of the welding liquid, an inwardly converging body is arranged at the position of the convex part close to the head. The obliquely upwardly arranged plate-like structure can separate the downward flowing welding liquid from approaching the oil return hole, thereby preventing the blockage problem.

[0016] Preferably, the cross-sectional dimension of the inwardly converging body is one-half to five-sixths of the cross-sectional dimension of the convex part. The centers of the inwardly converging body and the convex part coincide in the projection on the horizontal plane, and the inwardly converging body is 2-4 mm away from the head of the convex part.

[0017] By making the inwardly converging body as close as possible to the head of the convex part, the amount of welding liquid at the head of the flow channel can be avoided to be less. In combination with the obliquely upward plate-like structure, it can avoid the accumulation of the flow to the oil return hole and block the oil return hole.

[0018] Preferably, at least one set of annular grooves is arranged on the outer side of the convex part along the installation direction. The annular grooves can increase the downward flow resistance, and at the same time can realize the homogenization of the welding liquid at this place, so that the welding liquid finally approaching the oil return hole is greatly reduced, thereby solving the problem of hole blockage.

[0019] Preferably, the depth of the annular groove is 0.01-0.02 mm, and the width is one to three times the depth.

[0020] Preferably, the cross-section of the annular groove is square or V-shaped. When it is a V-shaped structure, its root is deflected against the installation direction of the convex part to hinder and divert the welding liquid.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model solves Problem 1: how to solve the problem of poor filtering and dispersion effect of the stainless steel screen for the cooling oil, and improves the stainless steel screen into a hemispherical structure with consistent pore size, which has good filtering and dispersion effects on the cooling oil; Problem 2: by setting solder rings on the convex part, accurately controlling the solder consumption, and additionally providing various homogenizing structures on it to reduce the downward flow rate of the solder, and also providing various blocking structures for increasing the downward flow resistance of the solder or separating the solder to avoid the occurrence of the problem of blocked holes. The welding operation of the screen base and the oil return pipe of this solution is preferably carried out in a tunnel furnace, and the welded product is bright without cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural sectional view of the utility model;

[0024] Figure 2 is Figure 1 the partial enlarged view at A in

[0025] Figure 3 is the overall structural diagram of the solder ring;

[0026] Figure 4 is the overall structural sectional view provided with an inwardly retracted body;

[0027] Figure 5 is the overall structural sectional view provided with an annular groove;

[0028] Figure 6 is the structural diagram of a traditional screen base.

[0029] Figure 7 is the structural diagram of the screen base of the utility model installed in the mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments.

[0031] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model.

[0032] Embodiment 1, as Figure 1and Figure 7 As shown, a screen seat for preventing hole blockage. The stainless - steel screen seat is tightly and fittingly installed on the mounting hole of the reflux channel 5. The mounting hole on the reflux channel 5 is an existing structure and no improvement is made here. The stainless - steel screen seat includes a stainless - steel screen 1 and a seat 2. The stainless - steel screen 1 is installed on the top of the seat 2. A convex part 3 extending downward is provided at the bottom of the seat 2. The convex part 3 is tightly and fittingly arranged in the mounting hole. For example, the diameter of the convex part 3 is 6.5 mm and the diameter of the mounting hole is 6.4 mm. A welding ring 4 is installed on the outside of the convex part 3. By press - fitting the convex part 3 tightly into the mounting hole, the welding ring 4 will be clamped between the bottom of the seat 2 and the mounting hole. In the tunnel furnace, nitrogen and hydrogen are generated by the decomposition of internal ammonia gas, and then gas protection can be realized for the welding position. The product is bright and no subsequent cleaning operation is required. The welding ring 4 is made of tin bronze material, which can ensure that the weld has higher strength. After installation and testing, the weld can withstand 250,000 impacts of cooling oil without micro - cracks.

[0033] Embodiment 2. On the basis of Embodiment 1, as Figure 2 shown, a positioning ring groove 21 is provided at the tail (top) of the convex part 3, and the welding ring 4 is hooped in the positioning ring groove 21. The positioning ring groove 31 plays a role in restricting the welding ring 4. Secondly, it also homogenizes circumferentially in the first time when the welding liquid is formed, leaving a certain amount of welding liquid, reducing the downward flow rate, and avoiding the concentration and downward flow at one place at the beginning of the formation of the welding liquid. The depth of the positioning ring groove 21 is one - fourth to one - third of the thickness of the convex part 21. The cross - section of the positioning ring groove 21 can be arc - shaped, rectangular, or dovetail - shaped.

[0034] The bottom of the positioning ring groove 31 is circumferentially and evenly provided with shunt slots 311. The top depth of the shunt slots 311 is greater than the bottom depth, and the top depth of the shunt slots 311 is less than the depth of the positioning ring groove 21. Through the shunt slots 311, the circumferentially homogenized welding liquid is evenly shunted downward circumferentially, avoiding the unified downward flow at a certain concentrated place, and playing a role in fine shunting.

[0035] Embodiment 3. On the basis of Embodiment 2, as Figure 3 shown, the welding ring 4 is an open - loop structure. The welding ring 4 is hooped or clamped in the positioning ring groove 31 and can allow relative rotation, which is convenient for production, processing and assembly.

[0036] Embodiment 4. In the screen seat, as Figure 4 shown, an inward - receiving body 33 is provided at the position of the convex part 3 close to the head (bottom). An oil - return hole is provided at the bottom of the inward - receiving body 33. The top height of the inward - receiving body 33 is greater than the bottom height of the convex part 21, and a plate - like structure 32 arranged obliquely upward is connected between the top of the inward - receiving body 33 and the bottom of the convex part 21. The obliquely upward (relative to the bottom of the convex part 21) plate - like structure 32 can prevent the flowing - down welding liquid from directly flowing to the oil - return hole, and the plate - like structure 32 can separate the welding liquid from the oil - return hole.

[0037] The cross-sectional dimension of the adductor body 33 is one-half to five-sixths of the cross-sectional dimension of the convex part 3, preferably four-fifths. The projections of the centers of the adductor body 33 and the convex part 3 on the horizontal plane coincide, and the bottom of the adductor body 33 is 2-4 mm away from the bottom of the convex part 3. The adductor body 33 is as close as possible to the head (bottom) of the convex part 3, so that the amount of welding fluid in the flow channel oil return hole is as small as possible, and the problem of blocked holes caused by excessive welding fluid can be solved.

[0038] Example 5, in the screen holder, as Figure 5 shown, at least one set of annular grooves 34 is arranged on the outer side of the convex part 3 along the installation direction. The depth of the annular groove 34 is 0.01-0.02 mm, and the width is one to three times the depth. The annular groove 34 can increase the resistance along the installation direction (the vertical flow direction of the welding fluid), and gradually reduce the downward flow of the welding fluid along the way, thereby eliminating the problem of blockage of the oil return hole. The cross-section of the annular groove 34 is square or V-shaped. When it is a V-shaped structure, the root part thereof is skewed against the installation direction of the convex part 21 to hinder and divert the welding fluid.

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be a substitution of part of the structure, device, method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and its inventive concept should be covered within the protection scope of the present invention.

Claims

1. A screen seat for preventing hole blockage, characterized in that, It includes a stainless-steel screen and a screen base. The stainless-steel screen is installed on the top of the screen base. A convex part extending downward is provided at the bottom of the screen base. The convex part is tightly fitted in the mounting hole, and a welding ring is installed on the outer side of the convex part.

2. The anti-clogging screen seat according to claim 1, characterized in that, A positioning ring groove is provided at the tail of the convex part, and the welding ring is hoop-mounted in the positioning ring groove.

3. The anti-clogging screen seat according to claim 2, characterized in that, Diversion slots are evenly arranged circumferentially at the bottom of the positioning ring groove. The top depth of the diversion slot is greater than the bottom depth, and the top depth of the diversion slot is less than the depth of the positioning ring groove.

4. The anti-clogging screen seat according to claim 1, characterized in that, The welding ring is of an open-ring structure.

5. The anti-clogging screen holder according to claim 2, characterized in that, An inward-receiving body is provided at the head position of the convex part. The top height of the inward-receiving body is greater than the bottom height of the convex part, and a plate-like structure is obliquely upwardly provided between the top of the inward-receiving body and the bottom of the convex part.

6. The anti-clogging screen holder according to claim 5, characterized in that, The cross-sectional dimension of the inward-receiving body is one-half to five-sixths of the cross-sectional dimension of the convex part. The centers of the inward-receiving body and the convex part coincide in the projection on the horizontal plane, and the inward-receiving body is 2-4 mm away from the head of the convex part.

7. The anti-clogging screen holder according to any one of claims 1 to 6, characterized in that, At least one group of annular grooves is provided on the outer side of the convex part along the installation direction.

8. The anti-clogging screen seat according to claim 7, characterized in that, The depth of the annular groove is 0.01-0.02 mm, and the width is one to three times the depth.

9. The anti-clogging screen holder according to claim 7, wherein, The cross-section of the annular groove is square or V-shaped.

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