Stop valve with corrugated pipe sealing function

Abstract

The utility model provides a stop valve with a corrugated pipe sealing function, which comprises a shell, a valve element, a sealing element and a sealing element, the valve element part is coaxial with the channel of the shell and can be axially and movably arranged in the shell, one end of the valve element part is close to the valve port, and the other end of the valve element part is close to the port of the shell; the corrugated pipe sleeves the outer wall of the valve element part, one end of the corrugated pipe is connected to the outer wall, close to the valve port, of the valve element part, and the other end of the corrugated pipe extends in the radial direction and is connected to the shell in a sealed mode; the check valve is reasonable in design structure and convenient to operate, the corrugated pipe is arranged in the shell, an inner channel of the shell can be divided into mutually-isolated spaces, the position, close to a port, of one space can serve as a manual operation area of the check valve, and the other space serves as a control area of the check valve. A traditional sealing nut and O-shaped sealing ring structure is replaced, and the sealing structure has the advantages that operation is easy, the sealing performance is good, parts are not prone to being lost, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of valve design, in particular to a globe valve with a bellows seal function. Background Technique

[0002] The globe valve is an important auxiliary component in the air-conditioning system, which can prevent the refrigerant fluorine in the air conditioner from leaking, and can also be disassembled by a wrench when the air conditioner needs maintenance to discharge the refrigerant fluorine in the air conditioner.

[0003] Most of the traditional globe valve structures are as Figure 7 shown (or as described in the Chinese utility model patent with the application number 202321082172.9). The valve core is located inside the valve seat, and a sealing nut 17 is installed outside it. Among them, in order to perform the valve opening or closing operation, first, the sealing nut 17 needs to be disassembled, and then a tool such as a wrench is used to rotate the valve core to complete the valve opening and closing actions. However, this structure has certain defects in actual use: on the one hand, the sealing nut 17 is a permanent seal in structure. Since it needs to be disassembled during use, it often gets lost due to being casually placed by workers, and the frequent disassembly and assembly of the sealing nut 17 not only has the problem of cumbersome operation but also has the defect of poor sealing performance due to easy failure after long-term use; on the other hand, in the above solution, since the sealing nut 17 needs to be disassembled during use, an O-ring 18 needs to be provided between the valve core and the valve body to achieve the sealing effect. However, due to the relatively extreme operating environment of the air conditioner, when the environmental temperature is lower than -20°C, the O-ring 18 is very likely to fail, thus affecting the sealing effect. Summary of the Utility Model

[0004] The utility model provides a globe valve with a bellows seal function to solve the problems of easy loss, failure, cumbersome operation of the sealing nut, and failure and poor sealing performance of the O-ring caused by the use of the sealing nut and the O-ring in the existing globe valve as mentioned in the above background technique.

[0005] The technical solution of the utility model is realized as follows:

[0006] A globe valve with a bellows seal function, comprising:

[0007] A housing with a channel inside for facilitating fluid flow, and a valve port in the channel;

[0008] A valve core member coaxially arranged with the channel of the housing and axially movable inside the housing, with one end close to the valve port direction and the other end close to the port of the housing;

[0009] The corrugated pipe is sleeved on the outer wall of the valve core part, with one end connected to the outer wall of the valve core part near the valve port, and the other end extending in the radial direction and sealed and connected to the outer shell at the end;

[0010] Wherein, the corrugated pipe divides the internal channel of the outer shell into two mutually isolated spaces up and down. One end of the valve core part away from the valve port is in a different space from the valve port, and the valve core part can pass through the corrugated pipe and extend to the outside of the corrugated pipe.

[0011] Preferably, the valve core part includes a sealing valve core at one end near the valve port and a valve core shaft at the other end away from the valve port, and the lower end of the corrugated pipe is connected to the sealing valve core.

[0012] Preferably, it further includes:

[0013] A nut, which is of a hollow structure and is fixed at one end of the outer shell away from the space where the valve port is located;

[0014] A screw rod, which is threadedly connected to the center position of the nut and is connected to the end of the valve core part away from the valve port, and is used to drive the valve core part to move axially in the channel of the outer shell when rotating spirally.

[0015] Preferably, it further includes:

[0016] A gasket, which is located between the nut and the corrugated pipe, is fixed at the lower end of the nut, and the size of its central hole is smaller than that of the central hole of the nut, and is used to contact the lower end of the screw rod to play a limiting role when the screw rod rotates to the lowest point.

[0017] Preferably, it further includes:

[0018] A valve seat, which is fixed at the end position of the outer shell and extends in the outer direction of the outer shell, and the valve port is located at the center position of the valve seat;

[0019] A stainless steel pipe, which is sleeved on the valve seat extending to the outside of the outer shell, and the end abuts against the end wall of the outer shell.

[0020] Preferably, it further includes:

[0021] A fixing plate, which is installed on the outer wall of the outer shell and is close to the position where the stainless steel pipe contacts the outer shell;

[0022] The valve seat, the stainless steel pipe, the fixing plate and the outer shell are connected by one-time welding.

[0023] Preferably, it further includes:

[0024] A copper joint, which is fixed at the end of the stainless steel pipe.

[0025] Preferably, it further includes:

[0026] A pipe joint is fixed at the circumferential position of the outer shell and has a cavity inside that communicates with the cavity where the inner valve port of the outer shell is located.

[0027] The first pipe cap has a through structure at the center and is threadedly connected to the pipe joint for docking with an external pipe.

[0028] Preferably, it further includes:

[0029] A valve core joint is fixed at the circumferential position of the outer shell and has a cavity inside that communicates with the cavity where the inner valve port of the outer shell is located.

[0030] A valve core is fixed at the inner position of the valve core joint.

[0031] The second pipe cap has a sealed structure at the end and is threadedly connected to the end position of the valve core joint.

[0032] Preferably, the outer shell is a shell-like structure formed integrally by stretching or rolling.

[0033] Adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0034] The present utility model has a reasonable design structure and convenient operation. By arranging a corrugated pipe inside the outer shell, the internal channel of the outer shell can be divided into mutually isolated spaces. One space near the port can be used as the manual operation area of the stop valve, and the other space can be used as the control area of the stop valve, replacing the traditional structure of a sealing nut and an O-ring. It has the advantages of simple operation, good sealing performance, not easy to lose parts, and long service life. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a three-dimensional view of the present utility model;

[0037] Figure 2 It is a cross-sectional view of the present utility model;

[0038] Figure 3 It is a cross-sectional view of the open valve state when the present utility model is connected to an air-conditioning pipe;

[0039] Figure 4 It is a cross-sectional view of the closed valve state when the present utility model is connected to an air-conditioning pipe;

[0040] Figure 5This is the connection structure diagram of the corrugated pipe and the sealing valve core of the utility model;

[0041] Figure 6 This is the partial enlarged view of the utility model;

[0042] Figure 7 This is the cross-sectional view of the globe valve in the prior art.

[0043] Wherein:

[0044] 1. Housing; 2. Nut; 3. Screw; 4. Valve core shaft; 5. Sealing valve core; 6. Corrugated pipe; 7. Fixed plate; 8. Valve seat; 9. Valve port; 10. Stainless steel pipe; 11. Copper joint; 12. Pipe joint; 13. First pipe cap; 14. Valve core joint; 15. Valve core; 16. Second pipe cap; 17. Sealing nut; 18. O-ring; 19. Gasket. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0046] Refer to Figures 1 - 6 , a globe valve with a corrugated pipe sealing function, comprising:

[0047] A housing 1, having a channel inside for facilitating fluid flow, and a valve port 9 inside the channel. Among them, the housing 1 is a shell-like structure formed by stretching or rolling in one piece. More specifically, the housing 1 is a cylindrical structure, and its outer wall can be set to have or not have steps according to actual different requirements.

[0048] A valve core member, coaxially arranged with the channel of the housing 1 and axially movable inside the housing 1. One end of it is close to the valve port 9, and the other end is close to the port of the housing 1. Specifically, the valve core member includes a sealing valve core 5 at one end close to the valve port 9 and a valve core shaft 4 at the other end far from the valve port 9. The valve core member is arranged by connecting two parts. The purpose is to be able to replace only the sealing valve core 5 when the sealing valve core 5 is damaged, avoiding the problem of material waste.

[0049] The bellows 6 is sleeved on the outer wall of the valve core member, and one end is connected to the outer wall of the valve core member near the valve port 9, and the other end extends in the radial direction and is hermetically connected to the housing 1 at the end. Specifically, the lower end of the bellows 6 is connected to the sealing valve core 5, and the connection between the two can be specifically achieved by means of sealed welding. Among them, the bellows 6 divides the internal channel of the housing 1 into two mutually isolated spaces up and down. One end of the valve core member away from the valve port 9 and the valve port 9 are in different spaces, and the valve core member can pass through the bellows 6 and extend to the outside of the bellows 6. Since the lower end of the bellows 6 is hermetically connected to the sealing valve core 5, that is, there is no gap between the bellows 6 and the sealing valve core 5, no leakage problem will occur. And the upper end extends radially and is hermetically connected to the inner wall of the housing 1, and no leakage problem will occur either. Therefore, the bellows 6 and the sealing valve core 5 at the center position can divide the internal channel of the housing 1 into two non-communicating spaces as a whole, and the upper end of the valve core member can pass through the bellows 6 and extend upward, which is convenient for controlling the valve core member in the upper space and preventing leakage problems during operation and subsequent use.

[0050] Specifically, it further includes: a nut 2, which is of a hollow structure and is fixed to one end of the housing 1 away from the space where the valve port 9 is located; a screw 3, which is threadedly connected to the center of the nut 2 and is connected to one end of the valve core member away from the valve port 9. Among them, the upper end valve core shaft 4 of the valve core member and the screw 3 are connected by a transition tight fit, so that when rotating spirally, it can drive the valve core member to move axially in the channel of the housing 1. More specifically, to prevent the screw 3 from moving upward without limit, there is a step at the center of the nut 2, and the outer wall of the lower end of the screw 3 protrudes outward, and this protruding part can contact the step, so as to achieve the limiting effect of the upper limit position.

[0051] Specifically, it further includes: a gasket 19, which is located between the nut 2 and the bellows 6, is fixed to the lower end of the nut 2, and the size of its central hole is smaller than the central hole of the nut 2, so that when the screw 3 is rotated to the lowest point, it can contact the lower end of the screw 3 to play a limiting role. In addition, it can also play a certain guiding role for the valve core shaft 4 to prevent the valve core shaft 4 from tilting.

[0052] Specifically, it further includes: a valve seat 8, which is fixed at the end position of the housing 1, and one end extends towards the outside of the housing 1, and the valve port 9 is located at the central position of the valve seat 8; a stainless steel pipe 10, which is sleeved on the valve seat 8 extending to the outside of the housing 1, and the end abuts against the end wall of the housing 1. In addition, it further includes: a fixing plate 7, which is installed on the outer wall of the housing 1 and is close to the position where the stainless steel pipe 10 contacts the housing 1; the valve seat 8, the stainless steel pipe 10, the fixing plate 7 and the housing 1 are connected by one-time welding. The setting of the fixing plate 7 is to facilitate the installation and fixation of this globe valve. By setting the installation positions of the valve seat 8, the stainless steel pipe 10, and the fixing plate 7 at the same position, the connection between components can be achieved only by using one-time welding, which has the characteristics of simple process and stable structure.

[0053] Specifically, it further includes: a copper joint 11, which is fixed at the end position of the stainless steel pipe 10 and is used to connect the external pipeline.

[0054] Specifically, it further includes: a pipe joint 12, which is fixed at the circumferential position of the housing 1 and has a cavity inside that communicates with the cavity where the valve port 9 is located inside the housing 1; a first pipe cap 13, with a through structure at the center, is threadedly connected to the pipe joint 12 and is used to dock with the external pipeline, specifically the copper pipe of the air conditioner.

[0055] Specifically, it further includes: a valve core joint 14, which is fixed at the circumferential position of the housing 1 and has a cavity inside that communicates with the cavity where the valve port 9 is located inside the housing 1; a valve core 15, which is fixed inside the valve core joint 14; a second pipe cap 16, with a sealed end structure, is threadedly connected to the end position of the valve core joint 14 and is used to facilitate operations such as exhaust and maintenance.

[0056] When this globe valve with bellows sealing function is in use, during the valve opening process, a wrench is used to operate the screw rod 3 to rotate, so as to drive the valve core shaft 4 and the sealing valve core 5 to Figure 3 move upward as shown, to achieve valve opening. In this state, the overall length of the bellows 6 is A; during the valve closing process, the screw rod 3 is also rotated in the reverse direction by using a wrench, so that the valve core shaft 4 and the sealing valve core 5 move Figure 4 downward as shown, and finally the sealing valve core 5 contacts the valve port 9 to block the channel and complete the valve closing operation. In this state, the bellows 6 is stretched and the overall length is B, and the dimension B > A. When the valve is reopened, due to the elasticity of the bellows 6 itself, when the valve core shaft 4 moves upward, the overall length of the bellows 6 shortens again. Since the bellows 6 is used to divide the interior of the globe valve into two different upper and lower spaces, it can replace the structure with a sealing nut 17 and an O-ring 18 in the prior art (as Figure 7 shown), and has the advantages of simple structure, good sealing effect, and long service life of components.

[0057] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A globe valve with a bellows seal function, characterized in that, Comprising: A housing (1) with a channel inside for facilitating fluid flow, and a valve port (9) in the channel; A valve core member coaxially arranged with the channel of the housing (1) and axially movably arranged inside the housing (1), one end thereof being close to the direction of the valve port (9) and the other end being close to the port of the housing (1); A corrugated pipe (6) sleeved on the outer wall of the valve core member, and one end thereof being connected to the outer wall of the valve core member close to the valve port (9), and the other end extending in the radial direction and the end being sealingly connected to the housing (1); Wherein, the corrugated pipe (6) divides the internal channel of the housing (1) into two mutually isolated spaces up and down, one end of the valve core member away from the valve port (9) and the valve port (9) are in different spaces, and the valve core member can pass through the corrugated pipe (6) and extend to the outside of the corrugated pipe (6).

2. The globe valve with a bellows seal function according to claim 1, characterized in that, The valve core member includes a sealing valve core (5) at one end close to the valve port (9) and a valve core shaft (4) at the other end away from the valve port (9), and the lower end of the corrugated pipe (6) is connected to the sealing valve core (5).

3. The globe valve with bellows seal function according to claim 1, characterized in that, Further comprising: A nut (2) with a hollow structure, which is fixed at one end of the housing (1) away from the space where the valve port (9) is located; A screw rod (3) threadedly connected to the center of the nut (2) and connected to the end of the valve core member away from the valve port (9), and is used for driving the valve core member to axially move in the channel of the housing (1) when rotating spirally.

4. A globe valve with a bellows seal function according to claim 3, characterized in that, Further comprising: A gasket (19) located between the nut (2) and the corrugated pipe (6), which is fixed at the lower end of the nut (2), and the size of the central hole thereof is smaller than the central hole of the nut (2), and is used for contacting the lower end of the screw rod (3) to play a limiting role when the screw rod (3) rotates to the lowest point.

5. A globe valve with a bellows seal function according to claim 1, characterized in that, Further comprising: A valve seat (8), which is fixed at the end of the housing (1), and one end extends towards the outside of the housing (1), and the valve port (9) is located at the center of the valve seat (8); A stainless steel pipe (10) sleeved on the valve seat (8) extending to the outside of the housing (1), and the end abuts against the end wall of the housing (1).

6. The globe valve with a bellows seal function according to claim 5, characterized in that, Further comprising: A fixing plate (7), which is installed on the outer wall of the housing (1) and close to the position where the stainless steel pipe (10) contacts the housing (1); The valve seat (8), the stainless steel pipe (10), the fixing plate (7) and the housing (1) are integrally welded and connected at one time.

7. The globe valve with a bellows seal function according to claim 5, characterized in that, Further comprising: A copper joint (11), which is fixed at the end of the stainless steel pipe (10).

8. A globe valve with a bellows seal function according to claim 1, characterized in that, Further comprising: A pipe joint (12), which is fixed at the circumferential position of the housing (1), and has a cavity inside that communicates with the cavity where the valve port (9) is located inside the housing (1); A first pipe cap (13) with a through structure at the center, threadedly connected to the pipe joint (12) for docking an external pipe.

9. The globe valve with a bellows seal function according to claim 1, wherein, Further comprising: A valve core joint (14), which is fixed at the circumferential position of the housing (1), and has a cavity inside that communicates with the cavity where the valve port (9) is located inside the housing (1); A valve core (15), which is fixed inside the valve core joint (14); A second pipe cap (16) with a sealed end, which is threadedly connected to the end of the valve core joint (14).

10. The globe valve with bellows seal function according to claim 1, characterized in that, The housing (1) is a shell-like structure formed by stretching or rolling in one piece.

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