Novel double-pipe stop valve with sealing structure

Abstract

The utility model discloses a novel double-pipe stop valve with a sealing structure, which comprises a valve body, a valve rod is arranged in an inner cavity of the valve body, the valve rod is positioned on the left side of one end extending into the inner cavity of the valve body, a first copper pipe is arranged at an upper port of the valve body, a rubber plug is arranged in the first copper pipe, a second copper pipe is arranged at a right port of the valve body, and a valve core is arranged in a lower port of the valve body. A transverse head portion of an original valve body is designed to be connected with a copper pipe in a brazed mode, the structure is simple and easy to achieve, the requirement for machining precision is not high, only the brazed portion is firm in structure, the conventional brazed requirement is met, and the requirement for the sealing performance of the brazed portion can be met. Meanwhile, the rubber plug is screwed into the copper pipe at the position, the rubber plug is in threaded connection with the copper pipe of the valve body, and an O-shaped ring on the rubber plug can ensure that a good sealing effect is formed in the copper pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, in particular to a double-tube stop valve with a novel sealing structure. Background Art

[0002] The stop valve is a key component in air conditioning and refrigeration equipment that acts as a circuit breaker and connects indoor and outdoor units. It works under complex working conditions in relatively harsh outdoor environments, and is sealed under high and low pressure changes and high and low temperature hot and cold cycles for a long time. The existing conventional stop valve has a complex structure at the cross head, and requires high processing accuracy. During the process flow, it is necessary to pay attention to protecting the sealing cone surface to ensure its sealing. For the double-tube stop valve, in order to facilitate the leak detection process, a sealing cap needs to be welded on the mouth of the copper pipe. The installer needs to remove the sealing cap by desoldering, and re-weld the copper pipe to connect the indoor unit, which causes trouble for the installation operation. Utility Model Content

[0003] The utility model aims to provide a double-tube stop valve with a novel sealing structure to solve the problems raised in the above-mentioned background technology.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A double-tube stop valve with a novel sealing structure comprises a valve body, an inner cavity of the valve body is provided with a valve stem, and the valve stem is located on the left side of one end extending into the inner cavity of the valve body, an upper port of the valve body is provided with a No. 1 copper tube, a rubber plug is provided in the No. 1 copper tube, a right port of the valve body is provided with a No. 2 copper tube, and a valve core is provided in the lower port of the valve body.

[0006] Preferably, the rubber plug is sealed and connected to the No. 1 copper tube via a No. 2 O-ring.

[0007] Preferably, the lower end of the rubber plug is provided with an external thread, the upper end thereof adopts an external hexagonal structure, an O-ring groove is provided in the middle for assembling a No. 2 O-ring, the rubber plug penetrates into the No. 1 copper tube, and is screwed to the valve body through the external thread engagement.

[0008] Preferably, the No. 1 copper tube and the No. 2 copper tube are connected to the valve body by brazing.

[0009] Preferably, a check ring and a No. 1 O-ring are sleeved on the valve stem, and the check ring is located on the left side of the No. 1 O-ring. An upper cover nut is provided at the left end of the valve body, and the upper cover nut is screwed to the left end of the valve body by a thread.

[0010] Preferably, a dustproof rubber cap is provided at one end of the No. 2 copper tube away from the valve body.

[0011] Preferably, the valve body is screwed with a fluorine injection nozzle nut.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] In the utility model, the original valve body cross head part is designed to be connected with the copper tube by brazing, the structure is simple and easy to realize, and the processing precision requirement is not high. It only needs the brazing part to have a firm structure to meet the conventional brazing requirements and ensure its sealing performance requirements; at the same time, the rubber plug is screwed into the copper tube of this part, and the rubber plug is threadedly connected with the copper tube of the valve body, and the O-ring on the rubber plug can ensure a good sealing effect with the inside of the copper tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 It is a left view of the utility model;

[0016] Figure 3 It is a top view of the utility model;

[0017] In the figure: 1. Valve body; 2. Valve stem; 3. No. 1 O-ring; 4. Check ring; 5. Upper cover nut; 6. No. 1 copper tube; 7. No. 2 O-ring; 8. Rubber plug; 9. No. 2 copper tube; 10. Dust-proof rubber cap; 11. Valve core; 12. Fluorine injection nozzle nut. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present utility model are described in detail below.

[0019] The "range" disclosed in the utility model is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a specific parameter, it is understood that the range of 10 to 40 and 20 to 50 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In this application, unless otherwise specified, the range of values ​​"a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the range of values ​​"0 to 5" means that all real numbers between "0 to 5" have been fully listed in this article, and "0 to 5" is only an abbreviation of these numerical combinations.

[0020] If not otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0021] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0022] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0023] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0024] Unless otherwise specified, the reaction is carried out at room temperature and pressure.

[0025] Unless otherwise specified, all parts or percentages are by weight.

[0026] In the present invention, all substances used are known substances and can be purchased or synthesized by known methods.

[0027] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and can be purchased.

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] Example:

[0030] A double-pipe stop valve with a new sealing structure, such as Figure 1-3 As shown, it includes a valve body 1, the inner cavity of the valve body 1 is provided with a valve stem 2, and the valve stem 2 is located on the left side of one end extending into the inner cavity of the valve body 1, the upper port of the valve body 1 is provided with a No. 1 copper tube 6, the No. 1 copper tube 6 is provided with a rubber plug 8, the right port of the valve body 1 is provided with a No. 2 copper tube 9, and the lower port of the valve body 1 is provided with a valve core 11.

[0031] Furthermore, the rubber plug 8 is sealedly connected to the No. 1 copper tube 6 via the No. 2 O-ring 7 .

[0032] Furthermore, the lower end of the rubber plug 8 is provided with an external thread, and the upper end thereof adopts an external hexagonal structure, with an O-ring groove in the middle for assembling the No. 2 O-ring 7. The rubber plug 8 penetrates into the No. 1 copper tube 6 and is screwed to the valve body 1 through the external thread engagement.

[0033] Furthermore, the No. 1 copper tube 6 and the No. 2 copper tube 9 are connected to the valve body 1 by brazing.

[0034] Furthermore, a check ring 4 and a No. 1 O-ring 3 are sleeved on the valve stem 2, and the check ring 4 is located on the left side of the No. 1 O-ring 3. An upper cover nut 5 is provided at the left end of the valve body 1, and the upper cover nut 5 is screwed to the left end of the valve body 1 by a thread.

[0035] Furthermore, a dustproof rubber cap 10 is provided at one end of the No. 2 copper tube 9 away from the valve body 1 .

[0036] Furthermore, a fluorine injection nozzle nut 12 is screwed onto the valve body 1 .

[0037] In one possible implementation, see Figure 1-3 As shown, a double-tube stop valve with a new sealing structure is provided. A No. 1 copper tube 6 is provided on the top of the valve body 1, and a No. 2 copper tube 9 is provided on the right side. The two copper tubes are connected to the valve body 1 by brazing. The heating temperature is low, the joint is smooth and flat, the organization and mechanical properties change little, the deformation is small, and the workpiece size is accurate. A valve stem 2 is provided in the inner cavity of the valve body 1, and the valve stem 2 is located on the left side of one end extending into the inner cavity of the valve body 1. A stop ring 4 and a No. 1 O-ring 3 are sleeved on the valve stem 2, and the stop ring 4 is located on the left side of the No. 1 O-ring 3. An upper cover nut 5 is provided at the left end of the valve body 1, and the upper cover nut 5 is threadedly connected to the valve body 1 for easy assembly and disassembly.

[0038] In one possible implementation, one end of the rubber plug 8 is processed with an external thread, and the other end is processed into an external hexagonal shape, with an O-ring groove in the middle for assembling the No. 2 O-ring 7. The rubber plug 8 goes deep into the No. 1 copper tube 6 and is connected to the valve body 1 through threaded engagement, and the external hexagonal shape at the other end makes assembly and disassembly convenient and quick. The rubber plug 8 is provided with a suitable O-ring groove, and with the selection of reasonable O-ring specifications, it can meet the excellent sealing performance with the inside of the No. 1 copper tube 6. The rubber plug 8 can be recycled and reused many times, and its sealing performance will not be affected. This double-tube stop valve with a new sealing structure is convenient for air-conditioning manufacturers to conduct leak detection of the entire machine, and also convenient for installers to evacuate and charge refrigerant to the air conditioner.

[0039] By adopting the above technical solution:

[0040] The structural design of this application is reasonable. The joint structure of the original cross-head part is complex and requires high processing accuracy. This application is designed to be brazed with the No. 1 copper tube 6. The stop valve is now designed as a double copper tube structure. The No. 2 O-ring 7 on the rubber plug 8 is sealed inside the No. 1 copper tube 6, which is convenient for leak detection and installation of the air conditioner. Through the above structural design, excellent sealing performance can be achieved, the structure is simple and practical, and it can be promoted in the double-tube stop valve structure design.

[0041] Working principle, see Figure 1-3 On the one hand, the horizontal head of the original valve body is designed to be brazed with the copper tube. The structure is simple and easy to implement, and the processing accuracy requirements are not high. It only needs the brazing part to have a firm structure to meet the conventional brazing requirements and ensure its sealing performance requirements; on the other hand, the rubber plug is screwed into the copper tube of this part, and the rubber plug is threadedly connected to the copper tube of the valve body. The O-ring on the rubber plug can ensure a good sealing effect with the inside of the copper tube.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-pipe stop valve with a new sealing structure, characterized in that: The valve body (1) comprises a valve stem (2) disposed in the inner cavity of the valve body (1), and the valve stem (2) is located on the left side of one end extending into the inner cavity of the valve body (1); a No. 1 copper tube (6) is disposed at the upper end of the valve body (1), a rubber plug (8) is disposed in the No. 1 copper tube (6), a No. 2 copper tube (9) is disposed at the right end of the valve body (1), and a valve core (11) is disposed in the lower end of the valve body (1).

2. A double-pipe stop valve with a new sealing structure as claimed in claim 1, characterized in that: The rubber plug (8) is sealedly connected to the No. 1 copper tube (6) via a No. 2 O-ring (7).

3. A double-pipe stop valve with a new sealing structure as claimed in claim 1, characterized in that: The lower end of the rubber plug (8) is provided with an external thread, and the upper end thereof adopts an external hexagonal structure. An O-ring groove is provided in the middle for assembling a No. 2 O-ring (7). The rubber plug (8) is inserted into the No. 1 copper tube (6) and is screwed to the valve body (1) through the engagement of the external thread.

4. A double-pipe stop valve with a new sealing structure as claimed in claim 1, characterized in that: The No. 1 copper tube (6) and the No. 2 copper tube (9) are both connected to the valve body (1) by brazing.

5. A double-pipe stop valve with a novel sealing structure as claimed in claim 1, characterized in that: The valve stem (2) is sleeved with a check ring (4) and a No. 1 O-ring (3), and the check ring (4) is located on the left side of the No. 1 O-ring (3). The left end of the valve body (1) is provided with an upper cover nut (5), and the upper cover nut (5) is screwed to the left end of the valve body (1) by means of a thread.

6. A double-pipe stop valve with a novel sealing structure as claimed in claim 1, characterized in that: A dustproof rubber cap (10) is provided at one end of the No. 2 copper tube (9) away from the valve body (1).

7. A double-pipe stop valve with a novel sealing structure as claimed in claim 1, characterized in that: The valve body (1) is screwed with a fluorine injection nozzle nut (12).

Images