Valve with good sealing performance

Abstract

The utility model discloses a valve with good sealing performance, which relates to the technical field of valves, and comprises a valve body and external pipes on two sides of the valve body, first sealing grooves are arranged on two sides of the valve body, first annular sealing gaskets are arranged in the first sealing grooves, first flanges are fixed on two sides of the valve body, and second flanges are fixed on two sides of the valve body. Inserting connection grooves are formed between the first flanges on the two sides and the valve body, a second flange is fixed to one side of the external connection pipe, an inserting connection pipe is arranged on the side, away from the external connection pipe, of the second flange, a second sealing groove is formed in the inserting connection pipe, and a second annular sealing gasket is arranged in the second sealing groove. And a third annular sealing gasket is arranged between the first flange and the second flange, a plurality of fastening bolt sets are evenly distributed in the circumferential direction of the first flange and the circumferential direction of the second flange, and the valve has the beneficial effect that the sealing performance and installation convenience are improved when the external pipe and the valve body are connected.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve with good sealing performance. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, with functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems have a wide variety of varieties and specifications, from the simplest shut-off valves to various valves used in extremely complex automatic control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

[0003] When the existing valve is connected to the external pipe, the sealing ring is easy to deviate, so the sealing performance deteriorates after the connection. Usually, leakage is easy to occur at the connection between the valve and the external pipe. Therefore, it is necessary to frequently disassemble and reconnect and fix, which is very troublesome. Therefore, we propose a valve with good sealing performance to solve the above problem. Utility Model Content

[0004] The utility model provides a valve with good sealing performance, which solves the technical problems of poor sealing performance and slow installation of current valves.

[0005] To solve the above technical problems, the utility model provides a valve with good sealing performance, including a valve body and external tubes on both sides of the valve body, the two sides of the valve body are provided with first sealing grooves, the first sealing grooves are provided with first annular sealing gaskets, the two sides of the valve body are fixed with first flanges, the first flanges on both sides and the valve body are formed with plug-in grooves, one side of the external tube is fixed with a second flange, the side of the second flange away from the external tube is provided with a plug-in tube, the plug-in tube is provided with a second sealing groove, the second sealing groove is provided with a second annular sealing gasket, the plug-in tube is plugged into the plug-in groove, a third annular sealing gasket is provided between the first flange and the second flange, a plurality of fastening bolt groups are evenly distributed around the circumference of the first flange and the second flange, the fastening bolt groups fasten the first flange and the second flange so that the external tube and the valve body are sealed and connected.

[0006] Preferably, a plurality of positioning pins are fixed on the circumference of the first flange, a plurality of positioning holes are opened on the circumference of the third annular sealing gasket, and the third annular sealing gasket is arranged on the first flange so that the positioning pins are inserted into the positioning holes.

[0007] Adopt the above technical solution: A number of positioning pins are fixed on the circumference of the first flange, a number of positioning holes are formed on the circumference of the third annular gasket, the third annular gasket is arranged on the first flange, and the positioning pins are inserted into the positioning holes. The advantages of the positioning pins and the positioning holes are that when the third annular gasket is arranged on the first flange, it can prevent the third annular gasket from running off. When the first flange is connected to the second flange, there is no need to hold and adjust the third annular gasket by hand, which improves the efficiency when the first flange is connected to the second flange, and at the same time improves the sealing performance at the connection between the first flange and the second flange.

[0008] Preferably, the length of the positioning pin is less than the length of the positioning hole.

[0009] Adopt the above technical solution: Since the length of the positioning pin is less than the length of the positioning hole, when the first flange is connected to the second flange, it is tightened by a set of fastening bolts. During the tightening process, the third annular gasket will be squeezed. When the third annular gasket is squeezed, the sealing performance at the connection between the first flange and the second flange is enhanced. When the third annular gasket is squeezed until the length of the positioning hole is the same as the length of the positioning pin, at this moment, the second flange abuts against the positioning pin. The advantage of this is that it can prevent the third annular gasket from being overly squeezed during tightening, resulting in a reduced service life and damage of the third annular gasket.

[0010] Preferably, clamping blocks are fixed on both sides of the second flange, clamping grooves are fixed on both sides of the first flange, and the clamping blocks are clamped in the clamping grooves.

[0011] Adopt the above technical solution: Since clamping blocks are fixed on both sides of the second flange, clamping grooves are fixed on both sides of the first flange, and the clamping blocks are clamped in the clamping grooves. When the first flange is connected to the second flange, the clamping blocks are clamped in the clamping grooves to achieve quick alignment and clamping fixation of the first flange and the second flange, and at this moment, both hands can be liberated to tighten the first flange and the second flange again with the set of fastening bolts, improving the installation efficiency.

[0012] Preferably, a number of second through holes are formed on the circumference of the second flange, a number of first through holes are formed on the circumference of the first flange, a number of third through holes are formed on the circumference of the third annular gasket, and the sizes and numbers of the second through holes, the first through holes, and the third through holes are all the same.

[0013] Adopt the above technical solution: Since a number of second through holes are formed on the circumference of the second flange, a number of first through holes are formed on the circumference of the first flange, a number of third through holes are formed on the circumference of the third annular gasket, and the sizes and numbers of the second through holes, the first through holes, and the third through holes are all the same, it is convenient to pass the set of fastening bolts through the first through holes, the second through holes, and the third through holes for fastening and fixing.

[0014] Preferably, the second annular gasket is adapted to the size of the second sealing groove, and the first annular gasket is adapted to the size of the first sealing groove.

[0015] Adopting the above technical solution: Since the second annular gasket is adapted to the size of the second sealing groove, the second annular gasket does not deviate during installation. Since the first annular gasket is adapted to the size of the first sealing groove, the first annular gasket does not deviate during installation, thereby improving the sealing performance after installation.

[0016] Preferably, the size of the insertion pipe is adapted to the size of the insertion groove, and the length of the insertion pipe is the same as the depth of the insertion groove.

[0017] Adopting the above technical solution: Since the size of the insertion pipe is adapted to the size of the insertion groove, it is convenient for the insertion pipe to be inserted into the insertion groove. Since the length of the insertion pipe is the same as the depth of the insertion groove, when the insertion pipe is inserted into the insertion groove, the insertion pipe just touches the first annular gasket, further improving the sealing performance.

[0018] Compared with the related art, the utility model has the following beneficial effects:

[0019] 1. Compared with the traditional valve, the utility model is provided with an insertion pipe, an insertion groove, a first annular gasket, a first sealing groove, a second annular gasket, a second sealing groove and a third annular gasket. The first annular gasket is embedded in the first sealing groove, the second annular gasket is embedded in the second sealing groove, the insertion pipe is inserted in the insertion groove, the third annular gasket is arranged between the first flange and the second flange, and a plurality of fastening bolt groups are evenly distributed in the circumferential direction of the first flange and the second flange. The fastening bolt groups fasten the first flange and the second flange to seal and connect the external pipe and the valve body. The beneficial effect of the present invention is that when connecting the external pipe and the valve body, it effectively prevents the first annular gasket, the second annular gasket and the third annular gasket from deviating, improves the sealing performance when connecting the external pipe and the valve body, the insertion pipe is inserted in the insertion groove, and quick insertion can be realized. After insertion, the preliminary fixation between the external pipe and the valve body can be realized, which can free both hands and improve the installation efficiency when connecting the external pipe and the valve body.

[0020] 2. A plurality of positioning pins are fixed on the circumference of the first flange, and a plurality of positioning holes are formed on the circumference of the third annular gasket. When the third annular gasket is arranged on the first flange, it is not necessary to hold and adjust the third annular gasket by hand when connecting the first flange and the second flange. At the same time, the positioning pins can prevent the third annular gasket from being excessively squeezed by the first flange and the second flange during fastening, resulting in a reduction in the service life and damage of the third annular gasket. Clamping blocks are fixed on both sides of the second flange, and clamping grooves are fixed on both sides of the first flange, realizing quick alignment and preliminary clamping fixation of the first flange and the second flange, and further improving the installation efficiency. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of a valve with good sealing performance;

[0022] Figure 2 It is a schematic diagram of the disassembled structure of a valve with good sealing performance;

[0023] Figure 3 It is a schematic diagram of the disassembled structure of a valve with good sealing performance from another perspective;

[0024] Figure 4 It is a structural diagram of the outer connecting pipe and the second flange in a valve with good sealing performance;

[0025] Figure 5 It is a structural diagram of the valve body in a valve with good sealing performance;

[0026] Figure 6 It is a partial disassembled structural diagram of a valve with good sealing performance.

[0027] Reference numerals in the figure: 1, valve body; 11, first sealing groove; 12, insertion groove; 2, first flange; 21, clamping groove; 22, positioning pin; 23, first through hole; 3, third annular sealing gasket; 31, positioning hole; 32, third through hole; 4, first annular sealing gasket; 5, second flange; 51, second through hole; 52, clamping block; 6, outer connecting pipe; 7, insertion pipe; 71, second sealing groove; 8, second annular sealing gasket; 9, fastening bolt group. Detailed Description of the Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] As Figures 1-6As shown, a valve with good sealing performance comprises a valve body 1 and external pipes 6 on both sides of the valve body 1, first sealing grooves 11 are provided on both sides of the valve body 1, a first annular sealing gasket 4 is arranged in the first sealing groove 11, first flanges 2 are fixed on both sides of the valve body 1, plug-in grooves 12 are formed between the first flanges 2 on both sides and the valve body 1, a second flange 5 is fixed on one side of the external pipe 6, a plug-in pipe 7 is arranged on the side of the second flange 5 away from the external pipe 6, a second sealing groove 71 is provided in the plug-in pipe 7, a second annular sealing gasket 8 is arranged in the second sealing groove 71, the plug-in pipe 7 is inserted in the plug-in groove 12, a third annular sealing gasket 3 is arranged between the first flange 2 and the second flange 5, a plurality of fastening bolt groups 9 are evenly distributed in the circumferential direction of the first flange 2 and the second flange 5, the fastening bolt group 9 fastens the first flange 2 and the second flange 5 so that the external pipe 6 and the valve body 1 are sealed and connected;

[0031] The first annular sealing gasket 4 is embedded in the first sealing groove 11, the second annular sealing gasket 8 is embedded in the second sealing groove 71, the plug-in tube 7 is inserted in the plug-in groove 12, and the third annular sealing gasket 3 is arranged between the first flange 2 and the second flange 5. A plurality of fastening bolt groups 9 are evenly distributed circumferentially between the first flange 2 and the second flange 5. The fastening bolt group 9 fastens the first flange 2 and the second flange 5 to seal the external tube 6 and the valve body 1. The beneficial effect of the present invention is that when the external tube 6 is connected to the valve body 1, the first annular sealing gasket 4, the second annular sealing gasket 8 and the third annular sealing gasket 3 are effectively prevented from deviating, and the sealing performance when the external tube 6 and the valve body 1 are connected is improved. The plug-in tube 7 is inserted in the plug-in groove 12, which can realize quick plug-in. After plug-in, the external tube 6 and the valve body 1 are initially fixed, which can free both hands and improve the installation efficiency when the external tube 6 and the valve body 1 are connected.

[0032] Embodiment 2

[0033] like Figures 1-6As shown in the figure, a number of positioning pins 22 are fixedly arranged on the circumference of the first flange 2, a number of positioning holes 31 are formed on the circumference of the third annular gasket 3, the third annular gasket 3 is arranged on the first flange 2, so that the positioning pins 22 are inserted into the positioning holes 31. The length of the positioning pins 22 is less than that of the positioning holes 31. Clamping blocks 52 are fixed on both sides of the second flange 5, clamping grooves 21 are fixed on both sides of the first flange 2, the clamping blocks 52 are clamped in the clamping grooves 21. A number of second through holes 51 are formed on the circumference of the second flange 5, a number of first through holes 23 are formed on the circumference of the first flange 2, and a number of third through holes 32 are formed on the circumference of the third annular gasket 3. The sizes and numbers of the second through holes 51, the first through holes 23 and the third through holes 32 are the same. The second annular gasket 8 is adapted to the size of the second sealing groove 71, and the first annular gasket 4 is adapted to the size of the first sealing groove 11. During installation, the first annular gasket 4 and the second annular gasket 8 do not deviate, improving the sealing performance after installation. The size of the insertion pipe 7 is adapted to the size of the insertion groove 12, facilitating the insertion of the insertion pipe 7 into the insertion groove 12. The length of the insertion pipe 7 is the same as the depth of the insertion groove 12, and the insertion pipe 7 just touches the first annular gasket 4, further improving the sealing performance;

[0034] The advantages of the positioning pins 22 and the positioning holes 31 are that when the third annular gasket 3 is arranged on the first flange 2, the third annular gasket 3 is prevented from running off. When the first flange 2 and the second flange 5 are connected, there is no need to support and adjust the third annular gasket 3 by hand, improving the efficiency when the first flange 2 and the second flange 5 are connected, and at the same time improving the sealing performance at the connection of the first flange 2 and the second flange 5. Clamping blocks 52 are fixed on both sides of the second flange 5, clamping grooves 21 are fixed on both sides of the first flange 2, and the clamping blocks 52 are clamped in the clamping grooves 21. When the first flange 2 and the second flange 5 are connected, the clamping blocks 52 are clamped in the clamping grooves 21 to realize the quick alignment and clamping fixation of the first flange 2 and the second flange 5. And at this moment, both hands can be liberated to tighten the first flange 2 and the second flange 5 again with the fastening bolt group 9, improving the installation efficiency;

[0035] The length of the positioning pins 22 is less than that of the positioning holes 31. When the first flange 2 and the second flange 5 are connected, they are tightened by the fastening bolt group 9. During the tightening process, the third annular gasket 3 will be squeezed. When the third annular gasket 3 is squeezed, the sealing performance at the connection of the first flange 2 and the second flange 5 is enhanced. When the third annular gasket 3 is squeezed until the length of the positioning hole 31 is the same as that of the positioning pin, at this moment, the second flange 5 touches the positioning pins 22. The advantage is that it can prevent the third annular gasket 3 from being over-squeezed during tightening, resulting in a reduced service life and damage of the third annular gasket 3.

[0036] Working principle: As Figures 1-6As shown, the first annular gasket 4 is embedded in the first sealing groove 11, the second annular gasket 8 is embedded in the second sealing groove 71, the insertion pipe 7 is inserted into the insertion groove 12, the third annular gasket 3 is arranged between the first flange 2 and the second flange 5, and a number of fastening bolt groups 9 are evenly distributed circumferentially on the first flange 2 and the second flange 5. The fastening bolt groups 9 fasten the first flange 2 and the second flange 5 to make the outer connecting pipe 6 and the valve body 1 be sealed and connected. The beneficial effect of this new type is that when connecting the outer connecting pipe 6 and the valve body 1, it effectively prevents the first annular gasket 4, the second annular gasket 8 and the third annular gasket 3 from running off, improves the sealing performance when connecting the outer connecting pipe 6 and the valve body 1. The insertion pipe 7 is inserted into the insertion groove 12, which can achieve quick insertion. After insertion, the outer connecting pipe 6 and the valve body 1 are preliminarily fixed, which can free both hands and improve the installation efficiency when connecting the outer connecting pipe 6 and the valve body 1. There are positioning pins 22 and positioning holes 31. When the third annular gasket 3 is arranged on the first flange 2, when connecting the first flange 2 and the second flange 5, there is no need to hold and adjust the third annular gasket 3 by hand. At the same time, the positioning pins 22 can prevent the third annular gasket 3 from being excessively squeezed by the first flange 2 and the second flange 5 during fastening, resulting in a reduced service life and damage of the third annular gasket 3. Clamping blocks 52 are fixed on both sides of the second flange 5, and clamping grooves 21 are fixed on both sides of the first flange 2, realizing quick alignment and preliminary clamping fixation of the first flange 2 and the second flange 5, and further improving the installation efficiency.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve with good sealing performance, comprising a valve body (1) and external pipes (6) on both sides of the valve body (1), characterized in that: The valve body (1) is provided with first sealing grooves (11) on both sides, and a first annular sealing gasket (4) is arranged in the first sealing groove (11). The valve body (1) is fixed with first flanges (2) on both sides, and a plug-in groove (12) is formed between the first flanges (2) on both sides and the valve body (1). A second flange (5) is fixed to one side of the external pipe (6), and a plug-in pipe (7) is arranged on the side of the second flange (5) away from the external pipe (6), and a second sealing groove is arranged in the plug-in pipe (7). (71), a second annular sealing gasket (8) is arranged in the second sealing groove (71), the plug-in pipe (7) is inserted in the plug-in groove (12), a third annular sealing gasket (3) is arranged between the first flange (2) and the second flange (5), and a plurality of fastening bolt groups (9) are evenly distributed around the first flange (2) and the second flange (5), and the fastening bolt groups (9) fasten the first flange (2) and the second flange (5) so that the external pipe (6) and the valve body (1) are sealed and connected.

2. A valve with good sealing performance according to claim 1, characterized in that: A plurality of positioning pins (22) are fixed on the circumference of the first flange (2), a plurality of positioning holes (31) are opened on the circumference of the third annular sealing gasket (3), and the third annular sealing gasket (3) is arranged on the first flange (2) so that the positioning pins (22) are inserted into the positioning holes (31).

3. A valve with good sealing performance according to claim 2, characterized in that: The length of the positioning pin (22) is smaller than the length of the positioning hole (31).

4. A valve with good sealing performance according to claim 1, characterized in that: The second flange (5) is fixed with clamping blocks (52) on both sides, the first flange (2) is fixed with clamping grooves (21) on both sides, and the clamping blocks (52) are clamped in the clamping grooves (21).

5. A valve with good sealing performance according to claim 1, characterized in that: A plurality of second through holes (51) are formed on the circumference of the second flange (5), a plurality of first through holes (23) are formed on the circumference of the first flange (2), and a plurality of third through holes (32) are formed on the circumference of the third annular sealing gasket (3). The second through holes (51) are the same in size and number as the first through holes (23) and the third through holes (32).

6. A valve with good sealing performance according to claim 1, characterized in that: The second annular sealing gasket (8) is matched in size to the second sealing groove (71), and the first annular sealing gasket (4) is matched in size to the first sealing groove (11).

7. A valve with good sealing performance according to claim 1, characterized in that: The size of the plug-in tube (7) is adapted to the plug-in slot (12), and the length of the plug-in tube (7) is the same as the depth of the plug-in slot (12).

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