Valve structure

Abstract

The valve structure is internally provided with a fluid channel (O), the valve structure comprises a valve body (1) and a connecting pipe (2) which are in threaded connection, the threaded connection position (A) of the valve body (1) and the connecting pipe (2) is coated with adhesive, the valve structure further comprises a sealing ring (3), and the sealing ring (3) is installed between the valve body (1) and the connecting pipe (2) and is sealed in the circumferential direction so that the adhesive and the fluid channel (O) can be separated. In the embodiment, a fluid channel (O) is formed in the valve structure, a pipeline medium flows through the interior of the fluid channel, the valve body (1) and the connecting pipe (2) are in threaded connection and are reinforced through an adhesive, and the connection reliability of the valve body (1) and the connecting pipe (2) is guaranteed; the sealing ring (3) plays a role in isolating an adhesive from a fluid channel, namely, the sealing ring (3) plays a role in isolating the adhesive from a pipeline medium, so that the pipeline medium is prevented from being polluted by the adhesive as much as possible, and the cleanliness requirement of special pipeline media such as fluorinated liquid and the like is met as much as possible.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a valve structure. Background Art

[0002] With the rise of the liquid cooling industry, the demand for high-purity valve structures continues to increase. The valve structure must have good chemical stability to prevent reactions with pipeline media and the precipitation of harmful substances. Existing valve structures are difficult to meet the purity requirements of special pipeline media. Utility Model Content

[0003] The purpose of this application is to provide a valve structure that minimizes the possibility of pipeline medium contamination and meets the purity requirements of special pipeline media as much as possible.

[0004] In order to solve the above technical problems, the present application provides a valve structure having a fluid channel inside, the valve structure including a valve body and a connecting pipe connected by threads, the threaded connection between the valve body and the connecting pipe is coated with adhesive, the valve structure also includes a sealing ring, the sealing ring is installed between the valve body and the connecting pipe and seals along the circumferential direction to isolate the adhesive from the fluid channel.

[0005] The valve structure of this embodiment has a fluid channel inside, and the pipeline medium flows through the inside of the fluid channel. The valve structure includes a valve body and a connecting pipe. The valve body and the connecting pipe are connected by threads and reinforced with adhesive to ensure the connection reliability of the valve body and the connecting pipe. At the same time, the valve structure of this embodiment is additionally provided with a sealing ring to isolate the adhesive from the fluid channel, that is, the sealing ring plays the role of isolating the adhesive from the pipeline medium, avoiding direct contact between the adhesive and the pipeline medium as much as possible, minimizing the contamination of the pipeline medium by the adhesive as much as possible, and meeting the cleanliness requirements of special pipeline media such as fluorinated liquid as much as possible.

[0006] Optionally, the valve body and the first of the connecting pipes are provided with an annular groove, and the valve body and the second of the connecting pipes are relatively provided with a sealing fitting portion, the radial spacing between the closed end wall of the annular groove and the sealing fitting portion is smaller than the radial width of the sealing ring in a natural state, and the sealing ring is installed in the annular groove and abuts against the sealing fitting portion.

[0007] Optionally, a radial distance L between the free end of the second member and the closed end wall of the annular groove is greater than a radial width of the sealing ring in a natural state.

[0008] Optionally, the second part is further provided with a guide portion, and one end of the sealing fitting portion close to the free end of the second part is connected to the guide portion, and the guide portion extends obliquely in a direction away from the first part along a direction close to the free end of the second part.

[0009] Optionally, the inner wall of the valve body is provided with a first threaded connection portion, and the annular groove is provided on the inner wall of the valve body, and the annular groove is closer to the interior of the valve body than the first threaded connection portion;

[0010] The outer wall of the connecting pipe is provided with a second threaded connection portion, the first threaded connection portion and the second threaded connection portion are threadedly connected, the outer wall of the connecting pipe has a first fitting section, the first fitting section is closer to the free end of the connecting pipe than the second threaded connection portion, and the first fitting section forms the sealing fitting portion.

[0011] Optionally, the outer wall of the connecting pipe further has a first guide section, the first guide section is located at the free end of the connecting pipe, and the radial distance between the free end of the first guide section and the closed end wall of the annular groove is greater than the radial width of the sealing ring in a natural state;

[0012] One end of the first fitting section close to the free end of the connecting pipe is connected to the first guide section. The diameter of the first guide section gradually expands in a direction close to the first fitting section, and the first guide section forms the guide portion.

[0013] And / or, the outer end of the first threaded connection portion has a chamfer.

[0014] Optionally, the inner wall of the valve body is provided with a first threaded connection portion, and the inner wall of the valve body has a second fitting section, the second fitting section is closer to the interior of the valve body than the first threaded connection portion, and the second fitting section forms the sealing fitting portion;

[0015] The outer wall of the connecting pipe is provided with a second threaded connection portion, the first threaded connection portion and the second threaded connection portion are threadedly connected, and the annular groove is provided on the outer wall of the connecting pipe, and the annular groove is closer to the free end of the connecting pipe than the second threaded connection portion.

[0016] Optionally, the inner wall of the valve body further has a second guide section, the second guide section is located between the second fitting section and the first threaded connection portion, the first threaded connection portion is located at the free end of the connecting pipe, and the radial distance between the inner contour of the first threaded connection portion and the closed end wall of the annular groove is greater than the radial width of the sealing ring in a natural state;

[0017] One end of the second fitting section close to the free end of the connecting pipe is connected to the second guide section. The diameter of the second guide section gradually decreases in a direction close to the second fitting section, and the second guide section forms the guide portion.

[0018] Optionally, the outer wall of the valve body is provided with a first threaded connection portion, the inner wall of the connecting pipe is provided with a second threaded connection portion, and the first threaded connection portion and the second threaded connection portion are threadedly connected;

[0019] The outer wall of the valve body is provided with one of the annular groove and the sealing fitting part, and the one of the annular groove and the sealing fitting part is closer to the free end of the valve body than the first threaded connection part, and the inner wall of the connecting pipe is provided with the other of the annular groove and the sealing fitting part, and the second threaded connection part is closer to the free end of the connecting pipe than the other of the annular groove and the sealing fitting part.

[0020] Optionally, the outer wall of the valve body has a third fitting section, the third fitting section is closer to the free end of the valve body than the first threaded connection portion, and the third fitting section forms the sealing fitting portion;

[0021] The outer wall of the valve body has a third guide section, which is located at the free end of the valve body and is connected to one end of the third matching section close to the free end of the valve body. The outer diameter of the third guide section gradually decreases in the direction close to the free end of the valve body. The radial spacing between the free end of the third guide section and the closed end wall of the annular groove is greater than the radial width of the sealing ring in the natural state. The third guide section forms the guide portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of the first specific embodiment of the valve structure provided in this application;

[0023] Figure 2 for Figure 1 A partial enlarged view of the connection between the valve body and the pipe in the valve structure;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the valve body in the valve structure;

[0025] Figure 4 for Figure 2 A partial enlarged view of the valve body;

[0026] Figure 5 for Figure 1 Structural diagram of the connecting pipe in the valve structure;

[0027] Figure 6 This is a structural schematic diagram of a second specific embodiment of the valve structure provided in this application;

[0028] Figure 7 for Figure 6 A partial enlarged view of the connection between the valve body and the pipe in the valve structure;

[0029] Figure 8 for Figure 6 A partial enlarged view of the valve body in the valve structure;

[0030] Figure 9 for Figure 6 Structural diagram of the connecting pipe in the valve structure;

[0031] Figure 10 for Figure 9 A partial enlarged view of the nozzle;

[0032] Figure 11 This is a structural schematic diagram of the third specific embodiment of the valve structure provided in this application;

[0033] Figure 12 for Figure 11 A partial enlarged view of the connection between the valve body and the pipe in the valve structure;

[0034] in, Figures 1-12 The reference numerals in the figures are as follows:

[0035] 1-valve body; 11-first threaded connection portion; 12-second mating section; 13-second guide section; 1A-first abutting wall; 14-third mating section; 15-third guide section;

[0036] 2-pipe; 21-second threaded connection portion; 22-first matching section; 23-first guide section;

[0037] 3- Sealing ring;

[0038] O-fluid channel;

[0039] A-threaded connection;

[0040] a-annular groove; b-sealing fitting portion; c-guide portion; d-chamfer. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Herein, the end closer to the interior of the valve structure is referred to as the “inner end”, and the end farther from the interior of the valve structure is referred to as the “outer end”.

[0043] Please refer to Figure 1-Figure 5 , Figure 1 This is a structural schematic diagram of the first specific embodiment of the valve structure provided in this application; Figure 2 for Figure 1 A partial enlarged view of the connection between the valve body and the pipe in the valve structure; Figure 3 for Figure 1 Schematic diagram of the structure of the valve body in the valve structure; Figure 4 for Figure 2 A partial enlarged view of the valve body; Figure 5 for Figure 1 Schematic diagram of the structure of the connecting pipe in the valve structure.

[0044] This embodiment provides a valve structure having a fluid channel O therein. The valve structure includes a valve body 1 and a connecting pipe 2 that are threadedly connected. The threaded connection A between the valve body 1 and the connecting pipe 2 is coated with an adhesive. The valve structure also includes a sealing ring 3, which is installed between the valve body 1 and the connecting pipe 2 and seals circumferentially to isolate the adhesive from the fluid channel O.

[0045] The valve structure of this embodiment has a fluid channel O inside, and the pipeline medium flows through the inside of the fluid channel O. The valve structure includes a valve body 1 and a connecting pipe 2. The valve body 1 and the connecting pipe 2 are connected by threads and reinforced with an adhesive to ensure the connection reliability of the valve body 1 and the connecting pipe 2. At the same time, the valve structure of this embodiment is additionally provided with a sealing ring 3 to isolate the adhesive from the fluid channel O, that is, the sealing ring 3 serves to isolate the adhesive from the pipeline medium, thereby avoiding direct contact between the adhesive and the pipeline medium as much as possible, minimizing the contamination of the pipeline medium by the adhesive as much as possible, and meeting the cleanliness requirements of special pipeline media such as fluorinated liquid as much as possible.

[0046] Among them, the adhesive can be the thread glue commonly used in this field, which can be used for both bonding and sealing, thereby improving the connection reliability of the valve body 1 and the connecting pipe 2, and improving the sealing performance of the valve structure, thereby avoiding leakage and other problems as much as possible.

[0047] Further, if Figure 2 As shown, in this embodiment, the first of the valve body 1 and the connecting pipe 2 is provided with an annular groove a, and the second of the valve body 1 and the connecting pipe 2 is relatively provided with a sealing fitting portion b. The distance between the closed end wall of the annular groove a and the sealing fitting portion b is smaller than the radial width of the sealing ring 3 in the natural state. The sealing ring 3 is installed in the annular groove a and abuts against the sealing fitting portion b.

[0048] Among them, the end wall of the annular groove a opposite to the open end is the closed end wall of the annular groove a. As set above, the annular groove a serves to accommodate the sealing ring 3, and the sealing ring 3 can only be installed inside the annular groove a, thereby improving the installation stability of the sealing ring 3; at the same time, the distance between the closed end wall of the annular groove a and the sealing matching part b is smaller than the radial width of the sealing ring 3 in the natural state. Therefore, in the installed state, the sealing ring 3 and the sealing matching part b are abutted, and the sealing ring 3 must be in a radial compression state, ensuring that the sealing ring 3 and the valve body 1, and the sealing ring 3 and the connecting pipe 2 can be tightly fitted, thereby improving the sealing reliability between the valve body 1 and the connecting pipe 2, so that the sealing ring 3 can stably play the role of isolating the adhesive and the fluid channel O.

[0049] As can be seen from the above, in the installed state, the sealing ring 3 is in a radially compressed state. Therefore, the axial length of the sealing ring 3 in the installed state will be longer than the axial length of the sealing ring 3 in the natural state. Based on this, in this embodiment, the axial length of the annular groove a is greater than the axial length of the sealing ring 3 in the natural state, so that the annular groove a can also provide a certain deformation space for the sealing ring 3, ensuring that in the installed state, the annular groove a still has sufficient space for installing the sealing ring 3.

[0050] Further, if Figure 2 As shown, in this embodiment, the radial distance L between the free ends of the second one of the valve body 1 and the connecting pipe 2 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in the natural state.

[0051] In this way, when connecting the valve body 1 and the connecting pipe 2, the sealing ring 3 can enter the area between the valve body 1 and the connecting pipe 2 without any hindrance, reducing the difficulty of assembling the valve body 1 and the connecting pipe 2, improving the smoothness of assembling the valve body 1 and the connecting pipe 2, saving assembly time, and improving assembly efficiency.

[0052] Further, if Figure 2 As shown, in this embodiment, the second of the valve body 1 and the connecting pipe 2 is further provided with a guide portion c, and one end of the sealing fitting portion b close to the free end of the second of the valve body 1 and the connecting pipe 2 is connected to the guide portion c, and along the direction close to the free end of the second of the valve body 1 and the connecting pipe 2, the guide portion c extends obliquely in the direction away from the first of the valve body 1 and the connecting pipe 2.

[0053] In other words, the radial spacing between the guide portion c and the closed end wall of the annular groove a gradually increases in the direction approaching the free end of the second one of the valve body 1 and the connecting pipe 2. In this way, the guide portion c can play a guiding role in the assembly process of the valve body 1 and the connecting pipe 2. As the connection area between the valve body 1 and the connecting pipe 2 gradually increases, the sealing ring 3 will gradually slide along the guide portion c and gradually compress in the radial direction until the valve body 1 and the connecting pipe 2 are in a preset connection position, and the sealing ring 3 and the sealing mating portion b come into contact, thereby realizing circumferential sealing of the valve body 1 and the connecting pipe 2.

[0054] As mentioned above, the valve body 1 and the pipe 2 are threadedly connected. Figure 1-Figure 5 In the embodiment shown, the inner wall of the valve body 1 is provided with a first threaded connection portion 11, and an annular groove a is provided on the inner wall of the valve body 1. The annular groove a is closer to the interior of the valve body 1 than the first threaded connection portion 11.

[0055] The outer wall of the connecting pipe 2 is provided with a second threaded connection portion 21, the first threaded connection portion 11 and the second threaded connection portion 21 are threadedly connected, and the outer wall of the connecting pipe 2 has a first fitting section 22. The first fitting section 22 is closer to the free end of the connecting pipe 2 than the second threaded connection portion 21, and the first fitting section 22 forms a sealing fitting portion b.

[0056] It can be seen that in this embodiment, the annular groove a is provided on the inner wall of the valve body 1, the sealing ring 3 is installed on the valve body 1, the outer ring of the sealing ring 3 is in conflict with the closed end wall of the annular groove a, and the annular groove a is closer to the interior of the valve body 1 than the first threaded connection part 11. After the valve body 1 and the connecting pipe 2 are assembled, the first threaded connection part 11 and the second threaded connection part 21 are threadedly connected, and the connecting pipe 2 is partially screwed into the interior of the valve body 1. The sealing ring 3 is in a compressed deformation state in the radial direction, and the inner ring of the sealing ring 3 is in conflict with the first mating section 22 of the connecting pipe 2. Moreover, the sealing ring 3 is closer to the fluid channel O than the threaded connection A between the valve body 1 and the connecting pipe 2, thereby isolating the adhesive and the fluid channel O, and meeting the cleanliness requirements of special pipeline media such as fluorinated liquid as much as possible.

[0057] like Figure 2 and Figure 4 As shown, in this embodiment, the inner wall of the valve body 1 is provided with a first abutment wall 1A facing the first threaded connection part 11. The first abutment wall 1A is closer to the interior of the valve body 1 than the first threaded connection part 11, and an annular groove a is formed between the first abutment wall 1A and the inner end wall of the first threaded connection part 11.

[0058] In this way, the annular groove a can also serve as a tool-retracting groove when machining the first threaded connection portion 11 , thereby facilitating machining of the first threaded connection portion 11 and making the structure of the annular groove a and the first threaded connection portion 11 more compact.

[0059] In some other embodiments, there is a distance between the annular groove a and the first threaded connection portion 11 . In this case, a tool-relief groove may be separately provided on the inner wall of the valve body 1 .

[0060] Please continue to refer to Figure 2 and Figure 4 In this embodiment, the outer end of the first threaded connection portion 11 has a chamfer d to facilitate the matching installation of the first threaded connection portion 11 and the second threaded connection portion 21.

[0061] Please continue to refer to Figure 2 and Figure 5 In this embodiment, the outer wall of the pipe 2 further has a first guide section 23, which is located at the free end of the pipe 2. The radial distance between the free end of the first guide section 23 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in its natural state.

[0062] One end of the first matching section 22 close to the free end of the pipe 2 is connected to the first guide section 23 . The diameter of the first guide section 23 gradually expands in the direction close to the first matching section 22 , forming a guide portion c.

[0063] As set above, the radial spacing between the free end of the first guide section 23 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in the natural state, which facilitates the sealing ring 3 to enter the area between the valve body 1 and the connecting pipe 2 when assembling the valve body 1 and the connecting pipe 2, thereby improving the smoothness of assembly of the valve body 1 and the connecting pipe 2; secondly, the diameter of the first guide section 23 gradually expands in the direction approaching the first mating section 22. In other words, the distance between the first guide section 23 and the closed end wall of the annular groove a gradually decreases in the direction approaching the first mating section 22. The first guide section 23 can play a guiding role. As the connection area between the valve body 1 and the connecting pipe 2 gradually increases, the sealing ring 3 gradually slides along the first guide section 23 and is gradually compressed in the radial direction until the valve body 1 and the connecting pipe 2 are in a preset connection position, and the sealing ring 3 and the sealing mating part b conflict to achieve circumferential reliable sealing of the valve body 1 and the connecting pipe 2.

[0064] Please refer to Figures 6-10 , Figure 6 This is a structural schematic diagram of a second specific embodiment of the valve structure provided in this application; Figure 7 for Figure 6 A partial enlarged view of the connection between the valve body and the pipe in the valve structure; Figure 8 for Figure 6 A partial enlarged view of the valve body in the valve structure; Figure 9 for Figure 6 Structural diagram of the connecting pipe in the valve structure; Figure 10 for Figure 9 A partial enlarged view of the pipe.

[0065] In this embodiment, the inner wall of the valve body 1 is provided with a first threaded connection portion 11, and the inner wall of the valve body 1 has a second mating section 12. The second mating section 12 is closer to the interior of the valve body 1 than the first threaded connection portion 11, and the second mating section 12 forms a sealing mating portion b.

[0066] The outer wall of the connecting pipe 2 is provided with a second threaded connection part 21, the first threaded connection part 11 and the second threaded connection part 21 are threadedly connected, and an annular groove a is provided on the outer wall of the connecting pipe 2, and the annular groove a is closer to the free end of the connecting pipe 2 than the second threaded connection part 21.

[0067] It can be seen that in this embodiment, the annular groove a is provided on the outer wall of the connecting pipe 2, and the sealing ring 3 is installed on the connecting pipe 2. The inner ring of the sealing ring 3 conflicts with the closed end wall of the annular groove a. The annular groove a is closer to the free end of the connecting pipe 2 than the second threaded connection portion 21. After the valve body 1 and the connecting pipe 2 are assembled, the first threaded connection portion 11 and the second threaded connection portion 21 are threadedly connected, and the connecting pipe 2 is partially screwed into the interior of the valve body 1. The sealing ring 3 is in a compressed deformation state in the radial direction, and the outer ring of the sealing ring 3 conflicts with the second mating section 12 of the valve body 1. The sealing ring 3 is closer to the fluid channel O than the threaded connection A between the valve body 1 and the connecting pipe 2, and plays a role in isolating the adhesive and the fluid channel O, so as to meet the cleanliness requirements of special pipeline media such as fluorinated liquid as much as possible.

[0068] Further, if Figure 7 As shown, in this embodiment, the inner wall of the valve body 1 further has a second guide section 13, which is located between the second fitting section 12 and the first threaded connection portion 11. The first threaded connection portion 11 is located at the free end of the pipe 2. The radial distance between the inner contour of the first threaded connection portion 11 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in its natural state.

[0069] One end of the second fitting section 12 close to the free end of the connecting pipe 2 is connected to the second guide section 13 . The diameter of the second guide section 13 gradually decreases in the direction close to the second fitting section 12 , and the second guide section 13 forms a guide portion c.

[0070] As mentioned above, the first threaded connection portion 11 is located at the free end of the connecting pipe 2. Therefore, the radial spacing between the inner contour of the first threaded connection portion 11 and the closed end wall of the annular groove a is also the radial spacing L between the free end of the valve body 1 and the closed end wall of the annular groove a. The radial spacing between the inner contour of the first threaded connection portion 11 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in its natural state, which facilitates the sealing ring 3 to enter the area between the valve body 1 and the connecting pipe 2 when assembling the valve body 1 and the connecting pipe 2, thereby improving the smoothness of assembly of the valve body 1 and the connecting pipe 2. At the same time, , the diameter of the second guide section 13 gradually decreases along the direction approaching the second mating section 12. In other words, the distance between the second guide section 13 and the closed end wall of the annular groove a gradually decreases along the direction approaching the second mating section 12. The second guide section 13 can play a guiding role. As the connection area between the valve body 1 and the connecting pipe 2 gradually increases, the sealing ring 3 gradually slides along the second guide section 13 and is gradually compressed in the radial direction until the valve body 1 and the connecting pipe 2 are in a preset connection position. The sealing ring 3 and the sealing mating portion b come into contact, thereby achieving a reliable circumferential seal between the valve body 1 and the connecting pipe 2.

[0071] Please refer to Figure 11 and Figure 12 , Figure 11This is a structural schematic diagram of the third specific embodiment of the valve structure provided in this application; Figure 12 for Figure 11 A partial enlarged view of the connection between the valve body and the pipe in the valve structure.

[0072] In this embodiment, the pipe 2 is partially threadedly connected to the outside of the valve body 1. Specifically, the outer wall of the valve body 1 is provided with a first threaded connection portion 11, and the inner wall of the pipe 2 is provided with a second threaded connection portion 21. The first threaded connection portion 11 and the second threaded connection portion 21 are threadedly connected.

[0073] The inner wall of the connecting pipe 2 is provided with an annular groove a, and the second threaded connection part 21 is closer to the free end of the connecting pipe 2 than the annular groove a. The outer wall of the valve body 1 is provided with a sealing fitting part b, and the sealing fitting part b is closer to the free end of the valve body 1 than the first threaded connection part 11.

[0074] In this embodiment, the sealing ring 3 is installed on the connecting pipe 2, and the outer ring of the sealing ring 3 is in conflict with the closed end wall of the annular groove a. The second threaded connection part 21 is closer to the free end of the connecting pipe 2 than the annular groove a. After the valve body 1 and the connecting pipe 2 are assembled, the first threaded connection part 11 and the second threaded connection part 21 are threadedly connected, and the connecting pipe 2 is partially screwed to the outside of the valve body 1. The inner ring of the sealing ring 3 is in conflict with the sealing matching part b and is in a compressed deformation state in the radial direction. The sealing ring 3 is closer to the fluid channel O than the threaded connection A between the valve body 1 and the connecting pipe 2, and plays a role in isolating the adhesive and the fluid channel O, so as to meet the cleanliness requirements of special pipeline media such as fluorinated liquid as much as possible.

[0075] Please continue to refer to Figure 12 In this embodiment, the outer wall of the valve body 1 has a third fitting section 14. The third fitting section 14 is closer to the free end of the valve body 1 than the first threaded connection portion 11. The third fitting section 14 forms a sealing fitting portion b.

[0076] The outer wall of the valve body 1 has a third guide section 15, which is located at the free end of the valve body 1 and is connected to the end of the third matching section 14 close to the free end of the valve body 1. The outer diameter of the third guide section 15 gradually decreases in the direction close to the free end of the valve body 1. The radial spacing between the free end of the third guide section 15 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in its natural state. The third guide section 15 forms a guide portion c.

[0077] As set above, the third guide section 15 is located at the free end of the valve body 1, and the radial spacing between the free end of the third guide section 15 and the closed end wall of the annular groove a is greater than the radial width of the sealing ring 3 in the natural state, which facilitates the sealing ring 3 to enter the area between the valve body 1 and the connecting pipe 2 when assembling the valve body 1 and the connecting pipe 2, thereby improving the smoothness of assembly of the valve body 1 and the connecting pipe 2; at the same time, the outer diameter of the third guide section 15 gradually shrinks in the direction approaching the free end of the valve body 1. In other words, in the direction approaching the third fitting section 14, the distance between the third guide section 15 and the closed end wall of the annular groove a gradually decreases, and the third guide section 15 can play a guiding role. As the connection area between the valve body 1 and the connecting pipe 2 gradually increases, the sealing ring 3 gradually slides along the third guide section 15 and is gradually compressed in the radial direction until the valve body 1 and the connecting pipe 2 are in a preset connection position, and the sealing ring 3 and the sealing fitting part b conflict to achieve circumferential reliable sealing of the valve body 1 and the connecting pipe 2.

[0078] In other embodiments of the present application, a sealing mating portion b is provided on the inner wall of the connecting pipe 2, and the second threaded connection portion 21 is closer to the free end of the connecting pipe 2 than the sealing mating portion b. An annular groove a is provided on the outer wall of the valve body 1, and the annular groove a is closer to the free end of the valve body 1 than the first threaded connection portion 11. In this manner, the sealing ring 3 is installed on the valve body 1, and the inner ring of the sealing ring 3 abuts against the closed end wall of the annular groove a. After the valve body 1 and the connecting pipe 2 are assembled, the first threaded connection portion 11 and the second threaded connection portion 21 are threadedly connected, and the connecting pipe 2 is partially screwed onto the outside of the valve body 1. The outer ring of the sealing ring 3 abuts against the sealing mating portion b and is in a radially compressed and deformed state. The sealing ring 3 is closer to the fluid channel O than the threaded connection A between the valve body 1 and the connecting pipe 2, thereby isolating the adhesive from the fluid channel O and meeting the cleanliness requirements of special pipeline media such as fluorinated liquids as much as possible.

[0079] To sum up, the outer wall of the valve body 1 can be provided with one of the annular groove a and the sealing fitting part b, and one of the annular groove a and the sealing fitting part b is closer to the free end of the valve body 1 than the first threaded connection part 11, and the inner wall of the connecting pipe 2 can be provided with the other of the annular groove a and the sealing fitting part b, and the second threaded connection part 21 is closer to the free end of the connecting pipe 2 than the other of the annular groove a and the sealing fitting part b.

[0080] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A valve structure, characterized in that: A fluid passage (O) is provided inside the valve structure, the valve structure comprising a valve body (1) and a connecting pipe (2) connected by threads, the threaded connection (A) between the valve body (1) and the connecting pipe (2) being coated with adhesive, the valve structure further comprising a sealing ring (3), the sealing ring (3) being installed between the valve body (1) and the connecting pipe (2) and sealing along the circumferential direction to isolate the adhesive from the fluid passage (O).

2. The valve structure according to claim 1, characterized in that: The first of the valve body (1) and the connecting pipe (2) is provided with an annular groove (a), and the second of the valve body (1) and the connecting pipe (2) is relatively provided with a sealing fitting portion (b), the radial spacing between the closed end wall of the annular groove (a) and the sealing fitting portion (b) is smaller than the radial width of the sealing ring (3) in a natural state, and the sealing ring (3) is installed in the annular groove (a) and abuts against the sealing fitting portion (b).

3. The valve structure according to claim 2, characterized in that: The radial distance L between the free end of the second and the closed end wall of the annular groove (a) is greater than the radial width of the sealing ring (3) in its natural state.

4. The valve structure according to claim 3, characterized in that: The second part is further provided with a guide portion (c), and one end of the sealing fitting portion (b) close to the free end of the second part is connected to the guide portion (c), and the guide portion (c) extends obliquely in a direction away from the first part along a direction close to the free end of the second part.

5. The valve structure according to claim 4, characterized in that: The inner wall of the valve body (1) is provided with a first threaded connection portion (11), and the annular groove (a) is provided on the inner wall of the valve body (1), and the annular groove (a) is closer to the interior of the valve body (1) than the first threaded connection portion (11); The outer wall of the connecting pipe (2) is provided with a second threaded connection portion (21), the first threaded connection portion (11) and the second threaded connection portion (21) are threadedly connected, the outer wall of the connecting pipe (2) has a first fitting section (22), the first fitting section (22) is closer to the free end of the connecting pipe (2) than the second threaded connection portion (21), and the first fitting section (22) forms the sealing fitting portion (b).

6. The valve structure according to claim 5, characterized in that: The outer wall of the connecting pipe (2) further comprises a first guide section (23), the first guide section (23) being located at the free end of the connecting pipe (2), and the radial distance between the free end of the first guide section (23) and the closed end wall of the annular groove (a) being greater than the radial width of the sealing ring (3) in its natural state; One end of the first fitting section (22) close to the free end of the connecting pipe (2) is connected to the first guide section (23), and the diameter of the first guide section (23) gradually expands in a direction close to the first fitting section (22), so that the first guide section (23) forms the guide portion (c); And / or, the outer end of the first threaded connection portion (11) has a chamfer (d).

7. The valve structure according to claim 4, characterized in that: The inner wall of the valve body (1) is provided with a first threaded connection portion (11), and the inner wall of the valve body (1) has a second fitting section (12), the second fitting section (12) being closer to the interior of the valve body (1) than the first threaded connection portion (11), and the second fitting section (12) forming the sealing fitting portion (b); The outer wall of the connecting pipe (2) is provided with a second threaded connection portion (21), the first threaded connection portion (11) and the second threaded connection portion (21) are threadedly connected, and the annular groove (a) is provided on the outer wall of the connecting pipe (2), and the annular groove (a) is closer to the free end of the connecting pipe (2) than the second threaded connection portion (21).

8. The valve structure according to claim 7, characterized in that: The inner wall of the valve body (1) further comprises a second guide section (13), the second guide section (13) being located between the second fitting section (12) and the first threaded connection portion (11), the first threaded connection portion (11) being located at the free end of the connecting pipe (2), the radial spacing between the inner contour of the first threaded connection portion (11) and the closed end wall of the annular groove (a) being greater than the radial width of the sealing ring (3) in its natural state; One end of the second fitting section (12) close to the free end of the connecting pipe (2) is connected to the second guide section (13), and the diameter of the second guide section (13) gradually decreases in a direction close to the second fitting section (12), so that the second guide section (13) forms the guide portion (c).

9. The valve structure according to claim 4, characterized in that: The outer wall of the valve body (1) is provided with a first threaded connection portion (11), and the inner wall of the connecting pipe (2) is provided with a second threaded connection portion (21), and the first threaded connection portion (11) and the second threaded connection portion (21) are threadedly connected; The outer wall of the valve body (1) is provided with one of the annular groove (a) and the sealing fitting portion (b), and one of the annular groove (a) and the sealing fitting portion (b) is closer to the free end of the valve body (1) than the first threaded connection portion (11); The inner wall of the connecting pipe (2) is provided with the other of the annular groove (a) and the sealing fitting portion (b), and the second threaded connection portion (21) is closer to the free end of the connecting pipe (2) than the other of the annular groove (a) and the sealing fitting portion (b).

10. The valve structure according to claim 9, characterized in that: The outer wall of the valve body (1) has a third fitting section (14), the third fitting section (14) being closer to the free end of the valve body (1) than the first threaded connection portion (11), and the third fitting section (14) forming the sealing fitting portion (b); The outer wall of the valve body (1) has a third guide section (15), the third guide section (15) is located at the free end of the valve body (1), and is connected to one end of the third matching section (14) close to the free end of the valve body (1), the outer diameter of the third guide section (15) gradually decreases in the direction close to the free end of the valve body (1), the radial distance between the free end of the third guide section (15) and the closed end wall of the annular groove (a) is greater than the radial width of the sealing ring (3) in its natural state, and the third guide section (15) forms the guide portion (c).

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