Hydraulic and pneumatic guide switching valve convenient to assemble

Abstract

The utility model provides a hydraulic and pneumatic guide switching valve convenient to assemble, which comprises a switching valve upper shell and a switching valve lower shell, mounting flanges are fixedly connected between the switching valve upper shell and the switching valve lower shell, the two mounting flanges are fixedly connected through bolts, a sealing assembly is arranged between the two mounting flanges, and the sealing assembly is fixedly connected with the switching valve upper shell through bolts. By means of the design, the problems that in an original device, parts in the hydraulic and pneumatic guide switching valve are replaced conveniently through bolt disassembly and assembly, but gaps can be formed between shells of the switching valve due to misoperation in the installation process, and then use of the switching valve is affected are solved, and the hydraulic and pneumatic guide switching valve is reasonable in structure, good in practicability and suitable for popularization and application. According to the switching valve, the sealing assembly is installed between the two installation flanges, the blocking ring can abut against the gap between the two installation flanges under the elastic acting force of the springs, and therefore the sealing effect of the switching valve upper shell and the switching valve lower shell is improved, and when the switching valve is used, leakage can be avoided.

Description

Technical Field

[0001] The utility model relates to a liquid-gas pressure guide switching valve which is easy to assemble and belongs to the technical field of switching valve equipment. Background Art

[0002] At present, the hydraulic-gas pressure-guided switching valve is a valve that opens the corresponding end passage according to the direction of the pressure source. The switching valve (forced valve) is a pneumatic switching valve installed at the hot end of the switching heat exchanger (or cold accumulator). The switching valve is controlled by the signal compressed air through the solenoid valve. According to the different functions in the process, there are air and dirty nitrogen switching valves, pure nitrogen suppression valves, dirty nitrogen three-way valves, etc. According to the structural type, there are vertical and horizontal types. Vertical switching valves can be divided into air-open type and air-closed type. The air-open type means that when the signal compressed air is cut off, the valve disc can automatically open by its own weight; otherwise, it is air-closed type. The choice of air-open or air-closed is determined by the safety of the device. Nitrogen switching valves are air-open type, and air switching valves are air-closed type.

[0003] Publication number: CN219388750U, mentions a liquid-gas pressure guide switching valve that is easy to assemble. By adding a through rod, a fixing bolt, a fixing disc, a locking bolt and a locking nut, it is possible to separate the No. 1 valve body shell and the No. 2 valve body shell by only loosening the fixing bolt and the locking bolt, which is more convenient and quick when replacing the internal parts of the switching valve. However, this device is disassembled and assembled by bolts to replace the internal parts of the liquid-gas pressure guide switching valve. However, due to improper operation during the installation process, gaps will appear between the switching valve shells, which will affect the use of the switching valve. Now there is an urgent need for a liquid-gas pressure guide switching valve that is easy to assemble to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a liquid-gas pressure-guided switching valve that is easy to assemble, so as to solve the problems raised in the above-mentioned background technology. The present invention has good practicality. By installing the sealing assembly between the two mounting flanges, the blocking ring will press against the gap between the two mounting flanges under the elastic force of multiple springs, thereby increasing the sealing effect of the upper shell and the lower shell of the switching valve, and avoiding leakage when using the switching valve.

[0005] To achieve the above-mentioned object, the present invention is implemented through the following technical solution: a liquid-gas pressure pilot switching valve that is easy to assemble, comprising a switching valve upper housing and a switching valve lower housing, wherein the switching valve upper housing and the switching valve lower housing are both fixedly connected with a mounting flange, and the two mounting flanges are fixedly connected by bolts;

[0006] A sealing assembly is arranged between the two mounting flanges, and the sealing assembly includes a placement groove, an annular groove, a blocking ring, a docking ring, multiple springs, two limiting rings, a mounting sleeve and a retaining ring. The placement groove is opened between the two mounting flanges, and the annular grooves are respectively opened between the two mounting flanges. The blocking ring is slidably connected in the placement groove, and the docking ring is slidably connected in the placement groove. Multiple springs are fixedly connected between the blocking ring and the docking ring, the two limiting rings are fixedly connected to the upper and lower ends of the docking ring, and the two docking rings are respectively slidably connected in the two annular grooves. The mounting sleeve is fixedly connected to the circumferential inner wall of the lower shell of the switching valve, and the retaining ring is slidably connected between the mounting sleeve and the lower shell of the switching valve.

[0007] Furthermore, a mounting groove is provided at the upper end of one of the mounting flanges, and a sealing ring is provided in the mounting groove.

[0008] Furthermore, a protective ring is fixedly connected to the inner circumference of the upper shell of the switching valve, and the protective ring and the mounting sleeve are adsorbed on each other.

[0009] Furthermore, a plurality of positioning pins are fixedly connected to the upper end of one of the mounting flanges, a plurality of positioning holes are opened at the lower end of the upper shell of the switching valve, and the plurality of positioning pins are slidably connected to the plurality of positioning holes respectively.

[0010] Furthermore, the blocking ring and the docking ring are made of elastic material, and the retaining ring is made of rigid material.

[0011] Furthermore, the two limiting rings are respectively slidably connected in the annular groove, and the blocking ring is fitted at the connection between the two mounting flanges.

[0012] The beneficial effects of the utility model: the utility model is a liquid-gas pressure guide switching valve which is easy to assemble. Since the utility model adds a blocking ring, a docking ring, a spring and a limit ring, our design improvement and actual use have shown that the device has a reasonable structure and good practicality. By installing the sealing assembly between the two mounting flanges, the blocking ring will press against the gap between the two mounting flanges under the elastic force of multiple springs, thereby increasing the sealing effect of the upper shell and the lower shell of the switching valve, and can avoid leakage when using the switching valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a liquid-gas pressure pilot switching valve that is easy to assemble in the utility model;

[0015] Figure 2This is a partial cross-sectional structural diagram of a liquid-gas pressure pilot switching valve that is easy to assemble according to the present invention;

[0016] Figure 3 This utility model is a hydraulic and gas pressure guide switching valve that is easy to assemble Figure 2 Schematic diagram of the structure at A in the middle;

[0017] Figure 4 This is a schematic diagram of the internal structure of the lower housing of a switching valve in a liquid-gas pressure-guided switching valve that is easy to assemble according to the present invention;

[0018] Figure 5 This is a schematic diagram of the internal structure of the upper housing of a switching valve in a liquid-gas pressure-guided switching valve that is easy to assemble according to the present invention;

[0019] Figure 6 The utility model is a schematic diagram of a partial cross-sectional structure of a lower shell of a switching valve in a liquid-gas pressure-guided switching valve that is easy to assemble.

[0020] In the figure: 1-switching valve upper housing, 2-switching valve lower housing, 3-mounting flange, 4-sealing ring, 5-blocking ring, 6-spring, 7-docking ring, 8-limiting ring, 9-blocking ring, 10-mounting sleeve, 11-protective ring, 12-annular groove, 13-locating pin, 14-locating hole, 15-mounting groove, 16-placement groove. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figures 1-6The utility model provides a technical solution: a liquid-gas pressure guide switching valve that is easy to assemble, including a switching valve upper shell 1 and a switching valve lower shell 2, a mounting flange 3 is fixedly connected between the switching valve upper shell 1 and the switching valve lower shell 2, the two mounting flanges 3 are fixedly connected by bolts, and a sealing assembly is arranged between the two mounting flanges 3, the sealing assembly includes a placement groove 16, an annular groove 12, a blocking ring 5, a docking ring 7, a plurality of springs 6, two limit rings 8, a mounting sleeve 10 and a retaining ring 9, the placement groove 16 is opened between the two mounting flanges 3, the annular grooves 12 are respectively opened between the two mounting flanges 3, the blocking ring 5 is slidably connected to the placement groove 16, the annular grooves 12 are respectively opened between the two mounting flanges 3, and the blocking ring 5 is slidably connected to the placement groove 16. The docking ring 7 is slidably connected in the placement groove 16, multiple springs 6 are fixedly connected between the blocking ring 5 and the docking ring 7, two limit rings 8 are fixedly connected to the upper and lower ends of the docking ring 7, and the two docking rings 7 are slidably connected in the two annular grooves 12 respectively. The mounting sleeve 10 is fixedly connected to the circumferential inner wall of the lower shell 2 of the switching valve, and the retaining ring 9 is slidably connected between the mounting sleeve 10 and the lower shell 2 of the switching valve. This design solves the problem that the original device is disassembled and assembled by bolts in order to replace the internal parts of the liquid-gas pressure guide switching valve, but improper operation during the installation process will cause gaps between the switching valve shells, thereby affecting the use of the switching valve.

[0023] As the first embodiment of the present invention: a mounting groove 15 is provided at the upper end of one of the mounting flanges 3, and a sealing ring 4 is provided in the mounting groove 15. The mounting groove 15 provided on the surface of the mounting flange 3 can be used to install the sealing ring 4, thereby increasing the sealing between the two mounting flanges 3. The sealing ring 4 installed between the two mounting flanges 3 can increase the sealing effect between the switching valve upper shell 1 and the switching valve lower shell 2, prevent external equipment from entering the switching valve upper shell 1 and the switching valve lower shell 2, and at the same time avoid affecting the normal operation of the internal parts of the switching valve upper shell 1 and the switching valve lower shell 2. A protective ring 11 is fixedly connected to the inner circumference of the switching valve upper shell 1. The protective ring 11 and the mounting sleeve 10 are mutually adsorbed. The protective ring 11 installed in the switching valve upper shell 1 can increase the connection effect between the protective ring 11 and the mounting sleeve 10 by being mutually adsorbed and connected with the mounting sleeve 10, and can also protect the retaining ring 9 and the docking ring 7. A plurality of positioning pins 13 are fixedly connected to the upper end of one of the mounting flanges 3, and a plurality of positioning holes 14 are provided at the lower end of the switching valve upper shell 1. The plurality of positioning pins 13 are slidably connected to the plurality of positioning holes 14. The positioning pins 13 installed on the mounting flange 3 slide into the positioning holes 14, so that the switching valve upper shell 1 and the switching valve lower shell 2 can be matched and connected, thereby achieving the installation of the switching valve upper shell 1 and the switching valve lower shell 2. The blocking ring 5 and the docking ring 7 are made of elastic material, and the retaining ring 9 is made of rigid material. The blocking ring 5 can seal the gap between the two mounting flanges 3 while facilitating the installation of the blocking ring 5 and the docking ring 7 in the two mounting flanges 3. The retaining ring 9 is made of rigid material and can effectively limit the docking ring 7 to the placement groove 16, thereby achieving the positioning installation of the docking ring 7. The two limiting rings 8 are respectively slidably connected in the annular groove 12, and the blocking ring 5 is attached to the connection between the two mounting flanges 3. The two limiting rings 8 can limit the docking ring 7 in the placement groove 16 by sliding in the annular groove 12. The blocking ring 5 is pressed between the two mounting flanges 3 under the elastic force of the spring 6, thereby sealing the gap between the two mounting flanges 3.

[0024] As the second embodiment of the present invention: when the switching valve upper shell 1 and the switching valve lower shell 2 are assembled and installed, first support the blocking ring 5 and the docking ring 7 and install them in the placement groove 16, slide the limit rings 8 at the upper and lower ends of the docking ring 7 into the annular groove 12 respectively, and then slide the retaining ring 9 between the mounting sleeve 10 and the mounting flange 3, so that the retaining ring 9 limits the docking ring 7 to the placement groove 16, and then dock the positioning hole 14 at the bottom of the switching valve upper shell 1 with the positioning pin 13, and then fix it with bolts. The blocking ring 5 will be sealed in the connection gap between the two mounting flanges 3 under the elastic force of the spring 6, and at the same time, the protective ring 11 and the mounting sleeve 10 are adsorbed and connected to each other, which can prevent the parts in the switching valve upper shell 1 from affecting the retaining ring 9. When replacing the switching valve, the switching valve upper shell 1 and the switching valve lower shell 2 can be separated by bolts, and then the sealing assembly can be taken out.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A liquid-gas pressure-guided switching valve that is easy to assemble, comprising a switching valve upper housing (1) and a switching valve lower housing (2), characterized in that: A mounting flange (3) is fixedly connected between the switching valve upper housing (1) and the switching valve lower housing (2), and the two mounting flanges (3) are fixedly connected by bolts; A sealing assembly is provided between the two mounting flanges (3), and the sealing assembly includes a placement groove (16), an annular groove (12), a blocking ring (5), a docking ring (7), a plurality of springs (6), two limiting rings (8), a mounting sleeve (10) and a retaining ring (9). The placement groove (16) is provided between the two mounting flanges (3), the annular groove (12) is provided between the two mounting flanges (3), the blocking ring (5) is slidably connected in the placement groove (16), the docking ring (7) is slidably connected in the placement groove (16), the plurality of springs (6) are fixedly connected between the blocking ring (5) and the docking ring (7), the two limiting rings (8) are fixedly connected to the upper and lower ends of the docking ring (7), the two docking rings (7) are slidably connected in the two annular grooves (12), the mounting sleeve (10) is fixedly connected to the circumferential inner wall of the switching valve lower shell (2), and the retaining ring (9) is slidably connected between the mounting sleeve (10) and the switching valve lower shell (2).

2. The easy-to-assemble liquid-gas pressure pilot switching valve according to claim 1, characterized in that: A mounting groove (15) is provided at the upper end of one of the mounting flanges (3), and a sealing ring (4) is provided in the mounting groove (15).

3. The easy-to-assemble hydraulic-gas pressure-guided switching valve according to claim 1, characterized in that: A protective ring (11) is fixedly connected to the inner circumference of the switching valve upper shell (1), and the protective ring (11) and the mounting sleeve (10) are adsorbed on each other.

4. The easy-to-assemble hydraulic-gas pressure-guided switching valve according to claim 1, characterized in that: A plurality of positioning pins (13) are fixedly connected to the upper end of one of the mounting flanges (3), a plurality of positioning holes (14) are opened at the lower end of the switching valve upper shell (1), and the plurality of positioning pins (13) are respectively slidably connected to the plurality of positioning holes (14).

5. The easy-to-assemble hydraulic-gas pressure-guided switching valve according to claim 1, characterized in that: The blocking ring (5) and the docking ring (7) are made of elastic material, and the retaining ring (9) is made of rigid material.

6. The easy-to-assemble hydraulic-gas pressure-guided switching valve according to claim 1, characterized in that: The two limiting rings (8) are respectively slidably connected in the annular groove (12), and the blocking ring (5) is fitted at the connection between the two mounting flanges (3).

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