Pressure reducing valve

Abstract

The utility model provides a pressure reducing valve, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The pressure reducing valve comprises a valve body with a cavity inside, an inlet connecting pipe and an outlet connecting pipe which are communicated with an inner cavity of the valve body are arranged at the left end and the right end of the valve body respectively, and the pressure reducing valve further comprises a valve rod, a sealing assembly and a pressure adjusting assembly. The middle of the valve rod penetrates through the partition plate, the pressure adjusting assembly is located in the first cavity and connected with the upper portion of the valve rod, and the sealing assembly is located in the second cavity and connected with the lower portion of the valve rod. The pressure reducing valve is high in stability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to a pressure reducing valve. BACKGROUND

[0002] Pressure reducing valves are used to reduce the pressure in a fluid pipe, ensuring that the pressure downstream remains within a set safety range. They are widely used in water supply systems, gas systems, industrial process control, and many other applications that require stable pressure.

[0003] The existing pressure reducing valve usually directly changes the pressure output by controlling the opening degree of the valve. However, the opening degree of the valve cannot be directly observed, and only the pressure in the pipe can be checked for pressure feedback to the operator, making the operation not very convenient. Moreover, the pressure control is not accurate during actual operation, and the pressure reducing stability is poor.

[0004] Chinese patent CN1094212C discloses a pressure reducing valve, which basically comprises a housing 28. The housing defines a fluid passage 26 connecting a primary orifice 22 and a secondary orifice 24; a cap 30 mounted on the upper part of the housing 28; and a handle 32 rotatably supported on the upper part of the cap 30. A valve guide 36 is sealingly fitted in the lower part of the housing 28, and a sealing element 34 is clamped therebetween. The housing 28 and the cap 30 jointly serve as a pressure reducing valve housing.

[0005] The housing 28 contains a valve body 42, which can be opened, i.e. moved away from a seat (first seat) 40 against the bias of a valve spring 38, to form fluid communication between the primary orifice 22 and the secondary orifice 24. A vertical stem 44 has a lower end connected to the central region of the upper end of the valve body 42. The valve body 42 supports a cushioning elastic ring 46, which is fitted in an annular groove defined in the upper end of the valve body 42. The cushioning elastic ring 46 can abut against the seat 40 to cushion the shock generated when the valve body 42 is closed, i.e. abuts against the seat 40. The stem 44 is cylindrical, and has a flat surface 50 at its upper end, which is in point contact with the spherical surface of a ball (spherical body) 48.

[0006] A horizontal diaphragm 52 is arranged between the housing 28 and the cap 30. The diaphragm 52 and the housing 28 jointly define a diaphragm chamber 54 therebetween, which is in communication with the secondary orifice 24 through a passage 56.

[0007] As can be seen, the above-mentioned pressure reducing valve directly changes the pressure by the opening degree of the valve stem. Since the flow direction of the fluid medium in the valve body is perpendicular to the moving direction of the valve stem, this structure will cause the valve stem to bear excessive load, and the entire pressure reducing valve will be damaged prematurely during long-term use, and its stability is poor. SUMMARY

[0008] The utility model discloses a high stability and compact structure pressure reducing valve.

[0009] The utility model discloses a high stability and compact structure pressure reducing valve.

[0010] A pressure reducing valve, including the valve body of empty cavity, the left and right two ends of valve body have the inlet pipe and the outlet pipe with its inner chamber communication respectively, it is characterized by, still including valve rod, sealing assembly and pressure regulating assembly, the valve body has the baffle in and the baffle divides the valve body into two cavities that are adjacent to each other in the upper and lower place: cavity one and the cavity two in the lower part of cavity one, the middle part of above-mentioned valve rod is arranged on the baffle, above-mentioned pressure regulating assembly is located at cavity one and adjusts the pressure assembly and the upper part of valve rod are connected, above-mentioned sealing assembly is located at cavity two and sealing assembly and the lower part of valve rod are connected.

[0011] In the above-mentioned pressure reducing valve, the pressure regulating assembly includes adjusting cylinder, adjusting block, baffle disc and spring, the adjusting cylinder is located on the upper part of valve body and the adjusting cylinder is communicated with cavity one, the adjusting block is embedded in the adjusting cylinder and both are threadedly connected, the baffle disc is fixedly connected on the valve rod, the spring is sleeved on the valve rod, and the two ends of the spring act on the baffle disc and the baffle respectively.

[0012] In the above-mentioned pressure reducing valve, the sealing assembly includes sealing cylinder and sealing block, the sealing cylinder and the sealing block are located in the inlet pipe, the sealing cylinder is fixedly connected with the inlet pipe, and the sealing block is movably connected with the lower end of the valve rod.

[0013] In the above-mentioned pressure reducing valve, the sealing block side and the inlet pipe have a water gap.

[0014] In the above-mentioned pressure reducing valve, the inlet pipe includes pipe body one and pipe body two, the pipe body one is located on the side of the valve body, the pipe body two is threadedly connected with the pipe body one, and the sealing cylinder is tightly pressed between the pipe body one and the pipe body two.

[0015] In the above-mentioned pressure reducing valve, the middle part of the adjusting block has an avoiding hole, and the upper end of the valve rod is arranged in the avoiding hole.

[0016] In the above-mentioned pressure reducing valve, a connecting rod is further included, the middle part of the connecting rod is hinged in the valve body, the lower end of the valve rod has a pull hole one, the sealing block has a pull hole two, the two ends of the connecting rod are respectively a buckling segment one and a buckling segment two, the buckling segment one is movably connected at the pull hole one, and the buckling segment two is movably connected at the pull hole two.

[0017] In the above-mentioned pressure reducing valve, the buckling segment one is in the shape of a long rod, and the buckling segment one is vertically arranged with the connecting rod.

[0018] In the pressure reducing valve, the second buckling section is hook-shaped and is embedded in the second pull hole.

[0019] In the pressure reducing valve, the middle part of the connecting rod has a hinge part protruding to the side part thereof, and the hinge part is hinged in the valve body through a pin.

[0020] Compared with the prior art, the pressure reducing valve controls the opening and closing degree of the sealing assembly through the pressure adjusting assembly, so that the pressure control purpose is achieved. The pressure adjusting operation only needs to operate the pressure adjusting assembly, and the operation is simple.

[0021] Meanwhile, the pressure adjusting assembly and the sealing assembly are connected through a mechanical connecting rod mechanism, the transmission stability is high, and the stability of the whole pressure reducing valve is effectively improved.

[0022] The pressure adjusting assembly and the sealing assembly are located in the valve body, the whole structure of the pressure reducing valve is compact, and has high practical value.

[0023] In addition, the moving direction of the sealing block is the same as the flowing direction of the fluid medium, and the gap at the sealing assembly can be constantly guaranteed even after long time use. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of the three-dimensional structure of the pressure reducing valve.

[0025] Figure 2 is a schematic view of the sectional structure of the pressure reducing valve.

[0026] In the figure, 1 is a valve body, 2 is an inlet connector, 2a is a pipe body one, 2b is a pipe body two, 3 is an outlet connector, 4 is a partition plate, 5 is an adjusting cylinder, 6 is an adjusting block, 6a is an avoiding hole, 7 is a baffle disc, 8 is a spring, 9 is a sealing cylinder, 10 is a sealing block, 10a is a second pull hole, 11 is a connecting rod, 11a is a first buckling section, 11b is a second buckling section, 11c is a hinge part, 12 is a valve rod, and 12a is a first pull hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there can be a middle component. When a component is referred to as being "provided on" another component, it can be directly provided on the other component or there can be a middle component. When a component is referred to as being "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0030] As shown in Figure 1 and Figure 2 The pressure reducing valve comprises a valve body 1 with an inner cavity, an inlet pipe 2 and an outlet pipe 3 at the left and right ends of the valve body 1 respectively, a valve rod 12, a sealing assembly and a pressure regulating assembly, the valve body 1 has a partition plate 4 inside and the partition plate 4 divides the valve body 1 into two cavities: cavity one and cavity two below cavity one, the valve rod 12 is arranged in the partition plate 4, the pressure regulating assembly is arranged in cavity one and connected with the upper part of the valve rod 12, and the sealing assembly is arranged in cavity two and connected with the lower part of the valve rod 12.

[0031] The pressure regulating assembly comprises a regulating cylinder 5, a regulating block 6, a stop disc 7 and a spring 8, the regulating cylinder 5 is arranged in the upper part of the valve body 1 and communicates with cavity one, the regulating block 6 is embedded in the regulating cylinder 5 and they are threadedly connected, the stop disc 7 is fixed on the valve rod 12, and the spring 8 is sleeved on the valve rod 12 and the two ends of the spring 8 act on the stop disc 7 and the partition plate 4 respectively, and the valve rod 12 has a tendency to move upward under the elastic force of the spring 8.

[0032] The sealing assembly comprises a sealing cylinder 9 and a sealing block 10, the sealing cylinder 9 and the sealing block 10 are both arranged in the inlet pipe 2, the sealing cylinder 9 is fixed on the inlet pipe 2, and the sealing block 10 is movably connected with the lower end of the valve rod 12.

[0033] There is a gap between the sealing block 10 and the inlet pipe 2, and the fluid medium can enter the valve body 1 through the gap between the sealing cylinder 9, the sealing block 10 and the inlet pipe 2 in sequence.

[0034] In the initial state, the sealing block 10 is acted on by the valve rod 12 to ensure that the sealing block 10 and the sealing cylinder 9 maintain a set distance.

[0035] The pressure reducing valve changes the output pressure by changing the distance between the sealing block 10 and the sealing cylinder 9.

[0036] Specifically, after the adjusting block 6 moves, the valve rod 12 moves together. Since the valve rod 12 is connected with the sealing block 10, the distance between the sealing block 10 and the sealing cylinder 9 is effectively changed.

[0037] The spring 8 ensures that the valve rod 12 always has an upward tendency, and the fluid medium acting on the valve rod 12 during the process of passing through the valve body 1 ensures that the valve rod 12 will not naturally fall.

[0038] The baffle 4 has two functions:

[0039] First, the pressure regulating assembly is located in cavity one, and the sealing assembly is located in cavity two, so as to avoid mutual interference between the sealing assembly and the pressure regulating assembly.

[0040] Second, the movement of the valve rod 12 is properly guided to avoid deflection during the movement of the valve rod 12.

[0041] The sealing block 10 side has a water passage gap with the inlet pipe 2.

[0042] When the sealing block 10 moves away from the sealing cylinder 9, the fluid medium can enter the valve body 1 stably through the water passage gap.

[0043] The inlet pipe 2 includes a pipe body one 2a and a pipe body two 2b, the pipe body one 2a is located at the side of the valve body 1, the pipe body two 2b is threadedly connected with the pipe body one 2a, and the sealing cylinder 9 is tightly pressed between the pipe body one 2a and the pipe body two 2b.

[0044] The split structure of the pipe body one 2a and the pipe body two 2b can stably position the sealing cylinder 9 at the inlet pipe 2.

[0045] The adjusting block 6 has a avoiding hole 6a in the middle, and the upper end of the valve rod 12 is arranged in the avoiding hole 6a.

[0046] Such structure can make the length of the valve rod 12 as long as possible, so as to ensure that it has a relatively large pressure regulating range.

[0047] It also includes a connecting rod 11, the connecting rod 11 is hingedly connected in the valve body 1, the lower end of the valve rod 12 has a pulling hole one 12a, the sealing block 10 has a pulling hole two 10a, and the two ends of the connecting rod 11 are respectively a buckling segment one 11a and a buckling segment two 11b, the buckling segment one 11a is movably connected in the pulling hole one 12a, and the buckling segment two 11b is movably connected in the pulling hole two 10a.

[0048] The first buckling segment 11a is movably connected with the first pull hole 12a, and the second buckling segment 11b is movably connected with the second pull hole 10a, so that the power can be stably transmitted to the sealing block 10 during the movement of the valve rod 12.

[0049] The first buckling segment 11a is in the shape of a long rod and is vertically arranged with the connecting rod 11.

[0050] The structure can shorten the length of the connecting rod as much as possible.

[0051] The second buckling segment 11b is in the shape of a hook and is embedded in the second pull hole 10a.

[0052] The middle part of the connecting rod 11 has a hinge part 11c protruding to the side part, and the hinge part 11c is hingedly connected in the valve body 1 through a pin shaft.

[0053] The hinge part 11c can stably hinge the connecting rod 11 in the valve body 1.

[0054] The pressure reducing valve can control the opening and closing degree of the sealing assembly through the pressure adjusting assembly, so as to achieve the purpose of pressure control. The pressure adjusting operation only needs to operate the pressure adjusting assembly, which is simple and convenient.

[0055] Meanwhile, the pressure adjusting assembly and the sealing assembly are connected through a mechanical connecting rod mechanism, which has high transmission stability and effectively improves the stability of the whole pressure reducing valve.

[0056] In addition, the pressure adjusting assembly and the sealing assembly are located in the valve body, so that the whole pressure reducing valve has a compact structure and has high practical value.

[0057] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0058] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application. Any appropriate changes and variations of the above embodiments within the spirit and scope of the present application are within the scope of the present application.

Claims

1. A pressure reducing valve comprising a valve body (1) having a hollow interior, the valve body (1) having an inlet pipe (2) and an outlet pipe (3) at left and right ends thereof, respectively, which communicate with the interior thereof, characterized in that, It also comprises a valve stem (12), a sealing assembly and a pressure regulating assembly, the valve body (1) has a partition (4) inside and the partition (4) divides the valve body (1) into two cavities adjacent to each other: cavity one and cavity two located at the lower part of cavity one, the above-mentioned valve stem (12) is arranged in the middle of the partition (4), the above-mentioned pressure regulating assembly is located at cavity one and is connected with the upper part of the valve stem (12), and the above-mentioned sealing assembly is located at cavity two and is connected with the lower part of the valve stem (12).

2. The pressure reducing valve according to claim 1, characterized by The pressure regulating assembly comprises an adjusting cylinder (5), an adjusting block (6), a stop disc (7) and a spring (8), the above-mentioned adjusting cylinder (5) is located at the upper part of the valve body (1) and is communicated with cavity one, the above-mentioned adjusting block (6) is embedded in the adjusting cylinder (5) and is threadedly connected with the adjusting cylinder (5), the above-mentioned stop disc (7) is fixedly connected on the valve stem (12), and the above-mentioned spring (8) is sleeved on the valve stem (12), the two ends of the spring (8) are respectively arranged on the stop disc (7) and the partition (4), and the valve stem (12) has a tendency to move upward under the elastic force of the spring (8).

3. The pressure reducing valve according to claim 2, characterized by The sealing assembly comprises a sealing cylinder (9) and a sealing block (10), the above-mentioned sealing cylinder (9) and the sealing block (10) are both located in the inlet pipe (2), the above-mentioned sealing cylinder (9) is fixedly connected with the inlet pipe (2), and the above-mentioned sealing block (10) is movably connected with the lower end of the valve stem (12).

4. The pressure reducing valve according to claim 3, characterized by The sealing block (10) has a water passing gap between the side part and the inlet pipe (2).

5. The pressure reducing valve according to claim 4, wherein The inlet pipe (2) comprises a pipe body one (2a) and a pipe body two (2b), the above-mentioned pipe body one (2a) is located at the side part of the valve body (1), the above-mentioned pipe body two (2b) is threadedly connected with the pipe body one (2a), and the above-mentioned sealing cylinder (9) is tightly pressed between the pipe body one (2a) and the pipe body two (2b).

6. The pressure reducing valve according to claim 5, wherein The middle part of the adjusting block (6) has an avoiding hole (6a), and the upper end of the valve stem (12) is arranged at the avoiding hole (6a).

7. The pressure reducing valve according to claim 6, wherein It also comprises a connecting rod (11), the middle part of the connecting rod (11) is hingedly connected in the valve body (1), the lower end of the valve stem (12) has a pulling hole one (12a), the sealing block (10) has a pulling hole two (10a) on it, the two ends of the connecting rod (11) are respectively a buckling segment one (11a) and a buckling segment two (11b), the buckling segment one (11a) is movably connected at the pulling hole one (12a), and the buckling segment two (11b) is movably connected at the pulling hole two (10a).

8. The pressure reducing valve according to claim 7, characterized by The buckling segment one (11a) is in the shape of a long rod and is arranged perpendicularly to the connecting rod (11).

9. The pressure reducing valve according to claim 8, characterized by The buckling segment two (11b) is in the shape of a hook and is embedded in the pulling hole two (10a).

10. The pressure reducing valve according to claim 9, wherein The middle part of the connecting rod (11) has a hinged part (11c) protruding to the side part thereof, and the hinged part (11c) is hingedly connected in the valve body (1) through a pin shaft.

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