Valve capable of automatically shutting off after pressure balance by manually opening flow path

Abstract

The utility model discloses a valve capable of automatically shutting off after pressure balance after a flow path is manually opened, and relates to the technical field of balance valves. The check valve comprises a valve body, wherein a mounting mechanism, an adjusting mechanism, a connecting mechanism, a flow blocking mechanism and a switching mechanism are arranged on the valve body; the mounting mechanism comprises a groove formed in the valve body, a first threaded groove is formed in the inner wall of the groove, a threaded sealing sleeve is in threaded connection with the inner wall of the first threaded groove, a rotating rod is slidably connected with the inner wall of the threaded sealing sleeve, and the diameter of the rotating rod is the same as that of the inner ring of the threaded sealing sleeve. A sealing sleeve is connected to the inner wall of the threaded sleeve in a sliding mode, a sliding groove is formed in the sealing sleeve, and the caliber of the sliding groove is the same as that of the inner ring of the adjusting rotating rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of balancing valves, in particular to a valve which can be automatically shut off after a flow path is manually opened and pressure is balanced. Background Art

[0002] The balancing valve is a valve with special functions. The valve itself is not special, but the difference lies in the function and place of use. In some industries, due to the large pressure difference between the medium (various flowable substances) in various parts of the pipeline or container, the main valve cannot be opened due to the high differential pressure. In order to reduce or balance the difference, a valve is installed between the corresponding pipelines or containers to adjust the relative balance of pressure on both sides, and to achieve pressure balance by diversion. This valve is called a balancing valve. Utility Model Content

[0003] The purpose of the utility model is to provide a valve that can automatically shut off after the pressure is balanced after the flow path is manually opened. The utility model is achieved through the following technical solutions:

[0004] The utility model is a valve that can automatically shut off after the pressure is balanced after the flow path is manually opened, comprising a valve body, on which a mounting mechanism, an adjusting mechanism, a connecting mechanism, a flow blocking mechanism, a switch mechanism and a valve core cavity that together form a larger continuous cavity are arranged;

[0005] The mounting mechanism comprises a groove formed on the valve body, the inner wall of the groove is provided with a first thread groove, the inner wall of the first thread groove is threadedly connected with a threaded sealing sleeve, and the inner wall of the threaded sealing sleeve is provided with a second thread groove;

[0006] The switch mechanism includes a sealing block fixedly connected to the valve body, a valve core passing through the sealing block, a valve core locating pin being provided on the valve core, the valve core being slidably connected to the sealing block, the left end of the valve core extending to the interior of the valve core cavity, a valve core stopper 1 and a valve core stopper 2 being fixedly connected to the valve core, a sealing gasket being fixedly connected to the valve core stopper 1 and the valve core stopper 2, a number of the sealing gaskets being slidably connected to the inner wall of the valve core cavity, a reset spring being fixedly connected between the connecting block and the corresponding stopper, and an inlet being fixedly connected to the bottom surface of the valve body.

[0007] Furthermore, the adjustment mechanism includes a rotating rod passing through the threaded sealing sleeve, the rotating rod is slidably connected to the threaded sealing sleeve, and a second thread groove is provided on the rotating rod and the inner wall of the threaded sealing sleeve, the two second thread grooves are adapted to each other, and a cross groove is provided at the right end of the rotating rod for convenient screwdriver adjustment.

[0008] Further, the connecting mechanism includes a first connecting channel opened inside the valve body, a low-pressure chamber is opened inside the valve body, the first connecting channel is located between the groove and the low-pressure chamber, a second connecting channel is opened inside the valve body, a valve core chamber is opened inside the valve body, and the second connecting channel is located between the low-pressure chamber and the valve core chamber.

[0009] The utility model has the following beneficial effects:

[0010] 1. By providing an installation mechanism, the slide groove and the threaded sleeve cooperate with each other, so that the sealing sleeve can only rotate on the inner wall of the threaded sleeve to avoid dislocation. After the threaded sleeve is fixed, the rotating rod can be driven to move on the inner wall of the sealing sleeve by rotating the rotating rod, so that the tightness of the reset spring can be adjusted.

[0011] 2. By setting a switch mechanism, when the valve core is pushed to the left, the sealing gasket and the valve core stopper cooperate with each other to squeeze the medium in the left part of the valve core cavity, so that it flows into the right side of the valve core cavity through the first connecting channel and the second connecting channel, forming a backflow effect. In the process of pushing, the second valve core stopper loses its sealing effect on the third connecting channel, so that the second connecting channel and the third connecting channel are opened, and the high-pressure side medium first enters the low-pressure side through this channel, so that the thrust required for the operating handle is greatly reduced.

[0012] As the first valve core block is gradually pushed into the right valve core cavity, the entire main medium flow path is opened, and the medium pressures on both sides of high and low pressure transition smoothly, reducing the impact of the high-pressure side on the low-pressure side; by setting a reset spring, when the pressure inside the high-pressure chamber and the pressure inside the low-pressure chamber gradually become equal, the reset spring slowly resets and drives the valve core to move to the right. After the flow path pressure is balanced, it can achieve self-shutoff, that is, self-reset, thereby reducing work intensity or meeting some special needs.

[0013] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of a valve that can automatically shut off after the pressure is balanced after the flow path is manually opened in the utility model;

[0016] Figure 2.1This is a schematic cross-sectional structure diagram of a valve that can automatically shut off after the flow path is manually opened and the pressure is balanced (closed state) according to the utility model;

[0017] Figure 2.2 This is a schematic cross-sectional structure diagram of a valve that can automatically shut off after the flow path is manually opened and the pressure is balanced (open state) according to the utility model;

[0018] Figure 3 This is a structural schematic diagram of a switch mechanism of the utility model that can automatically shut off a valve after the flow path is manually opened and the pressure is balanced;

[0019] Figure 4 This is an enlarged structural schematic diagram of the valve at A in FIG2 of the utility model, which can automatically shut off the valve after the flow path is manually opened and the pressure is balanced;

[0020] Figure 5 This is an enlarged structural schematic diagram of the point B in FIG. 2 of the utility model, which is a valve that can automatically shut off after the flow path is manually opened and the pressure is balanced.

[0021] Figure 6 This is an enlarged structural schematic diagram of a valve that can automatically shut off after the pressure is balanced after manually opening the flow path of the utility model at C in FIG. 2 ;

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Valve body; 2. Installation mechanism; 3. Adjustment mechanism; 4. Connection mechanism; 5. Flow blocking mechanism; 6. Switch mechanism; 7. Reset spring; 8. Sealing block; 9. Inlet; 21. Groove; 22. First thread groove; 23. Threaded sealing sleeve; 31. Turn rod; 32. Second thread groove; 35. Connection block; 41. First connecting channel; 42. Low-pressure chamber; 43. Second connecting channel; 44. Valve core chamber (including 44.1 to 44.3); 51. High-pressure chamber; 52. Integrally molded valve seat; 53. Third connecting channel; 61. Valve core; 62. Valve core block 1 62.1; 62.2. Valve core block 2; 66.1. First valve core block; 66.2. Second valve core block; 63. Sealing gasket; 64. Valve core locating pin. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-6As shown, the utility model is a valve that can automatically shut off after the pressure is balanced after the flow path is manually opened, including a valve body 1, on which a mounting mechanism 2, an adjustment mechanism 3, a connection mechanism 4, a flow blocking mechanism 5, a switch mechanism 6 and a valve core cavity 44 which is a larger continuous cavity formed by valve core cavities 44.1 to 44.3 are arranged;

[0026] The mounting mechanism 2 comprises a groove 21 formed on the valve body 1, the inner wall of the groove 21 is provided with a first thread groove 22, the inner wall of the first thread groove 22 is threadedly connected with a threaded sealing sleeve 23, and the inner wall of the threaded sealing sleeve 23 is provided with a second thread groove 32;

[0027] The switch mechanism 6 includes a sealing block 8 fixedly connected to the valve body 1, a valve core 61 passes through the sealing block 8, the valve core 61 is provided with a valve core positioning pin 64, the valve core 61 is slidably connected to the sealing block 8, the left end of the valve core 61 extends to the interior of the valve core cavity 44, a valve core stopper 1 62.1 and a valve core stopper 2 61.2 are fixedly connected to the valve core 61, and a sealing gasket 63 is fixedly connected to the valve core stopper 1 62.1 and the valve core stopper 2 61.2, and several of the sealing gaskets 63 are slidably connected to the inner wall of the valve core cavity 44, a reset spring 7 is fixedly connected between the connecting block 35 and the corresponding stopper 62, and an inlet 9 is fixedly connected to the bottom surface of the valve body 1.

[0028] Among them Figure 2.1~2.2 and Figure 4 As shown, the adjustment mechanism 3 includes a rotating rod 31 that passes through the threaded sealing sleeve 23. The rotating rod 31 is slidably connected to the threaded sealing sleeve 23. A second thread groove 32 is provided on the rotating rod 31 and on the inner wall of the threaded sealing sleeve 23. The two second thread grooves 32 are adapted to each other. A cross groove is provided at the right end of the rotating rod 31 for convenient screwdriver adjustment.

[0029] By providing the adjustment mechanism 3, the two second thread grooves 32 cooperate with each other. After the threaded sealing sleeve 23 is manually fixed, the rotating rod 31 can be driven to move left and right on the inner wall of the threaded sealing sleeve 23 by rotating the rotating rod 31, so that the tightness of the reset spring 7 can be adjusted.

[0030] Among them Figure 2.1~2,2 As shown, the connecting mechanism 4 includes a first connecting channel 41 opened inside the valve body 1, a low-pressure chamber 42 is opened inside the valve body 1, the first connecting channel 41 is located between the groove 21 and the low-pressure chamber 42, a second connecting channel 43 is opened inside the valve body 1, a valve core chamber 44 is opened inside the valve body 1, and the second connecting channel 43 is located between the low-pressure chamber 42 and the valve core chamber 44.1.

[0031] By providing the connecting mechanism 4, when the medium flows into the low-pressure chamber 42, the medium flows to the left and right sides of the valve core chamber 44 through the first connecting channel 41 and the second connecting channel 43 respectively, and the low-pressure chamber 42 is located on the side away from the inlet 9 relative to the high-pressure chamber 51, so the internal medium of the low-pressure chamber 42 is in a low-pressure state.

[0032] As shown in Figure 2, the flow blocking mechanism 5 includes a high-pressure chamber 51 opened inside the valve body 1, and a third connecting channel 53 is opened inside the valve body 1. The third connecting channel 53 is located between the high-pressure chamber 51 and the valve core chambers 44.1 and 44.2 when the self-shutoff valve is in the closed state. The inner wall of the high-pressure chamber 51 and the inner wall of the low-pressure chamber 42 are transitioned by a valve seat C integrally formed with the valve body 1.

[0033] By providing the flow blocking mechanism 5 , the medium flows from the high-pressure chamber 51 into the low-pressure chamber 42 through the integrally formed valve seat C.

[0034] By providing a switch mechanism 6, when the valve core 61 is pushed to the left, the sealing gasket 63 and the stopper 62 cooperate with each other to squeeze the medium in the left part of the valve core chamber 44, so that it flows into the right side of the valve core chamber 44 through the first connecting channel 41 and the second connecting channel 43, and the high-pressure chamber 51 and the low-pressure chamber 43 are connected through the third connecting channel 53, thereby eliminating the differential pressure between the high-pressure chamber 51 and the low-pressure chamber 43, so that the valve core 61 is easier to open.

[0035] By providing a reset spring 7, when the internal pressure of the high-pressure chamber 51 and the internal pressure of the low-pressure chamber 42 gradually become equal, the reset spring 7 slowly resets, driving the valve core 61 to move to the right. The valve can close itself after the flow path pressure is balanced, that is, the self-resetting valve, thereby reducing the work intensity or meeting certain special needs.

[0036] A specific application of this embodiment is as follows: by providing an installation mechanism 2, before the button on the left side of the valve core 61 is installed, the valve core is installed through this position; by providing an adjustment mechanism 3, the two second thread grooves 32 cooperate with each other, and after fixing the threaded sleeve 23, the rotating rod 31 can be driven to move left and right on the inner wall of the threaded sealing sleeve 23 by rotating the rotating rod 31, so that the tightness of the reset spring 7 can be adjusted; by providing a connecting mechanism 4, when the medium flows into the low-pressure chamber 42, the medium flows to the left and right sides of the valve core chamber 44 through the first connecting channel 41 and the second connecting channel 43 respectively, and the low-pressure chamber 42 is on the side away from the inlet 9 relative to the high-pressure chamber 51, so the internal medium of the low-pressure chamber 42 is in a low-pressure state; by providing a flow blocking mechanism 5, the medium The medium flows from the high-pressure chamber 51 to the low-pressure chamber 42 through the integrally formed valve seat C; by providing a switch mechanism 6, when the valve core 61 is pushed to the left, the sealing gasket 63 cooperates with the valve core block 62 to squeeze the medium in the left part of the valve core chamber 44, so that it flows into the right side of the valve core chamber 44 through the first connecting channel 41 and the second connecting channel 43, and forms a passage with the interior of the high-pressure chamber 51 through the third connecting channel 53, thereby greatly reducing the differential pressure between the interior of the high-pressure chamber 51 and the interior of the low-pressure chamber 42; by providing a reset spring 7, when the pressure inside the high-pressure chamber 51 and the pressure inside the low-pressure chamber 42 gradually become equal, the reset spring 7 slowly resets, driving the valve core 61 to move to the right, so that it can be self-closed after the flow path pressure is balanced, that is, self-reset, thereby reducing the work intensity or achieving some special needs.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A valve that can automatically shut off after the pressure is balanced after a manually opened flow path is opened, comprising a valve body (1), characterized in that: The valve body (1) is provided with a mounting mechanism (2), an adjusting mechanism (3), a connecting mechanism (4), a flow blocking mechanism (5), a switch mechanism (6) and a valve core cavity (44) which is a larger continuous cavity formed by the valve core cavity (44.1-44.3); The mounting mechanism (2) comprises a groove (21) formed on the valve body (1), the inner wall of the groove (21) being provided with a first thread groove (22), the inner wall of the first thread groove (22) being threadedly connected to a threaded sealing sleeve (23), and the inner wall of the threaded sealing sleeve (23) being provided with a second thread groove (32); The switch mechanism (6) comprises a sealing block (8) fixedly connected to the valve body (1), a valve core (61) passing through the sealing block (8), the valve core (61) being provided with a valve core positioning pin (64), the valve core (61) being slidably connected to the sealing block (8), the left end of the valve core (61) extending to the interior of the valve core cavity (44), a valve core stopper block 1 (62.1) and a valve core stopper block 2 (61.2) being fixedly connected to the valve core (61), the valve core stopper block 1 (62.1) and the valve core stopper block 2 (61.2) being fixedly connected to a sealing gasket (63), a plurality of the sealing gaskets (63) being slidably connected to the inner wall of the valve core cavity (44), a return spring (7) being fixedly connected between the connecting block (35) and the corresponding stopper block (62), and an inlet (9) being fixedly connected to the bottom surface of the valve body (1).

2. A valve according to claim 1 that can automatically shut off after the pressure of the manually opened flow path is balanced, characterized in that: The adjusting mechanism (3) comprises a rotating rod (31) penetrating the threaded sealing sleeve (23), the rotating rod (31) being slidably connected to the threaded sealing sleeve (23), the rotating rod (31) and the inner wall of the threaded sealing sleeve (23) being provided with a second thread groove (32), the two second thread grooves (32) being matched with each other, and a cross groove for convenient screwdriver adjustment is provided at the right end of the rotating rod (31).

3. A valve according to claim 2 that can automatically shut off after the pressure of the manually opened flow path is balanced, characterized in that: The connecting mechanism (4) comprises a first connecting channel (41) opened inside the valve body (1), a low-pressure chamber (42) is opened inside the valve body (1), the first connecting channel (41) is located between the groove (21) and the low-pressure chamber (42), a second connecting channel (43) is opened inside the valve body (1), a valve core chamber (44) is opened inside the valve body (1), and the second connecting channel (43) is located between the low-pressure chamber (42) and the valve core chamber (44.1).

4. A valve according to claim 3 that can automatically shut off after the pressure of the manually opened flow path is balanced, characterized in that: The flow blocking mechanism (5) comprises a high-pressure chamber (51) provided inside the valve body (1); a third connecting channel (53) is provided inside the valve body (1); the third connecting channel (53) is located between the high-pressure chamber (51) and the valve core chamber (44.1, 44.2) when the self-shutoff valve is in a closed state; the inner wall of the high-pressure chamber (51) and the inner wall of the low-pressure chamber (42) are transitioned by a valve seat (C) integrally formed with the valve body (1).

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