Pressure equalizing mechanism and regulating valve

Abstract

The invention relates to the field of regulating valves, and discloses a pressure equalizing mechanism and a regulating valve, the pressure equalizing mechanism comprises a control part, the control part comprises a sliding assembly, an auxiliary assembly arranged on the outer side of the sliding assembly, and a driving assembly and a balancing part which are arranged on the outer side of the sliding assembly; the balance component comprises a water injection assembly arranged in the sliding assembly, a sealing assembly installed on the outer side of the sliding assembly and an isobaric assembly arranged in the water injection assembly. By arranging the balance component to be matched with the guide assembly, the water pressure of the bottom and the side face of the plunger can be equal to the water pressure of the water inlet position in the process of supplementing water from the high-temperature and high-pressure first-stage net to the second-stage net, so that inflow water flow cannot impact the plunger, the plunger cannot deflect, and when water supplementing is finished, the plunger cannot deflect. The water pressure of the bottom and the side face of the plunger is equal to the water pressure of the water outlet position, an isobaric area is formed as well, the plunger cannot deflect, and therefore the situation of water leakage caused by eccentric wear of the plunger and the guide wall is prevented.

Description

Technical Field

[0001] The present invention relates to the field of regulating valves, and in particular to a pressure equalizing mechanism and a regulating valve. Background Art

[0002] In the heat exchange station, when the high-temperature and high-pressure primary network replenishes water to the secondary network, the water flows into the regulating valve through the water inlet and impacts the plunger inside the regulating valve, causing the plunger to deflect. The deflected force-bearing plunger and the guide cavity will cause eccentric wear when sliding up and down, resulting in water leakage and internal leakage. In addition, the deflected plunger will also cause eccentric wear on the sealing ring when sliding, thereby shortening the service life of the sealing ring. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is: how to prevent the plunger from deflecting.

[0004] The above technical problem is solved by the following technical solution: The present invention proposes a pressure equalizing mechanism, which includes:

[0005] A control component, the control component comprising a sliding component, an auxiliary component arranged outside the sliding component, and a driving component installed outside the sliding component;

[0006] The balancing component includes a water injection component arranged inside the sliding component, a sealing component installed outside the sliding component, and an isobaric component arranged inside the water injection component.

[0007] In a preferred embodiment of the pressure equalizing mechanism of the present invention: the sliding assembly includes a plunger and an inclined surface provided on the outer side of the plunger.

[0008] In a preferred embodiment of the pressure equalizing mechanism of the present invention: the auxiliary component includes a water injection ring arranged on the outside of the inclined surface, and a curved surface opened on the outside of the water injection ring.

[0009] In a preferred embodiment of the pressure equalizing mechanism of the present invention: the driving assembly includes a pull rod fixedly connected to the outside of the plunger, and a guide block sleeved on the outside of the pull rod.

[0010] In a preferred embodiment of the pressure equalizing mechanism of the present invention: the water injection assembly includes a side groove opened inside the plunger, and a central groove opened inside the plunger;

[0011] Wherein, the side groove is communicated with the central groove.

[0012] In a preferred embodiment of the pressure equalizing mechanism of the present invention: the sealing assembly includes a first sealing ring installed on the outside of the plunger, and a second sealing ring installed on the outside of the plunger.

[0013] In a preferred embodiment of the pressure equalizing mechanism of the present invention: the pressure equalizing component includes a pressure equalizing groove opened inside the plunger, and a pressure equalizing guide hole opened inside the plunger;

[0014] Wherein, the pressure equalizing guide hole is communicated with the central groove.

[0015] The present invention also provides a regulating valve.

[0016] In a preferred embodiment of the regulating valve of the present invention: a regulating valve comprises the pressure equalizing mechanism, and further comprises:

[0017] The integral component comprises a main body component arranged outside the control component, and a guide component arranged inside the main body component.

[0018] In a preferred embodiment of the regulating valve of the present invention: the main body assembly includes a valve body arranged outside the plunger, a water inlet flange installed outside the valve body, and a water outlet flange installed outside the valve body, and a base fixedly connected to the bottom end of the valve body;

[0019] Wherein, the water injection ring is fixedly connected to the inside of the valve body, and the guide block is fixedly connected to the inside of the valve body.

[0020] In a preferred embodiment of the regulating valve of the present invention: the guide assembly includes a guide wall fixedly connected to the inside of the valve body, and a guide cavity arranged inside the guide wall.

[0021] The beneficial effect of the present invention is that by arranging a balancing component to cooperate with the guide component, it can be achieved that during the process of water replenishment from the high-temperature and high-pressure primary network to the secondary network, the water pressure at the bottom and sides of the plunger is equal to the water pressure at the water inlet position, so that the incoming water flow will not impact the plunger and the plunger will not deflect. At the end of water replenishment, the water pressure at the bottom and sides of the plunger is equal to the water pressure at the water outlet position, and an isobaric zone is also formed, so that the plunger will not deflect, thereby preventing the plunger from eccentric wear with the guide wall and causing water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention. Among them:

[0023] Figure 1 An overall diagram of the present invention is shown;

[0024] Figure 2 A diagram of a sliding assembly of the present invention is shown;

[0025] Figure 3 An overall cross-sectional view of the present invention is shown. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation methods and drawings.

[0027] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present invention.

[0028] Reference Figure 1 to Figure 3 , this embodiment provides a pressure equalizing mechanism, including,

[0029] A control component 1, the control component 1 comprises a sliding component 11, an auxiliary component 12 arranged outside the sliding component 11, and a driving component 13 installed outside the sliding component 11;

[0030] The balancing component 2 includes a water injection component 21 arranged inside the sliding component 11 , a sealing component 22 installed outside the sliding component 11 , and an isobaric component 23 arranged inside the water injection component 21 .

[0031] The sliding assembly 11 includes a plunger 111 and an inclined surface 112 formed on the outer side of the plunger 111 .

[0032] The auxiliary component 12 includes a water injection ring 121 disposed outside the inclined surface 112 , and a curved surface 122 opened outside the water injection ring 121 .

[0033] The driving assembly 13 includes a pull rod 131 fixedly connected to the outside of the plunger 111 , and a guide block 132 sleeved on the outside of the pull rod 131 .

[0034] A regulating valve, characterized in that: it includes a pressure equalizing mechanism, and also includes:

[0035] The integral component 3 includes a main body component 31 arranged outside the control component 1 and a guide component 32 arranged inside the main body component 31 .

[0036] The main assembly 31 includes a valve body 311 disposed outside the plunger 111, a water inlet flange 312 installed outside the valve body 311, and a water outlet flange 313 installed outside the valve body 311, and a base 314 fixedly connected to the bottom end of the valve body 311;

[0037] The water injection ring 121 is fixedly connected to the inside of the valve body 311 , and the guide block 132 is fixedly connected to the inside of the valve body 311 .

[0038] The guide assembly 32 includes a guide wall 321 fixedly connected to the inside of the valve body 311 , and a guide cavity 322 disposed inside the guide wall 321 .

[0039] The inclined surface 112 is made of rubber material.

[0040] An electric push rod is disposed at the top of the pull rod 131 .

[0041] The water pressure in the water inlet pipe connected to the water inlet flange 312 is a Pa, and the water pressure in the water outlet pipe connected to the water outlet flange 313 is b Pa, wherein a Pa>b Pa.

[0042] When replenishing water, the electric push rod pushes the pull rod 131 to drive the plunger 111 to move downward. At this time, the inclined surface 112 is separated from the outer arc surface 122 of the water injection circle 121. Since the water pressure at the water inlet flange 312 is greater than the water pressure at the water outlet flange 313, the water flows from the water inlet flange 312 to the water outlet flange 313 to achieve water replenishment.

[0043] The arc surface 122 is arranged on the outer side of the water injection ring 121 to reduce the damage of the water injection ring 121 to the inclined surface 112 made of rubber material.

[0044] After the water replenishment is completed, the electric push rod drives the plunger 111 to move upward through the pull rod 131. At this time, the inclined surface 112 is in contact with the outer arc surface 122 of the water injection ring 121, and the water replenishment is completed.

[0045] Reference Figure 1 to Figure 3 , this embodiment provides a water injection assembly 21 including a side groove 211 opened inside the plunger 111, and a central groove 212 opened inside the plunger 111;

[0046] The side groove 211 is connected to the central groove 212 .

[0047] The sealing assembly 22 includes a first sealing ring 221 installed on the outside of the plunger 111 , and a second sealing ring 222 installed on the outside of the plunger 111 .

[0048] The equal pressure assembly 23 includes a pressure equalizing groove 231 opened inside the plunger 111, and a pressure equalizing guide hole 232 opened inside the plunger 111;

[0049] The pressure equalizing hole 232 is connected to the central groove 212 .

[0050] Typically, during the water replenishment process, when a Pa of water flows from the water inlet flange 312 to the water outlet flange 313, the water flow will impact the plunger 111, causing the plunger 111 to deflect, thereby causing eccentric wear between the plunger 111 and the guide wall 321, while damaging the first sealing ring 221 and the second sealing ring 222.

[0051] In the present invention, during the water replenishment process, while the water flow of aPa flows from the water inlet flange 312 to the water outlet flange 313, it also enters the center groove 212 through the side groove 211, and then flows from the center groove 212 to the guide cavity 322, and also enters the pressure equalizing groove 231 through the pressure equalizing guide hole 232.

[0052] At this time, the pressure of the water flow on the top of the plunger 111, the water flow inside the pressure equalizing groove 231 and the water flow inside the guide cavity 322 is equal to c Pa, where b Pa < c Pa < a Pa.

[0053] In addition, when a water flow of c Pa flows into the water outlet pipe, the water outlet flange 313 is impacted by the water flow of c Pa, and the water pressure will slightly increase to d Pa, wherein b Pa < d Pa < c Pa < a Pa.

[0054] Since the pressures of the water flow on the top of the plunger 111, the water flow inside the pressure equalizing groove 231 and the water flow inside the guide cavity 322 are equal, a pressure equalization condition is achieved, so the water flow at the water inlet position will not impact the plunger 111, that is, the plunger 111 will not deflect.

[0055] As an embodiment provided in this application, Figure 1 to Figure 3 After the water replenishment is completed, the electric push rod drives the plunger 111 to move up to the inclined surface 112 through the pull rod 131 and is about to contact the arc surface 122. The water flow at the water outlet flange 313 position dPa will pass through the side groove 211 and the center groove 212, and enter the pressure equalizing groove 231 and the guide cavity 322, so that the pressure of the water flow at the water outlet flange 313 position, the water flow inside the pressure equalizing groove 231 and the water flow inside the guide cavity 322 are equal, and the pressure equalization is achieved. Therefore, the water flow at the water outlet flange 313 position will not impact the plunger 111, that is, the plunger 111 will not deflect.

[0056] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A pressure equalizing mechanism, characterized in that: include, A control component (1), the control component (1) comprising a sliding component (11), an auxiliary component (12) arranged outside the sliding component (11), and a driving component (13) installed outside the sliding component (11); A balancing component (2), the balancing component (2) comprising a water injection component (21) arranged inside the sliding component (11), a sealing component (22) installed outside the sliding component (11), and an isobaric component (23) arranged inside the water injection component (21).

2. The pressure equalizing mechanism according to claim 1, characterized in that: The sliding assembly (11) comprises a plunger (111) and an inclined surface (112) disposed on the outside of the plunger (111).

3. The pressure equalizing mechanism according to claim 2, characterized in that: The auxiliary component (12) comprises a water injection ring (121) arranged outside the inclined surface (112), and a curved surface (122) opened outside the water injection ring (121).

4. The pressure equalizing mechanism according to claim 3, characterized in that: The driving assembly (13) comprises a pull rod (131) fixedly connected to the outside of the plunger (111), and a guide block (132) sleeved on the outside of the pull rod (131).

5. The pressure equalizing mechanism according to claim 4, characterized in that: The water injection assembly (21) comprises a side groove (211) provided inside the plunger (111), and a central groove (212) provided inside the plunger (111); Wherein, the side groove (211) is communicated with the central groove (212).

6. The pressure equalizing mechanism according to claim 5, characterized in that: The sealing assembly (22) comprises a first sealing ring (221) installed on the outside of the plunger (111), and a second sealing ring (222) installed on the outside of the plunger (111).

7. The pressure equalizing mechanism according to claim 6, characterized in that: The equalizing component (23) comprises a equalizing groove (231) provided inside the plunger (111), and a equalizing guide hole (232) provided inside the plunger (111); Wherein, the pressure-equalizing guide hole (232) is in communication with the central groove (212).

8. A regulating valve, characterized in that: The device comprises the pressure equalizing mechanism according to any one of claims 4 to 7, and further comprises: An integral component (3), the integral component (3) comprising a main body component (31) arranged outside the control component (1), and a guide component (32) arranged inside the main body component (31).

9. The regulating valve according to claim 8, characterized in that: The main body assembly (31) comprises a valve body (311) arranged outside the plunger (111), a water inlet flange (312) installed outside the valve body (311), and a water outlet flange (313) installed outside the valve body (311), and a base (314) fixedly connected to the bottom end of the valve body (311); The water injection ring (121) is fixedly connected to the inside of the valve body (311), and the guide block (132) is fixedly connected to the inside of the valve body (311).

10. The regulating valve according to claim 9, characterized in that: The guide assembly (32) comprises a guide wall (321) fixedly connected to the interior of the valve body (311), and a guide cavity (322) arranged inside the guide wall (321).

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