Balanced valve core structure of corrugated pipe

Abstract

The utility model relates to the technical field of balance valve cores, and discloses a corrugated pipe balance valve core structure which comprises a valve core device and a pipeline cavity, the valve core device is installed inside the pipeline cavity, a water flow pipe is connected inside the pipeline cavity, the valve core device is connected with the water flow pipe in a sliding mode, and the valve core device comprises a main valve core and a pilot valve core. A cavity is formed in the main valve element, the pilot valve element is arranged in the cavity, the cavity is communicated with the water flow pipe, when the valve is closed, the main valve element and the pilot valve element are both in a closed state, and fluid above the valve body is blocked and cannot flow out to the position below the valve body; the pilot valve element is separated from the pilot valve seat firstly under the combined action of force of a manually-driven corrugated pipe rod and a supporting spring, at the moment, fluid pressure above the valve element is released, pressure above and below the valve element is balanced, force needing to open the valve element is greatly reduced, the valve element is opened under the manually-driven corrugated pipe rod, and fluid can pass through the valve element from the position above the valve; and the water flows below the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of balanced valve cores, in particular to a bellows balanced valve core structure. Background Art

[0002] The bellows balanced valve core structure includes bellows, valve core, valve seat and valve stem. The bellows is the key component of the structure, and its elastic characteristics can achieve fluid pressure control and balance. The valve core is connected to the bellows through the valve stem to control the flow of the fluid. The valve seat plays the role of sealing the valve to ensure that the fluid does not leak. When the valve is operated, the bellows will expand and contract according to the change of medium pressure, thereby adjusting the degree of opening of the valve and realizing precise control of the flow. The bellows balanced valve core structure is exquisitely designed, which can adapt to the needs of different media and working conditions, and provide stable and reliable fluid control performance. This valve core structure is often used in industrial systems, such as water supply, gas supply, heating supply and other fields, with good energy-saving and environmental protection effects, providing good guarantee for system operation.

[0003] At present, when operating the valve core, when the valve core is subjected to excessive pressure, the valve may not be able to operate normally, or the valve core may be stuck due to excessive force, and the valve cannot be opened or closed normally; therefore, it does not meet the existing needs. We have proposed a bellows balanced valve core structure. Utility Model Content

[0004] The utility model provides a bellows balanced valve core structure, which has the beneficial effect of reducing pressure and solves the problem mentioned in the above background technology that when the valve core is operated, when the valve core is subjected to excessive pressure, the valve may not be able to operate normally, the valve core may be subjected to excessive force and become stuck, and the valve cannot be opened or closed normally.

[0005] The utility model provides the following technical solution: a bellows balanced valve core structure, comprising a valve core device and a pipeline cavity, wherein the valve core device is installed inside the pipeline cavity, a water flow pipe is connected inside the pipeline cavity, the valve core device is slidably connected to the water flow pipe, the valve core device comprises a main valve core and a pilot valve core, a cavity is opened inside the main valve core, the pilot valve core is arranged inside the cavity, and the cavity is connected to the water flow pipe.

[0006] As an optional scheme of a bellows balanced valve core structure described in the utility model, wherein: a water inlet is opened on one side of the pipe cavity, a water outlet is opened on the other side of the pipe cavity, the water inlet is connected to the water flow pipe, and the water flow pipe is connected to the water outlet.

[0007] As an optional scheme of a bellows balancing valve core structure described in the utility model, wherein: the pilot base is threadedly connected to the bottom of the cavity, a flow channel is opened on the side of the pilot base, a clamping groove is opened in the middle of the pilot base, a through hole is opened on the side of the clamping groove, and the through hole is connected to the flow channel.

[0008] As an optional scheme of a bellows balanced valve core structure described in the utility model, wherein: the pilot valve core is correspondingly arranged above the pilot base, a support spring is connected between the pilot base and the pilot valve core, a locking block is connected to the bottom of the pilot valve core, and the locking block is slidably matched with the locking groove.

[0009] As an optional scheme of a bellows balanced valve core structure described in the utility model, wherein: the end of the pilot valve core is connected to a pressure cover, a flow cavity is opened on the side of the pressure cover, a thread groove is arranged in the middle of the pressure cover, a connecting screw ring is threadedly connected inside the thread groove, and the inner wall and outer wall of the connecting ring are both arranged as threaded surfaces.

[0010] As an optional scheme of a bellows balanced valve core structure described in the utility model, wherein: the end of the pilot valve core is connected to a threaded column, and the threaded column is divided into a first threaded column and a second threaded column, the first threaded column is connected to the surface of the pilot valve core, and the second threaded column is integrally arranged at the end of the first threaded column.

[0011] As an optional scheme of a bellows balanced valve core structure described in the utility model, wherein: a bellows rod is inserted into the end of the pressure cover, the bellows rod is inserted into the interior of the main valve core, and the bellows rod is threadedly connected to the end of the second threaded column, and the first threaded column is connected to the inner wall of the connecting ring.

[0012] As an optional scheme of the bellows balanced valve core structure described in the utility model, wherein: a support ring is sleeved on the outer side of the main valve core, and a guide ring is sleeved on the outer side of the support ring.

[0013] The utility model has the following beneficial effects:

[0014] 1. The bellows balanced valve core structure, through the setting of the pilot valve core, when the valve is closed, the main valve core and the pilot valve core are both in a closed state, which blocks the fluid above the valve body, so that it cannot flow out to the bottom of the valve body, and the fluid pressure above the valve body presses the main valve core and the pilot valve core to the valve seat, which is more conducive to sealing and can achieve a higher sealing level. When the valve is opened, the pilot valve core is first separated from the pilot valve seat by the combined force of the manually driven bellows rod and the supporting spring. At this time, the fluid pressure above the valve core is released, and the pressure above and below the valve core is balanced. At this time, the force required to open the valve core is greatly reduced. The valve core is opened under the manually driven bellows rod, so that the fluid can pass through the valve core from the top of the valve and flow into the bottom of the valve body, solving the problem that when the valve core is subjected to excessive pressure during operation, the valve may not be able to operate normally, and the valve core may be stuck due to excessive force, and the valve cannot be opened or closed normally.

[0015] 2. The bellows balanced valve core structure adopts the setting of threaded cylinder. The threaded cylinder, connecting ring and pilot valve core are matched with multi-stage threaded connection. The design of multi-stage threaded connection can make the connecting parts fit more tightly, reduce looseness and clearance, and ensure the tightness between the connecting parts. At the same time, since all parts of the valve core are made of metal materials, it can work at high temperature, solving the problem of high temperature and high sealing level requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the opening structure of the valve core device of the utility model.

[0017] Figure 2 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0018] Figure 3 It is a schematic diagram of the closed structure of the valve core device of the utility model.

[0019] Figure 4 This is a schematic diagram of the threaded cylinder structure of the utility model.

[0020] In the figure: 110, valve core device; 111, main valve core; 112, pilot valve core; 113, cavity; 114, flow channel; 115, through hole; 116, pilot base; 120, snap-fit ​​groove; 121, snap-fit ​​block; 122, pressure cover; 123, flow cavity; 124, threaded groove; 125, connecting ring; 130, threaded column; 131, first threaded column; 132, second threaded column; 133, bellows rod; 134, support ring; 135, guide ring; 160, pipeline cavity; 161, water flow tube; 162, water inlet; 163, water outlet; 164, support spring. DETAILED DESCRIPTION

[0021] 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 in 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.

[0022] Embodiment 1: This embodiment is intended to help solve the problem that when the valve core is subjected to excessive pressure, the valve may not be able to operate normally, the valve core may be stuck due to excessive force, and the valve cannot be opened or closed normally. Please refer to Figure 1-4 A bellows balanced valve core structure includes a valve core device 110 and a pipeline cavity 160. The valve core device 110 is installed inside the pipeline cavity 160. A water flow tube 161 is connected to the inside of the pipeline cavity 160. The valve core device 110 is slidably connected to the water flow tube 161. The valve core device 110 includes a main valve core 111 and a pilot valve core 112. A cavity 113 is opened inside the main valve core 111. The pilot valve core 112 is arranged inside the cavity 113. The cavity 113 is connected to the water flow tube 161.

[0023] A water inlet 162 is provided on one side of the pipe cavity 160, and a water outlet 163 is provided on the other side of the pipe cavity 160. The water inlet 162 is connected to the water flow pipe 161, and the water flow pipe 161 is connected to the water outlet 163. The pilot base 116 is threadedly connected to the bottom of the cavity 113. A flow channel 114 is provided on the side of the pilot base 116. A through hole 115 is provided on the side of the locking groove 120. The through hole 115 is connected to the flow channel 114. Water flows from the flow cavity 123 to the cavity 113, and flows to the water outlet 163 from each structural gap.

[0024] The pilot valve core 112 is correspondingly arranged above the pilot base 116, and a locking groove 120 is opened in the middle of the pilot base 116. A locking block 121 is connected to the bottom of the pilot valve core 112, and the locking block 121 is slidably matched with the locking groove 120. A pressure cover 122 is connected to the end of the pilot valve core 112, and a flow cavity 123 is opened on the side of the pressure cover 122. A threaded groove 124 is set in the middle of the pressure cover 122, and a connecting screw ring is connected to the internal thread of the threaded groove 124. The inner wall and outer wall of the connecting ring 125 are set as threaded surfaces. A support ring 134 is sleeved on the outside of the main valve core 111, and a guide ring 135 is sleeved on the outside of the support ring 134.

[0025] In this embodiment: through the setting of the pilot valve core 112, when the valve is closed, the main valve core 111 and the pilot valve core 112 are both in a closed state, which blocks the fluid above the valve body, so that it cannot flow out to the bottom of the valve body, and the fluid pressure above the valve body presses the main valve core 111 and the pilot valve core 112 toward the valve seat, which is more conducive to sealing and can achieve a higher sealing level. When the valve is opened, the pilot valve core 112 is first separated from the pilot valve seat by the combined force of the manually driven bellows rod 133 and the support spring 164. At this time, the fluid pressure above the valve core is released, and the pressure above and below the valve core is balanced. At this time, the force required to open the valve core is greatly reduced. The valve core is opened under the manually driven bellows rod 133, so that the fluid can pass through the valve core from the top of the valve and flow into the bottom of the valve body, solving the problem that when the valve core is operated, when the valve core is subjected to excessive pressure, the valve may not be able to operate normally, and the valve core may be stuck due to excessive force, and the valve cannot be opened or closed normally.

[0026] Embodiment 2: This embodiment is intended to promote the solution of the problem of no reliable balanced valve core structure under high temperature and high sealing level conditions. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-4 A threaded cylinder 130 is connected to the end of the pilot valve core 112, and the threaded cylinder 130 is divided into a first threaded cylinder 131 and a second threaded cylinder 132. The first threaded cylinder 131 is connected to the surface of the pilot valve core 112, and the second threaded cylinder 132 is integrally arranged at the end of the first threaded cylinder 131. A bellows rod 133 is inserted into the end of the pressure cover 122, and the bellows rod 133 is inserted into the interior of the main valve core 111, and the bellows rod 133 is threadedly connected to the end of the second threaded cylinder 132, and the first threaded cylinder 131 is connected to the inner wall of the connecting ring 125.

[0027] In this embodiment: through the setting of the threaded cylinder 130, the threaded cylinder 130, the connecting ring 125 and the pilot valve core 112 are matched, and a multi-stage threaded connection is formed. The design of the multi-stage threaded connection can make the connecting parts fit more tightly, reduce looseness and clearance, and ensure the tightness between the connecting parts. At the same time, since all the components of the valve core are made of metal materials, it can work at high temperatures, solving the problem of high temperature and high sealing level requirements.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A bellows balanced valve core structure, comprising a valve core device (110) and a pipeline cavity (160), wherein the valve core device (110) is installed inside the pipeline cavity (160), characterized in that: The pipeline cavity (160) is connected to a water flow tube (161), the valve core device (110) is slidably connected to the water flow tube (161), the valve core device (110) comprises a main valve core (111) and a pilot valve core (112), a cavity (113) is provided inside the main valve core (111), the pilot valve core (112) is arranged inside the cavity (113), and the cavity (113) is connected to the water flow tube (161); The pilot base (116) is threadedly connected to the bottom of the cavity (113); a flow channel (114) is provided on the side of the pilot base (116); a clamping groove (120) is provided in the middle of the pilot base (116); a through hole (115) is provided on the side of the clamping groove (120); and the through hole (115) is connected to the flow channel (114); The pilot valve core (112) is correspondingly arranged above the pilot base (116); a support spring (164) is connected between the pilot base (116) and the pilot valve core (112); a clamping block (121) is connected to the bottom of the pilot valve core (112); and the clamping block (121) is slidably matched with the clamping groove (120); The end of the pilot valve core (112) is connected to a pressure cover (122), a flow cavity (123) is opened on the side of the pressure cover (122), a thread groove (124) is arranged in the middle of the pressure cover (122), a connecting ring (125) is connected to the inner thread of the thread groove (124), and the inner wall and the outer wall of the connecting ring (125) are both arranged as threaded surfaces.

2. A bellows balanced valve core structure according to claim 1, characterized in that: A water inlet (162) is provided on one side of the pipe cavity (160), and a water outlet (163) is provided on the other side of the pipe cavity (160); the water inlet (162) is connected to the water flow pipe (161), and the water flow pipe (161) is connected to the water outlet (163).

3. A bellows balanced valve core structure according to claim 2, characterized in that: A threaded column (130) is connected to the end of the pilot valve core (112), and the threaded column (130) is divided into a first threaded column (131) and a second threaded column (132). The first threaded column (131) is connected to the surface of the pilot valve core (112), and the second threaded column (132) is integrally arranged at the end of the first threaded column (131).

4. A bellows balanced valve core structure according to claim 3, characterized in that: A bellows rod (133) is inserted into the end of the pressure cover (122), and the bellows rod (133) is inserted into the interior of the main valve core (111). The bellows rod (133) is threadedly connected to the end of the second threaded column (132), and the first threaded column (131) is connected to the inner wall of the connecting ring (125).

5. The bellows balanced valve core structure according to claim 1, characterized in that: A support ring (134) is sleeved on the outer side of the main valve core (111), and a guide ring (135) is sleeved on the outer side of the support ring (134).

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