Thermostatic expansion valve with replaceable valve element

Abstract

The utility model discloses a thermostatic expansion valve with a replaceable valve element, and relates to the technical field of valves, the thermostatic expansion valve comprises a main body, the side wall of the upper half end of the main body is fixedly connected with an inflow pipe, and the main body is internally provided with a regulation and control element replacement mechanism. According to the thermostatic expansion valve with the replaceable valve element, a rotary knob can be rotated to drive a threaded rod to horizontally move, so that a clamping column and a sliding circular ring are released from a clamping state, then a connecting disc is rotated to drive a second rotating cylinder to rotate through a short rod, and the second rotating cylinder and the connecting cylinder synchronously rotate; when the valve element part needs to be replaced, the inflow pipe and the outflow pipe are synchronously sealed, so that accidental leakage of condensate can be prevented when the valve element part needs to be replaced, safety of operators is protected, refrigerants are prevented from making direct contact with the operators, and potential health risks are reduced.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a thermal expansion valve with a replaceable valve core. Background Art

[0002] A thermal expansion valve is a device that controls the refrigerant flow rate by changing the cross-sectional area of ​​the channel. It uses the change in the refrigerant superheat at the evaporator outlet to adjust the valve opening, thereby controlling the refrigerant flow rate entering the evaporator.

[0003] As shown in Chinese patent publication number CN104896811A, a replaceable valve core type thermal expansion valve and its assembly method still have the following shortcomings in actual use:

[0004] When the valve core of the thermal expansion valve with replaceable valve core of the above-mentioned patent is actually used, the valve core is replaced by plugging it in, but the inside of the valve is not sealed during the replacement process, so that when the valve core is replaced, the refrigerant may leak from the inlet or outlet, which will not only lead to waste of refrigerant, but also may pollute the environment and affect the normal operation of the refrigeration system. Utility Model Content

[0005] In order to improve the problem of insufficient sealing, the present application provides a thermal expansion valve with a replaceable valve core.

[0006] The present application provides a thermal expansion valve with a replaceable valve core, which adopts the following technical solution:

[0007] A thermal expansion valve with a replaceable valve core, comprising a main body, an inlet pipe is fixedly connected to the side wall of the upper half of the main body, an outlet pipe is fixedly connected to the side wall of the lower half of the main body, a driving box is fixedly connected to the top of the main body, a connecting end is fixedly connected to the top of the driving box, a balancing pipe is fixedly connected to the side wall of the connecting end, a temperature sensing package is fixedly connected to the other end of the balancing pipe away from the connecting end, and a regulating and changing core mechanism is arranged inside the main body;

[0008] The regulating and changing core mechanism comprises a rotating cylinder 1 arranged inside the main body, a valve core component is arranged inside the rotating cylinder 1, a carrying plate is arranged at the bottom of the valve core component, a limiting member is slidably arranged on the side wall of the carrying plate, a connecting cylinder is fixedly arranged at the bottom of the limiting member, a bottom disc is fixedly arranged at the bottom of the connecting cylinder, a rotating cylinder 2 is arranged on the outer wall of the connecting cylinder, a short rod is arranged at the bottom of the rotating cylinder 2, a connecting disc is fixedly arranged on the outer wall of the bottom disc, a sliding ring is fixedly arranged on the top of the connecting disc, a clamping column is movably arranged on the side wall of the sliding ring, a threaded rod is fixedly arranged on the end of the clamping column away from the driving rod, and a knob is fixedly arranged on the end of the threaded rod away from the clamping column;

[0009] The regulating and changing core mechanism is used to maintain the sealing performance inside the main body when the valve core component is replaced.

[0010] By adopting the above technical solution, the diameter of the knob is larger than the diameter of the threaded rod, and the diameter of the clamping column is larger than the diameter of the threaded rod. Therefore, when the staff drives the threaded rod to rotate to the farthest or closest point to the sliding ring through the knob, the threaded rod can be limited by the knob and the clamping column, thereby avoiding the failure of the threaded rod to separate from the mechanism.

[0011] Preferably, the regulating core-changing mechanism also includes a diaphragm fixedly connected to the inside of the driving box, the bottom of the diaphragm is fixedly connected to a driving rod, the inner wall of the driving box is fixedly connected to a fixed cylinder, the outer wall of the fixed cylinder is fitted with a rotating cylinder 1 fixedly connected to the bottom of the driving box, the outer wall of the rotating cylinder 1 is fitted with the inner wall of the main body, the inner wall of the fixed cylinder is fixedly connected with a limiting disk that movably penetrates the outer wall of the driving rod, the middle inner wall of the fixed cylinder is fixedly connected with an auxiliary ring, the inner wall of the auxiliary ring is fixedly connected with a supporting piece that movably penetrates the side wall of the driving rod, the bottom of the fixed cylinder is fixedly connected with a connecting piece that fits with the inner wall of the rotating cylinder 1, the inner wall of the connecting piece is clamped with a valve core component clamped with the bottom of the driving rod, the side wall of the lower half of the connecting piece is fixedly connected with a clamping ring, and the top of the clamping ring is fitted with a rotating ring clamped with the connecting piece.

[0012] By adopting the above technical solution, the top of the fixed cylinder is kept flush with the bottom of the inner wall of the driving box, so that when the diaphragm drives the driving rod to move vertically downward, the fixed cylinder will not interfere with the deformation of the diaphragm. The support member is composed of a ring and multiple connecting rods, thereby supporting the driving rod while ensuring that the liquid can flow smoothly.

[0013] Preferably, the outer wall of the rotating ring is fixedly connected to a connecting cylinder that fits with the inner wall of rotating cylinder one, the bottom of rotating cylinder one is fixedly connected to rotating cylinder two that fits with the outer wall of connecting cylinder, the outer wall of rotating cylinder two is fixedly connected to a clamping ring that is slidably connected to the main body, and the bottom of the valve core component fits with the top of the mounting plate.

[0014] By adopting the above technical solution, the top of the valve core component and the top of the connecting piece are kept level, thereby maintaining tightness and avoiding the valve from closing loosely.

[0015] Preferably, the side wall of the carrying plate is clamped with the limiting member, a telescopic rod is fixedly connected to the bottom of the carrying plate, the bottom of the limiting member is fixedly connected to the connecting cylinder, and a spring fixedly connected to the bottom of the carrying plate is sleeved on the outside of the telescopic rod.

[0016] By adopting the above technical solution, the diameter of the spring is smaller than that of the mounting plate, so that the spring will not interfere with the vertical movement of the mounting plate.

[0017] Preferably, the bottom of the spring is fixedly connected to the connecting cylinder, the bottom of the telescopic rod is fixedly connected to the connecting cylinder, the bottom of the connecting cylinder is fixedly connected to the top of the bottom disc, the top of the short rod is fixedly connected to the bottom of the rotating cylinder, and the short rod movably passes through the bottom disc.

[0018] By adopting the above technical solution, the diameter of the bottom disc is larger than the bottom diameter of the connecting cylinder, thereby facilitating the connection of the bottom disc with other structures.

[0019] Preferably, the outer wall of the bottom disk is fixedly connected to the inner wall of the connecting disk, the top of the connecting disk is fixedly connected to the bottom of the sliding ring, and the side wall of the sliding ring is slidably connected to the limiting ring.

[0020] By adopting the above technical solution, the limiting ring limits the inner and outer diameters of the sliding ring at the same time, thereby making the rotation more stable.

[0021] Preferably, the outer wall of the limiting ring is fixedly connected with a vertical plate, one end of the vertical plate away from the limiting ring is fixedly connected with a horizontal plate, and the side wall of the horizontal plate and the threaded rod are threadedly penetrated.

[0022] By adopting the above technical solution, the vertical plates are symmetrically arranged, so that the connection is more stable.

[0023] Preferably, the end of the threaded rod away from the limiting ring is fixedly connected to the knob, the end of the threaded rod close to the limiting ring is fixedly connected to the clamping column, the side wall of the clamping column movably passes through the limiting ring, the side wall of the clamping column movably passes through the sliding ring, and the top of the limiting ring is fixedly connected to the bottom of the main body.

[0024] By adopting the above technical solution, the outer wall diameter of the limiting ring is consistent with the outer wall diameter of the main body, so that the connection alignment is more accurate.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The threaded rod is driven to move horizontally by turning the knob, so that the clamping column and the sliding ring are released from the clamping state, and then the connecting disc is rotated, so that the connecting disc drives the rotating cylinder 2 to rotate through the short rod, and the rotating cylinder 2 rotates synchronously with the connecting cylinder, thereby driving the rotating cylinder 1 to rotate, so that when the valve core component needs to be replaced, the inlet pipe and the outlet pipe are closed synchronously, so as to prevent the accidental leakage of condensate when replacing the valve core, thereby protecting the safety of the operator, preventing the refrigerant from directly contacting the operator, and reducing potential health risks;

[0027] 2. By pulling the bottom disc downward, the bottom disc drives the limiter to move downward out of the main body through the connecting cylinder, so that the mounting plate moves out of the inner wall of the main body. Then the staff can replace the valve core component. Since the inlet pipe and the outlet pipe are sealed at this time, the staff can replace the valve core component without stopping the entire pipeline, reducing the operation steps and reducing the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram showing the overall structure of the thermal expansion valve with replaceable valve core in this application;

[0029] Figure 2 This is a cross-sectional view of the internal structure of the thermal expansion valve with replaceable valve core in this application;

[0030] Figure 3 A partial view showing the diaphragm of a thermal expansion valve with a replaceable valve core in this application;

[0031] Figure 4 A partial cross-sectional view of the driving rod of the thermal expansion valve with replaceable valve core in the present application;

[0032] Figure 5 A partial cross-sectional view of a valve core component of a thermal expansion valve with a replaceable valve core in the present application;

[0033] Figure 6 A partial cross-sectional view of the telescopic rod of the thermal expansion valve with replaceable valve core in the present application;

[0034] Figure 7 Thermal expansion valve with replaceable valve core for this application Figure 6 A partial enlarged view of the middle A;

[0035] Figure 8 A partial view showing the bottom disc of the thermal expansion valve with replaceable valve core in this application;

[0036] Fig. 9 Thermal expansion valve with replaceable valve core for this application Figure 8 Partial display diagram at B in the middle;

[0037] Fig.10 This is a separate display diagram of the parts at the rotating ring of the thermal expansion valve with a replaceable valve core in this application.

[0038] Reference numerals:

[0039] 1. Main body; 11. Inflow pipe; 12. Outflow pipe; 13. Drive box; 14. Connection end; 15. Balance pipe; 16. Temperature sensing package;

[0040] 2. regulating and changing core mechanism; 21. diaphragm; 22. driving rod; 23. fixed cylinder; 24. rotating cylinder 1; 25. limiting disc; 26. auxiliary ring; 27. supporting member; 28. connecting member; 29. ​​valve core component; 210. clamping ring; 211. rotating ring; 212. connecting cylinder; 213. rotating cylinder 2; 214. clamping ring;

[0041] 215, mounting plate; 216, limiting member; 217, telescopic rod; 218, spring; 219, bottom disc; 220, short rod; 221, connecting disc; 222, sliding ring; 223, limiting ring;

[0042] 224, vertical plate; 225, horizontal plate; 226, threaded rod; 227, knob; 228, clamping column. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-Figure 10 This application is described in further detail.

[0044] An embodiment of the present application discloses a thermal expansion valve with a replaceable valve core.

[0045] Reference Figure 1 A thermal expansion valve with a replaceable valve core includes a main body 1, an inlet pipe 11 fixedly connected to the side wall of the upper half of the main body 1, an outlet pipe 12 fixedly connected to the side wall of the lower half of the main body 1, a drive box 13 fixedly connected to the top of the main body 1, a connecting end 14 fixedly connected to the top of the drive box 13, a balance pipe 15 fixedly connected to the side wall of the connecting end 14, a temperature sensing package 16 fixedly connected to the other end of the balance pipe 15 away from the connecting end 14, and a regulating and changing core mechanism 2 is arranged inside the main body 1, and the regulating and changing core mechanism 2 is used to maintain the sealing inside the main body 1 when the valve core component 29 is replaced.

[0046] The staff connects the inflow pipe 11 and the outflow pipe 12 into the pipeline, and then the staff wraps the temperature sensing package 16 with the outer wall of the outflow pipe 12 , so as to facilitate sensing the temperature inside the outflow pipe 12 through the temperature sensing package 16 .

[0047] Reference Figure 2 , Figure 3The regulating core-changing mechanism 2 includes a rotating cylinder 24 arranged inside the main body 1, a valve core component 29 arranged inside the rotating cylinder 24, a mounting plate 215 arranged at the bottom of the valve core component 29, a limiter 216 slidably arranged on the side wall of the limiter disc 25, a connecting cylinder 212 fixedly arranged at the bottom of the limiter 216, a bottom disc 219 fixedly arranged at the bottom of the connecting cylinder 212, a short rod 220 arranged at the bottom of the rotating cylinder 213, the rotating cylinder 213 arranged on the outer wall of the connecting cylinder 212, a connecting disc 221 fixedly arranged on the outer wall of the bottom disc 219, a sliding ring 222 fixedly arranged on the top of the connecting disc 221, and a clamping column 228 movably arranged on the side wall of the sliding ring 222 The threaded rod 226 is fixedly arranged at one end of the clamping column 228 away from the driving rod 22, and the knob 227 is fixedly arranged at one end of the threaded rod 226 away from the clamping column 228. The regulating core changing mechanism 2 also includes a diaphragm 21 fixedly connected to the inside of the driving box 13, the driving rod 22 is fixedly connected to the bottom of the diaphragm 21, and the top of the driving rod 22 is fixedly connected to the center position of the bottom of the diaphragm 21, so that the transmission is more stable, the fixed cylinder 23 is fixedly connected to the inner wall of the driving box 13, the outer wall of the fixed cylinder 23 is fixedly connected to the rotating cylinder 24, the top of the rotating cylinder 24 is fixedly connected to the bottom of the driving box 13, and the inner wall of the rotating cylinder 24 is consistent with the outer wall of the fixed cylinder 23, so that the connection is tighter.

[0048] When the valve core needs to be replaced, the staff rotates the knob 227 , and the knob 227 drives the threaded rod 226 to rotate. The threaded rod 226 is limited by the cross plate 225 and moves horizontally.

[0049] Reference Figure 4 , Figure 5 The outer wall of the rotating cylinder 24 fits with the inner wall of the main body 1, and the outer wall of the rotating cylinder 24 is consistent with the inner wall of the main body 1, so that the rotating cylinder 24 is fixedly connected to the main body 1, the inner wall of the fixed cylinder 23 is fixedly connected to the outer wall of the limiting disc 25, and the top of the limiting disc 25 is consistent with the top of the fixed cylinder 23, so that the connection is more stable, and a circular hole 1 is opened through the top of the limiting disc 25, and the outer wall of the driving rod 22 movably passes through the circular hole 1, so that the driving rod 22 is slidably connected to the limiting disc 25, and the inner wall of the middle part of the fixed cylinder 23 is fixedly connected to the outer wall of the auxiliary ring 26. The fixed cylinder 23 is fixedly connected to the auxiliary ring 26, the inner wall of the auxiliary ring 26 is fixedly connected to one end of the support member 27 close to the auxiliary ring 26, the top of the support member 27 is penetrated with a second circular hole, the side wall of the driving rod 22 movably penetrates the second circular hole, so that the driving rod 22 and the support member 27 can be movably penetrated, the bottom of the fixed cylinder 23 is fixedly connected to the top of the connecting member 28, the outer wall of the fixed cylinder 23 is consistent with the outer wall of the connecting member 28, so that the connection is more stable and tight, the outer wall of the connecting member 28 is in contact with the inner wall of the rotating cylinder 24, so as to maintain the sealing and avoid water leakage.

[0050] When the threaded rod 226 moves horizontally, it will drive the clamping column 228 to move horizontally synchronously, and the clamping column 228 will release the connection with the limiting ring 223 and the sliding ring 222. Then the staff rotates the connecting disk 221, and the connecting disk 221 will drive the sliding ring 222 to rotate.

[0051] Reference Figure 6 , Figure 7 The inner wall of the connecting piece 28 is snap-fitted with the outer wall of the valve core component 29. The shape of the valve core component 29 is set to be a truncated cone. The hole position opened on the inner wall of the connecting piece 28 is consistent with the shape of the valve core component 29, so that the snap-fit ​​is tighter. A circular snap-fit ​​groove is opened on the top of the valve core component 29. The bottom of the driving rod 22 is snap-fitted into the snap-fit ​​groove, so that the driving rod 22 drives the valve core component 29 to move more stably without misalignment. The side wall of the lower half of the connecting piece 28 is fixedly connected to the inner wall of the snap ring 210. The top of the snap ring 210 fits with the bottom of the rotating ring 211, and the rotating ring 211 is snap-fitted with the connecting piece 28. The rotating ring 211 is consistent in size with the clamping ring 210, so that the connection is tighter, the outer wall of the rotating ring 211 is fixedly connected with the inner wall of the connecting cylinder 212, and the connecting cylinder 212 fits against the inner wall of the rotating cylinder 24, so that the rotating cylinder 24 limits the connecting cylinder 212, the bottom of the rotating cylinder 24 is fixedly connected with the top of the rotating cylinder 213, the rotating cylinder 213 fits against the outer wall of the connecting cylinder 212, and the diameter of the connecting cylinder 212 is consistent with that of the rotating cylinder 24, so that the connection is more stable, the sealing is maintained, and leakage problems caused by inconsistent sizes are avoided.

[0052] The connecting disc 221 will also drive the bottom disc 219 to rotate, the bottom disc 219 will drive the connecting cylinder 212 to rotate, the bottom disc 219 will also drive the short rod 220 to rotate, the short rod 220 will drive the rotating cylinder 213 to rotate, the rotating cylinder 213 will drive the rotating cylinder 1 24 to rotate, at this time, the hole position of the side wall of the rotating cylinder 213 will be staggered with the outflow pipe 12, so that the outflow pipe 12 is disconnected from the inside of the main body 1.

[0053] Reference Figure 7 , Figure 8The outer wall of the rotating cylinder 213 is fixedly connected to the inner wall of the clamping ring 214, and a circular rotating groove is provided on the inner wall of the main body 1. The clamping ring 214 is slidably connected to the circular rotating groove, so that the clamping ring 214 is rotatably connected to the main body 1. The bottom of the valve core component 29 is fitted with the top of the carrying plate 215, and the side wall of the carrying plate 215 is clamped with the limiting member 216. The limiting member 216 is set in an L shape, so that the vertical movement of the carrying plate 215 is limited by the limiting member 216. The bottom of the limiting member 216 is fixedly connected to the bottom of the inner wall of the connecting cylinder 212, and the bottom of the carrying plate 215 is connected to the telescopic rod 2 17 is fixedly connected at the telescopic end, the spring 218 is sleeved on the outside of the telescopic rod 217, the bottom of the spring 218 is fixedly connected to the bottom of the mounting plate 215, so that the spring 218 is fixed by the mounting plate 215, the bottom of the spring 218 is fixedly connected to the top of the connecting cylinder 212, the fixed end of the telescopic rod 217 is fixedly connected to the top of the connecting cylinder 212, so that the mounting plate 215 is constrained by the telescopic rod 217 and can only move vertically, the bottom of the connecting cylinder 212 is fixedly connected to the top of the bottom disk 219, so that the bottom disk 219 can drive the connecting cylinder 212 to move.

[0054] When the rotating cylinder 24 rotates, the hole position of the side wall of the rotating cylinder 24 will be offset from the inlet pipe 11, so that the inlet pipe 11 is disconnected from the inside of the main body 1, thereby sealing the inlet pipe 11 and the outlet pipe 12. When the connecting cylinder 212 rotates, it will drive the rotating ring 211 to rotate synchronously, so that the rotating ring 211 and the clamping ring 210 are released from the clamping state, so that the connecting cylinder 212 can move vertically, so that the connecting cylinder 212 can be removed from the inside of the main body 1.

[0055] Reference Fig. 9 , Fig.10The top of the short rod 220 is fixedly connected to the bottom of the second rotating cylinder 213, so that the bottom disc 219 can drive the second rotating cylinder 213 to move, and the bottom of the second rotating cylinder 213 is kept at the same height as the bottom of the connecting cylinder 212, so that the connection is more stable, and the bottom disc 219 is penetrated by a second round hole, and the short rod 220 movably penetrates the second round hole, so that the short rod 220 is slidably connected to the bottom disc 219, and the outer wall of the bottom disc 219 is fixedly connected to the inner wall of the connecting disc 221, and the outer diameter of the bottom disc 219 is consistent with the inner diameter of the connecting disc 221, so that the bottom disc 219 and the connecting disc 221 are connected. The connection of the connecting disk 221 is more stable, the bottom of the sliding ring 222 is fixedly connected to the top of the connecting disk 221, and the inner and outer diameters of the bottom of the sliding ring 222 are smaller than those of the connecting disk 221, so that the connection is tighter, the side wall of the sliding ring 222 is slidingly connected to the limiting ring 223, the vertical plate 224 is fixedly connected to the outer wall of the limiting ring 223, and the end of the vertical plate 224 away from the limiting ring 223 is fixedly connected to the side wall of the horizontal plate 225, and a threaded hole is opened through the side wall of the horizontal plate 225, and the threaded rod 226 is threadedly penetrated through the threaded hole, so that the threaded rod 226 and the horizontal plate 225 are threadedly connected.

[0056] Then the staff pulls the connecting cylinder 212 out of the main body 1 to replace the valve core component 29 , thereby completing the replacement of the valve core component 29 .

[0057] Reference Figure 8-Figure 10 The knob 227 is fixedly connected to the end of the threaded rod 226 away from the limiting ring 223. The outer wall of the knob 227 is provided with friction grooves, thereby increasing the friction between the surface of the knob 227 and the fingers of the staff, so that it is convenient for the staff to drive the threaded rod 226 to rotate through the knob 227. The clamping column 228 is fixedly connected to the end of the threaded rod 226 close to the limiting ring 223, so that when the threaded rod 226 rotates, it will drive the clamping column 228 to move. The side wall of the limiting ring 223 is penetrated by a circular hole three, and the side wall of the sliding ring 222 is penetrated by a circular hole four. The diameters of the circular holes three and four are consistent, and the circular holes four are consistent with the outer diameters of the clamping column 228. The side wall of the clamping column 228 is The circular holes three and four are movably penetrated, so that the clamping column 228, the limiting ring 223 and the sliding ring 222 are plugged in, and the top of the limiting ring 223 is fixedly connected to the bottom of the main body 1. The side wall of the fixed cylinder 23 is penetrated with a circular hole five, and the side wall of the rotating cylinder one 24 is penetrated with a circular hole six. The diameters of the circular holes five and six are consistent, and the diameter of the circular hole six is ​​consistent with the inner diameter of the inflow pipe 11, so that it is convenient for water to flow into the valve body. The side wall of the connecting cylinder 212 is penetrated with a circular hole seven, and the side wall of the rotating cylinder two 213 is penetrated with a circular hole eight. The diameters of the circular holes seven and eight are consistent, and the circular hole eight is consistent with the inner diameter of the outflow pipe 12, so that it is convenient for water to flow out of the outflow pipe 12.

[0058] During normal use, the temperature sensing package 16 adjusts the air pressure inside the drive box 13 through the balance tube 15 as the temperature of the liquid inside the outflow pipe 12 changes, thereby driving the drive rod 22 to move vertically through the diaphragm 21, thereby driving the valve core component 29 to move vertically, thereby regulating the size of the valve. When the drive rod 22 moves upward, the spring 218 will drive the mounting plate 215 to move upward, thereby driving the valve core component 29 to move vertically upward, thereby improving the stability of the vertical movement of the valve core component 29.

[0059] The balance tube 15, the temperature sensing package 16, the diaphragm 21, and the telescopic rod 217 belong to the prior art, and their structural principles are not described in detail.

[0060] The implementation principle of a thermal expansion valve with a replaceable valve core in the embodiment of the present application is:

[0061] When the valve core needs to be replaced, the staff turns the knob 227, which will drive the threaded rod 226 to rotate. The threaded rod 226 will move horizontally due to the limit of the horizontal plate 225. The threaded rod 226 will drive the clamping column 228 to move horizontally synchronously when it moves horizontally. The clamping column 228 will release the connection with the limiting ring 223 and the sliding ring 222. Then the staff turns the connecting disk 221, which will drive the rotating cylinder 24 to rotate, thereby sealing the inlet pipe 11 and the outlet pipe 12. When the connecting cylinder 212 rotates, it will drive the rotating ring 211 to rotate synchronously, so that the rotating ring 211 and the clamping ring 2 10 releases the clamping state, so that the connecting cylinder 212 can move vertically, so that the valve core component 29 can be replaced. During normal use, the temperature-sensing package 16 adjusts the air pressure inside the driving box 13 through the balance tube 15 as the temperature of the liquid inside the outflow pipe 12 changes, so that the driving rod 22 is driven to move vertically through the diaphragm 21, thereby driving the valve core component 29 to move vertically, so as to adjust the size of the valve. When the driving rod 22 moves upward, the spring 218 will drive the mounting plate 215 to move upward, thereby driving the valve core component 29 to move vertically upward, so as to improve the stability of the vertical movement of the valve core component 29.

[0062] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A thermal expansion valve with a replaceable valve core, comprising a main body (1), an inlet pipe (11) being fixedly connected to a side wall of an upper half of the main body (1), an outlet pipe (12) being fixedly connected to a side wall of a lower half of the main body (1), a drive box (13) being fixedly connected to a top of the main body (1), a connecting end (14) being fixedly connected to a top of the drive box (13), a balancing pipe (15) being fixedly connected to a side wall of the connecting end (14), and a temperature sensing package (16) being fixedly connected to the other end of the balancing pipe (15) away from the connecting end (14), characterized in that: A regulating and changing core mechanism (2) is provided inside the main body (1); The regulating and changing core mechanism (2) is used to maintain the sealing performance inside the main body (1) when the valve core component (29) is replaced; The regulating core-changing mechanism (2) comprises a rotating cylinder (24) arranged inside the main body (1), a valve core component (29) being arranged inside the rotating cylinder (24), a mounting plate (215) being arranged at the bottom of the valve core component (29), a limit member (216) being slidably arranged on the side wall of the mounting plate (215), a connecting cylinder (212) being fixedly arranged at the bottom of the limit member (216), a bottom disc (219) being fixedly arranged at the bottom of the connecting cylinder (212), and a rotating cylinder (212) being arranged on the outer wall of the connecting cylinder (212). (213), a short rod (220) is provided at the bottom of the second rotating cylinder (213), a connecting disc (221) is fixedly provided on the outer wall of the bottom disc (219), a sliding ring (222) is fixedly provided on the top of the connecting disc (221), a clamping column (228) is movably provided on the side wall of the sliding ring (222), a threaded rod (226) is fixedly provided at one end of the clamping column (228) away from the driving rod (22), and a knob (227) is fixedly provided at one end of the threaded rod (226) away from the clamping column (228).

2. A thermal expansion valve with a replaceable valve core according to claim 1, characterized in that: The regulating core-changing mechanism (2) further comprises a diaphragm (21) fixedly connected to the interior of the driving box (13); the bottom of the diaphragm (21) is fixedly connected to a driving rod (22); the inner wall of the driving box (13) is fixedly connected to a fixed cylinder (23); the outer wall of the fixed cylinder (23) is fitted with a rotating cylinder 1 (24) fixedly connected to the bottom of the driving box (13); the outer wall of the rotating cylinder 1 (24) is fitted with the inner wall of the main body (1); the inner wall of the fixed cylinder (23) is fixedly connected to a limiting disc (25) movably penetrating the outer wall of the driving rod (22); the fixed cylinder (23) ) is fixedly connected to an auxiliary ring (26) on the inner wall of the middle part; the inner wall of the auxiliary ring (26) is fixedly connected to a support member (27) movably penetrating the side wall of the driving rod (22); the bottom of the fixed cylinder (23) is fixedly connected to a connecting member (28) which is in contact with the inner wall of the rotating cylinder (24); the inner wall of the connecting member (28) is clamped with a valve core member (29) which is clamped with the bottom of the driving rod (22); the lower half of the connecting member (28) is fixedly connected to a clamping ring (210); the top of the clamping ring (210) is clamped with a rotating ring (211) which is clamped with the connecting member (28).

3. A thermal expansion valve with replaceable valve core according to claim 2, characterized in that: The outer wall of the rotating ring (211) is fixedly connected to a connecting cylinder (212) that fits with the inner wall of the rotating cylinder 1 (24); the bottom of the rotating cylinder 1 (24) is fixedly connected to a rotating cylinder 2 (213) that fits with the outer wall of the connecting cylinder (212); the outer wall of the rotating cylinder 2 (213) is fixedly connected to a clamping ring (214) that is slidably connected to the main body (1); and the bottom of the valve core component (29) fits with the top of the mounting plate (215).

4. A thermal expansion valve with replaceable valve core according to claim 3, characterized in that: The side wall of the carrying plate (215) is clamped with the limiting member (216); a telescopic rod (217) is fixedly connected to the bottom of the carrying plate (215); the bottom of the limiting member (216) is fixedly connected to the connecting cylinder (212); and a spring (218) fixedly connected to the bottom of the carrying plate (215) is sleeved on the outside of the telescopic rod (217).

5. A thermal expansion valve with replaceable valve core according to claim 4, characterized in that: The bottom of the spring (218) is fixedly connected to the connecting cylinder (212), the bottom of the telescopic rod (217) is fixedly connected to the connecting cylinder (212), the bottom of the connecting cylinder (212) is fixedly connected to the top of the bottom disc (219), the top of the short rod (220) is fixedly connected to the bottom of the second rotating cylinder (213), and the short rod (220) movably passes through the bottom disc (219).

6. A thermal expansion valve with a replaceable valve core according to claim 5, characterized in that: The outer wall of the bottom disk (219) is fixedly connected to the inner wall of the connecting disk (221), the top of the connecting disk (221) is fixedly connected to the bottom of the sliding ring (222), and the side wall of the sliding ring (222) is slidably connected to the limiting ring (223).

7. A thermal expansion valve with a replaceable valve core according to claim 6, characterized in that: The outer wall of the limiting circular ring (223) is fixedly connected to a vertical plate (224), one end of the vertical plate (224) away from the limiting circular ring (223) is fixedly connected to a horizontal plate (225), and a side wall of the horizontal plate (225) and a threaded rod (226) are threadedly penetrated.

8. The thermal expansion valve with replaceable valve core according to claim 7, characterized in that: One end of the threaded rod (226) away from the limiting ring (223) is fixedly connected to the knob (227), and one end of the threaded rod (226) close to the limiting ring (223) is fixedly connected to the clamping column (228); the side wall of the clamping column (228) movably penetrates the limiting ring (223); the side wall of the clamping column (228) movably penetrates the sliding ring (222); and the top of the limiting ring (223) is fixedly connected to the bottom of the main body (1).

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