Differential control valve

Abstract

The utility model discloses a differential control valve, which relates to the technical field of control valves and comprises a main body device, the main body device comprises an assembling unit, a first adjusting unit and a second adjusting unit, and the assembling unit comprises a control valve pipe, a sleeve and a closed insertion rod. The first adjusting unit comprises a first control valve pipe, an auxiliary sealing ring, a first plugging ring, a first reset spring and a first positioning ring. The second adjusting unit comprises a second control valve pipe, a second plugging ring, a through hole and a sealing cover plate. According to the utility model, all components in the first adjusting unit and the second adjusting unit are matched for use, so that the device can automatically adjust the pressure in the control valve pipe, the structure is simple, no external power is needed, the later maintenance is convenient, the circulating hole in the first plugging ring is plugged by using the sealing insertion rod, and the operation is convenient. And the sealing effect of the sealing cover plate on the first control valve pipe ensures the sealing performance of the device in the normal use process.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a differential control valve. Background Art

[0002] With the continuous increase of urban buildings and the adjustment of enterprise scale, problems of unbalanced or interrupted medium flow in heating, cooling or power energy systems have arisen. Control valve differential pressure devices have been widely used. However, existing control valve differential pressure devices are not convenient for automatic control and are not convenient for manual control in emergencies, which is not conducive to use.

[0003] In the prior art, a Chinese patent with a publication number of CN217328474U is proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: A new type of automatic control valve pressure difference device, which relates to the field of control valve technology. The utility model includes a valve body, a diversion cavity and a diversion port. The inner side of the valve body is fixed with a diversion cavity, the inner side of the diversion cavity is provided with a diversion groove, and the outer side of the diversion cavity is fixed with two diversion ports. The top of the valve body is equipped with an automatic pressure relief regulating mechanism, which is used to adjust the fluid pressure in the valve body. The bottom of the valve body is equipped with a convenient pressure relief regulating mechanism, which is used to manually adjust the fluid pressure in the valve body. The utility model uses the structural design of the automatic pressure relief regulating mechanism to enable the device to automatically adjust the flow and pressure relief, speed up the work efficiency, and realize the automatic adjustment of the device. In addition, through the structural design of the convenient pressure relief regulating mechanism, the device can effectively adjust the flow and pressure relief in emergencies, thereby improving the safety of the device.

[0004] Although the prior art can effectively adjust the flow and pressure relief in emergencies through the structural design of the convenient pressure relief regulating mechanism during actual use, thereby improving the safety of the device, the structure of the device is too complicated, resulting in high construction and subsequent maintenance costs. Utility Model Content

[0005] The purpose of the utility model is to provide a differential control valve to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A differential control valve comprises a main body device, wherein the main body device comprises an assembly unit, a first regulating unit and a second regulating unit.

[0008] The assembly unit includes a control valve tube, a sleeve and a closed plug rod, the first adjustment unit includes a first control valve tube, an auxiliary closed ring, a first blocking ring, a first return spring and a first positioning ring, and the second adjustment unit includes a second control valve tube, a second blocking ring, a through hole and a closed cover plate.

[0009] A flow hole is opened at one end of the first sealing ring, a through hole is opened on the outer wall of one end of the second control valve pipe, the first regulating unit is located inside the assembly unit, and the second regulating unit is located inside the first regulating unit.

[0010] The above technical solution is adopted, in which the components in the first regulating unit and the second regulating unit are used in coordination, so that the device can automatically adjust the pressure in the control valve pipe. Moreover, the structure is simple, no external power is required, and subsequent maintenance is convenient.

[0011] A further improvement of the technical solution of the utility model is that the inner wall of the first sealing ring is fixedly connected to the outer wall of the first control valve tube, the outer wall of the first sealing ring is slidably connected to the inner wall of the sleeve, and the inner walls at both ends of the sleeve are fixedly connected to the outer wall of the control valve tube.

[0012] The above technical solution is adopted, in which the sealing rod is used to seal the flow hole on the first sealing ring, and the sealing cover plate is used to seal the first control valve pipe, thereby ensuring the sealing performance of the device during normal use.

[0013] A further improvement of the technical solution of the utility model is that: the outer wall of one end of the first control valve tube is slidably connected to the inner wall of the first positioning ring, one end of the first sealing ring is fixedly connected to one end of the first return spring, one end of the first return spring away from the first sealing ring is fixedly connected to one side of the first positioning ring, and the outer wall of the first positioning ring is fixedly connected to the inner wall of the control valve tube.

[0014] The above technical solution is adopted, in which the first return spring, the first positioning ring, the second return spring and the second positioning ring are used in combination, so that the pressure regulation of the control valve pipe by the first control valve pipe and the second control valve pipe can be within a reasonable range, thereby ensuring the accuracy of the regulation.

[0015] A further improvement of the technical solution of the utility model is that the outer wall of one end of the closed plug rod is plugged into the inner wall of the flow hole, and the other end of the closed plug rod is fixedly connected to one end of the control valve pipe.

[0016] A further improvement of the technical solution of the utility model is that the outer wall of the second blocking ring is slidably connected to the inner wall of the first control valve pipe, and the inner wall of the second blocking ring is fixedly connected to the outer wall of the second control valve pipe.

[0017] A further improvement of the technical solution of the utility model is that one end of the second control valve pipe is fixedly connected to one side of the closing cover plate, and one side of the closing cover plate close to the second control valve pipe is movably connected to one end of the first control valve pipe.

[0018] A further improvement of the technical solution of the utility model is that: the end of the second sealing ring close to the closed cover plate is fixedly connected to a second return spring, the end of the second return spring away from the second sealing ring is fixedly connected to a second positioning ring, and the outer wall of the second positioning ring is fixedly connected to the inner wall of the first control valve tube.

[0019] A further improvement of the technical solution of the utility model is that a through groove is provided on one side of the second positioning ring.

[0020] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0021] 1. The utility model provides a differential control valve, which utilizes the coordinated use of the components in the first regulating unit and the second regulating unit so that the device can automatically adjust the pressure in the control valve pipe. Moreover, the structure is simple, no external power is required, and later maintenance is convenient.

[0022] 2. The utility model provides a differential control valve, which utilizes the sealing rod to seal the flow hole on the first sealing ring, and the sealing cover plate to seal the first control valve pipe, thereby ensuring the sealing performance of the device during normal use.

[0023] 3. The utility model provides a differential control valve, which uses a first return spring, a first positioning ring, a second return spring and a second positioning ring in combination, so that the pressure regulation of the first control valve pipe and the second control valve pipe in the control valve pipe can be within a reasonable range, thereby ensuring the accuracy of the regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main device structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the control valve pipe structure details of the utility model;

[0026] Figure 3 It is an enlarged schematic diagram of the structure at A of the utility model;

[0027] Figure 4 This is a schematic diagram of the first control valve pipe structure of the utility model;

[0028] Figure 5 This is a schematic diagram of the second control valve tube structure of the utility model.

[0029] In the figure: 1. main device; 2. control valve tube; 3. sleeve; 4. first control valve tube; 5. second control valve tube; 6. first blocking ring; 7. second blocking ring; 8. auxiliary closing ring; 9. closing cover plate; 10. closing rod; 11. flow hole; 12. first return spring; 13. first positioning ring; 14. through hole; 15. second positioning ring; 16. second return spring. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the embodiments:

[0031] Example 1

[0032] like Figure 1-5 As shown, the utility model provides a differential control valve, including a main body device 1, and the main body device 1 includes an assembly unit, a first regulating unit and a second regulating unit.

[0033] The assembly unit includes a control valve tube 2, a sleeve 3 and a closing rod 10, the first adjustment unit includes a first control valve tube 4, an auxiliary closing ring 8, a first sealing ring 6, a first return spring 12 and a first positioning ring 13, and the second adjustment unit includes a second control valve tube 5, a second sealing ring 7, a through hole 14 and a closing cover plate 9.

[0034] A flow hole 11 is formed at one end of the first sealing ring 6, a through hole 14 is formed on the outer wall of one end of the second control valve tube 5, the first regulating unit is located inside the assembly unit, and the second regulating unit is located inside the first regulating unit.

[0035] The inner wall of the first sealing ring 6 is fixedly connected to the outer wall of the first control valve tube 4, the outer wall of the first sealing ring 6 is slidably connected to the inner wall of the sleeve 3, the inner walls at both ends of the sleeve 3 are fixedly connected to the outer wall of the control valve tube 2, and the reserved area where the sleeve 3 is connected to the two groups of control valve tubes 2 facilitates the sliding sealing of the first sealing ring 6.

[0036] The outer wall of one end of the first control valve tube 4 is slidably connected to the inner wall of the first positioning ring 13, one end of the first blocking ring 6 is fixedly connected to one end of the first return spring 12, and the end of the first return spring 12 away from the first blocking ring 6 is fixedly connected to one side of the first positioning ring 13. The first control valve tube 4 will compress the first return spring 12 when moving, causing it to generate a reaction force. After the pressure relief is completed, the first return spring 12 will drive the first control valve tube 4 to reset, and the outer wall of the first positioning ring 13 is fixedly connected to the inner wall of the control valve tube 2.

[0037] The outer wall of one end of the closed plug rod 10 is plugged into the inner wall of the flow hole 11. The plugging state of the closed plug rod 10 to the flow hole 11 ensures the sealing of the flow hole 11 in a non-ventilated state. The other end of the closed plug rod 10 is fixedly connected to one end of the control valve tube 2.

[0038] Example 2

[0039] like Figure 1-5 As shown, based on Example 1, the utility model provides a technical solution: preferably, the outer wall of the second sealing ring 7 is slidably connected to the inner wall of the first control valve tube 4, and the inner wall of the second sealing ring 7 is fixedly connected to the outer wall of the second control valve tube 5.

[0040] One end of the second control valve tube 5 is fixedly connected to one side of the closing cover plate 9. The closing cover plate 9 has two functions. The first is to block and push the first control valve tube 4 when the left side is under pressure. The second is to pull the second control valve tube 5 to the left when the right side is under pressure. The side of the closing cover plate 9 close to the second control valve tube 5 is movably connected to one end of the first control valve tube 4.

[0041] The end of the second sealing ring 7 close to the closed cover plate 9 is fixedly connected to a second return spring 16. When the closed cover plate 9 moves to the left, the second return spring 16 is compressed to generate a reaction force. When the negative pressure is released, the closed cover plate 9 will reset under the reaction force of the second return spring 16 to re-seal the left end of the first control valve tube 4. The end of the second return spring 16 away from the second sealing ring 7 is fixedly connected to a second positioning ring 15. The outer wall of the second positioning ring 15 is fixedly connected to the inner wall of the first control valve tube 4. A through groove is provided on one side of the second positioning ring 15. The through groove provided on the second positioning ring 15 is used to circulate gas for pressure relief.

[0042] The working principle of the differential control valve is described in detail below.

[0043] like Figure 1-5 As shown, when in use, the control valve tube 2 is fixedly connected to the external pipeline. Later, when the air pressure in the control valve tube 2 is too high, the closing cover plate 9 is pushed by the pressure, driving the first control valve tube 4 and the first sealing ring 6 to slide rightward in the inner wall of the control valve tube 2. As the first sealing ring 6 moves, the closing rod 10 gradually separates from the flow hole 11. When the closing rod 10 releases the blockage of the flow hole 11, the gas enters the other end of the control valve tube 2 through the flow hole 11 to perform pressure relief work.

[0044] When the air pressure in the control valve tube 2 is too low, negative pressure is generated inside the left end of the control valve tube 2. Due to the pressure difference between the left and right sides of the control valve tube 2, the closing cover plate 9 is pressed to move leftward. When the through hole 14 moves with the closing cover plate 9 to break away from the blockage of the left end of the first control valve tube 4, the left and right ends of the control valve tube 2 are connected and the negative pressure is released.

[0045] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A differential control valve, comprising a main device, characterized in that: The main device includes an assembly unit, a first adjustment unit and a second adjustment unit; The assembly unit includes a control valve tube, a sleeve and a closed plug rod, the first adjustment unit includes a first control valve tube, an auxiliary closed ring, a first blocking ring, a first return spring and a first positioning ring, and the second adjustment unit includes a second control valve tube, a second blocking ring, a through hole and a closed cover plate; A flow hole is formed at one end of the first sealing ring, a through hole is formed on an outer wall of one end of the second control valve tube, the first regulating unit is located inside the assembly unit, and the second regulating unit is located inside the first regulating unit.

2. The differential control valve according to claim 1, characterized in that: The inner wall of the first blocking ring is fixedly connected to the outer wall of the first control valve tube, the outer wall of the first blocking ring is slidably connected to the inner wall of the sleeve, and the inner walls at both ends of the sleeve are fixedly connected to the outer wall of the control valve tube.

3. The differential control valve according to claim 1, characterized in that: The outer wall of one end of the first control valve tube is slidably connected to the inner wall of the first positioning ring, one end of the first sealing ring is fixedly connected to one end of the first return spring, one end of the first return spring away from the first sealing ring is fixedly connected to one side of the first positioning ring, and the outer wall of the first positioning ring is fixedly connected to the inner wall of the control valve tube.

4. The differential control valve according to claim 1, characterized in that: The outer wall of one end of the closing plug rod is plugged into the inner wall of the flow hole, and the other end of the closing plug rod is fixedly connected to one end of the control valve pipe.

5. The differential control valve according to claim 1, characterized in that: The outer wall of the second sealing ring is slidably connected to the inner wall of the first control valve pipe, and the inner wall of the second sealing ring is fixedly connected to the outer wall of the second control valve pipe.

6. The differential control valve according to claim 1, characterized in that: One end of the second control valve pipe is fixedly connected to one side of the closing cover plate, and one side of the closing cover plate close to the second control valve pipe is movably connected to one end of the first control valve pipe.

7. The differential control valve according to claim 1, characterized in that: A second return spring is fixedly connected to one end of the second sealing ring close to the closing cover plate, and a second positioning ring is fixedly connected to one end of the second return spring away from the second sealing ring. The outer wall of the second positioning ring is fixedly connected to the inner wall of the first control valve pipe.

8. The differential control valve according to claim 7, characterized in that: A through groove is formed on one side of the second positioning ring.

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