Needle-shaped valve element type servo valve with high-temperature and high-pressure protection function

Abstract

The utility model relates to the technical field of valves, in particular to a needle-shaped valve core type servo valve with high-temperature and high-pressure protection, which comprises a shell, a mounting cylinder is fixedly mounted on the upper surface of the shell, a valve cavity penetrating into the shell is formed in the inner bottom wall of the mounting cylinder, and a valve needle rod is arranged in the valve cavity. Water through holes penetrating into the valve cavity are formed in the two sides of the shell, blocking mechanisms are arranged on the surface of the valve needle rod and in the mounting cylinder, a cooling mechanism is arranged on the upper surface of the shell, and the cooling mechanism comprises a water tank and a water pump which are fixedly mounted on the upper surface of the shell. Through the cooling mechanism, water in the water tank flows into the water passing cavity, the water in the water passing cavity is pumped into the water tank under the operation of the water pump, the circulation is performed, so that the water in the water passing cavity reaches a circular flowing state, meanwhile, the water flow can take away heat of the valve needle rod when passing through the water passing cavity, and the heat of the valve needle rod is dissipated. And loss caused by transmission to a servo assembly of the device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a needle valve core type servo valve with high temperature and high pressure protection. Background Art

[0002] Servo valve is a component mainly used for electro-hydraulic conversion. It can convert tiny electrical signals into high-power hydraulic energy output. Needle valve is a valve that can be precisely adjusted. It is widely used, mainly including stop valve and ball valve. Its function is to open or cut off the pipeline. The valve core of the needle valve is a very sharp cone, which is inserted into the valve seat like a needle.

[0003] When the valve body is in the state of being in a ...

[0004] However, the above scheme still has shortcomings. When the valve of the above scheme is installed and used in a long-term hot flow pipeline, the valve core will heat up and increase the temperature together with the blocked heat flow, and transfer the high temperature to the servo component that controls the operation of the valve. There is a lack of cooling and heat-resistant mechanisms. Over time, high heat will cause damage to the servo component. In addition, the blocking mechanism of the above scheme is too cumbersome and complex in structure, which increases the difficulty of its production. In view of this, the utility model proposes a needle valve core type servo valve with high temperature and high pressure protection. Utility Model Content

[0005] The utility model aims to provide a needle valve core type servo valve with high temperature and high pressure protection to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a needle valve core type servo valve with high temperature and high pressure protection, comprising a housing, a mounting cylinder is fixedly mounted on the upper surface of the housing, a valve cavity penetrating into the interior of the housing is formed on the inner bottom wall of the mounting cylinder, a valve needle rod is arranged inside the valve cavity, water holes penetrating into the interior of the valve cavity are formed on both sides of the housing, a blocking mechanism is arranged on the surface of the valve needle rod and the interior of the mounting cylinder, and a cooling mechanism is arranged on the upper surface of the housing;

[0007] The cooling mechanism includes a water tank and a water pump which are respectively fixedly mounted on the upper surface of the shell. A water passage cavity is opened inside the rod body of the valve needle rod. The water pumping end of the water pump extends into the water passage cavity. The water outlet end of the water pump is connected with the interior of the water tank. A return pipe connected with the interior of the water passage cavity is arranged on the right side of the water tank. Semiconductor refrigeration plates and heaters are respectively embedded on the left surface and the upper surface of the water tank.

[0008] As a preferred technical solution, the water pumping end and the return pipe of the water pump are both telescopic hoses.

[0009] As a preferred technical solution, one side of the semiconductor refrigeration plate is a heat dissipation end, and the other side of the semiconductor refrigeration plate is a cooling end. The cooling end of the semiconductor refrigeration plate and the heating end of the heater both extend into the interior of the water tank.

[0010] As a preferred technical solution, the blocking mechanism includes an annular water groove opened on the surface of the valve needle rod and adapted to the two water holes. A motor is fixedly installed on the upper surface of the mounting cylinder. The output shaft of the motor extends to the interior of the mounting cylinder and is fixedly connected to a threaded rod. The surface of the threaded rod is threadedly connected to a threaded cylinder, and the lower end of the threaded cylinder is fixedly connected to the upper end of the valve needle rod.

[0011] As a preferred technical solution, guide slide blocks are provided on both side surfaces of the threaded cylinder, and guide grooves for the guide slide blocks to slide are provided on both side inner walls of the mounting cylinder.

[0012] As a preferred technical solution, connecting pipes penetrating into the water holes are embedded on both sides of the shell, water pipes are threadedly connected to the surfaces of the connecting pipes, and reinforcement anti-slip mechanisms for fixing the water pipes are provided on both side surfaces of the shell.

[0013] As a preferred technical solution, the reinforcement anti-slip mechanism includes threaded rings fixedly connected to both sides of the shell and corresponding to the connecting pipes, the ends of the threaded rings are fixedly connected to elastic blocks, the surface of the threaded rings is threadedly connected to an operating ring, and the surface of the operating ring is rotatably connected to a resist ring.

[0014] As a preferred technical solution, the number of the elastic blocks is four, and the four elastic blocks are arranged in a circular array at the end of the threaded ring. Beneficial Effects

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model uses a cooling mechanism, and the water in the water tank flows into the water passage cavity, and the water in the water passage cavity is pumped into the water tank under the operation of the water pump, so that the water in the water passage cavity reaches a circulating flow state. At the same time, the water flow can take away the heat of the valve needle rod when passing through the water passage cavity, avoiding the heat being transferred to the servo component of the device to cause loss.

[0017] The utility model uses a blocking mechanism. The operation of the motor drives the threaded rod to rotate. The threaded barrel drives the valve needle rod to move upward in the valve cavity through the rotation of the threaded rod, so that the annular water groove on the surface of the valve needle rod corresponds to the two water holes, which can play a role in water passing. Otherwise, it has a blocking effect. The structure is simple and its casting cost and difficulty are reduced.

[0018] The utility model reinforces the anti-drop mechanism. When the valve is assembled with an external water pipe, the operating ring is rotated to drive the abutting ring to move on the surface of the threaded ring until the abutting ring abuts against the elastic block to deform it. The deformed elastic block can cling to the surface of the water pipe to fix it, thereby achieving the goal of strengthening the firmness of the connection between the valve and the water pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the front section structure of the utility model;

[0022] Figure 3 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the valve needle rod of the utility model.

[0024] In the figure: 1. Shell; 2. Mounting cylinder; 3. Valve needle rod; 4. Water hole; 5. Water tank; 6. Water pump; 7. Water cavity; 8. Semiconductor cooling plate; 9. Heater; 10. Annular water groove; 11. Motor; 12. Threaded rod; 13. Threaded cylinder; 14. Connecting pipe; 15. Water pipe; 16. Threaded ring; 17. Elastic block; 18. Operating ring; 19. Thrust ring. DETAILED DESCRIPTION

[0025] 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.

[0026] According to the attached Figure 1-Figure 4 As shown, an embodiment of the utility model provides a needle valve core type servo valve with high temperature and high pressure protection, including a shell 1, a mounting cylinder 2 is fixedly installed on the upper surface of the shell 1, the inner bottom wall of the mounting cylinder 2 is provided with a valve cavity penetrating into the interior of the shell 1, a valve needle rod 3 is arranged inside the valve cavity, water holes 4 penetrating into the interior of the valve cavity are arranged on both sides of the shell 1, a blocking mechanism is arranged on the surface of the valve needle rod 3 and the interior of the mounting cylinder 2, and a cooling mechanism is arranged on the upper surface of the shell 1.

[0027] The cooling mechanism includes a water tank 5 and a water pump 6 which are respectively fixedly mounted on the upper surface of the shell 1. A water passage cavity 7 is opened inside the rod body of the valve needle rod 3. The water pumping end of the water pump 6 extends into the water passage cavity 7. The water outlet end of the water pump 6 is connected with the interior of the water tank 5. A return pipe connected with the interior of the water passage cavity 7 is arranged on the right side of the water tank 5. Both the water pumping end and the return pipe of the water pump 6 are telescopic hoses. Semiconductor refrigeration sheets 8 and heaters 9 are respectively embedded on the left side surface and the upper surface of the water tank 5. One side of the semiconductor refrigeration sheet 8 is a heat dissipation end, and the other side of the semiconductor refrigeration sheet 8 is a cooling end. The cooling end of the semiconductor refrigeration sheet 8 and the heating end of the heater 9 both extend to the interior of the water tank 5.

[0028] The blocking mechanism includes an annular water groove 10 which is opened on the surface of the valve needle rod 3 and adapted to the two water holes 4. A motor 11 is fixedly installed on the upper surface of the mounting tube 2. The output shaft of the motor 11 extends to the interior of the mounting tube 2 and is fixedly connected to a threaded rod 12. A threaded tube 13 is threadedly connected to the surface of the threaded rod 12. The lower end of the threaded tube 13 is fixedly connected to the upper end of the valve needle rod 3. Guide sliders are provided on both side surfaces of the threaded tube 13, and guide grooves for the guide sliders to slide are provided on the inner walls on both sides of the mounting tube 2.

[0029] Both sides of the shell 1 are embedded with connecting pipes 14 that penetrate into the water through hole 4, and the surface of the connecting pipe 14 is threadedly connected to a water pipe 15. Both side surfaces of the shell 1 are provided with a reinforcement anti-slip mechanism for fixing the water pipe 15. The reinforcement anti-slip mechanism includes threaded rings 16 that are respectively fixedly connected to both sides of the shell 1 and correspond to the connecting pipes 14. The ends of the threaded rings 16 are fixedly connected to elastic blocks 17. The surface of the threaded ring 16 is threadedly connected to an operating ring 18. The surface of the operating ring 18 is rotatably connected to a resist ring 19. There are four elastic blocks 17, and the four elastic blocks 17 are arranged in a circular array at the ends of the threaded ring 16.

[0030] When the needle valve core type servo valve with high temperature and high pressure protection of the utility model is in use, the operation of the motor 11 drives the threaded rod 12 to rotate. Under the guiding action of the guide slider, the threaded cylinder 13 drives the valve needle rod 3 to move up in the valve cavity through the rotation of the threaded rod 12, so that the annular water groove 10 on the surface of the valve needle rod 3 corresponds to the two water holes 4, which can play a role in water passing, otherwise it has a blocking effect. When the valve is operated in a hotter environment, the water in the water tank 5 flows into the water passing cavity 7, and the water in the water passing cavity 7 is pumped into the water tank 5 under the operation of the water pump 6, so that the water in the water passing cavity 7 reaches a circulating flow state. At the same time, the water flow can pass the valve needle rod 3 when passing through the water passing cavity 7. Heat is taken away, and the operation of the semiconductor refrigeration sheet 8 can cool the water in the water tank 5 to reduce its temperature and improve its cooling effect. At the same time, when the valve is operated in a cold environment, the heater 9 can heat the water in the water tank 5, and under the action of hot water, the valve needle rod 3 can be prevented from freezing in the valve cavity, thereby further improving the practicality of the valve. When assembling the valve with the external water pipe 15, the operating ring 18 is rotated to drive the retaining ring 19 to move on the surface of the threaded ring 16 until the retaining ring 19 is against the elastic block 17 to deform it. The deformed elastic block 17 can be close to the surface of the water pipe 15 to fix it, thereby strengthening the firmness of the connection between the valve and the water pipe 15.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A needle valve core type servo valve with high temperature and high pressure protection, characterized in that: The invention comprises a shell (1), a mounting cylinder (2) being fixedly mounted on the upper surface of the shell (1), a valve cavity penetrating into the interior of the shell (1) being provided on the inner bottom wall of the mounting cylinder (2), a valve needle rod (3) being provided inside the valve cavity, water holes (4) penetrating into the interior of the valve cavity being provided on both sides of the shell (1), a blocking mechanism being provided between the surface of the valve needle rod (3) and the interior of the mounting cylinder (2), and a cooling mechanism being provided on the upper surface of the shell (1); The cooling mechanism comprises a water tank (5) and a water pump (6) respectively fixedly mounted on the upper surface of the housing (1); a water passage cavity (7) is provided inside the rod body of the valve needle rod (3); a water pumping end of the water pump (6) extends into the interior of the water passage cavity (7); a water outlet end of the water pump (6) is connected to the interior of the water tank (5); a return pipe connected to the interior of the water passage cavity (7) is provided on the right side of the water tank (5); and a semiconductor cooling plate (8) and a heater (9) are respectively embedded on the left surface and the upper surface of the water tank (5).

2. A needle valve core type servo valve with high temperature and high pressure protection according to claim 1, characterized in that: The water pumping end and the return pipe of the water pump (6) are both telescopic hoses.

3. The needle valve core type servo valve with high temperature and high pressure protection according to claim 1, characterized in that: One side of the semiconductor refrigeration sheet (8) is a heat dissipation end, and the other side of the semiconductor refrigeration sheet (8) is a refrigeration end. The refrigeration end of the semiconductor refrigeration sheet (8) and the heating end of the heater (9) both extend into the interior of the water tank (5).

4. The needle valve core type servo valve with high temperature and high pressure protection according to claim 1, characterized in that: The blocking mechanism comprises an annular water groove (10) formed on the surface of the valve needle rod (3) and adapted to the two water holes (4); a motor (11) is fixedly mounted on the upper surface of the mounting tube (2); an output shaft of the motor (11) extends into the interior of the mounting tube (2) and is fixedly connected to a threaded rod (12); a threaded tube (13) is threadedly connected to the surface of the threaded rod (12); and the lower end of the threaded tube (13) is fixedly connected to the upper end of the valve needle rod (3).

5. The needle valve core type servo valve with high temperature and high pressure protection according to claim 4, characterized in that: Guide slide blocks are provided on both side surfaces of the threaded cylinder (13), and guide slide grooves for the guide slide blocks to slide are provided on both side inner walls of the mounting cylinder (2).

6. The needle valve core type servo valve with high temperature and high pressure protection according to claim 1, characterized in that: Connecting pipes (14) penetrating into the water holes (4) are embedded on both sides of the shell (1), a water pipe (15) is threadedly connected to the surface of the connecting pipe (14), and reinforcing anti-slip mechanisms for fixing the water pipe (15) are provided on both side surfaces of the shell (1).

7. The needle valve core type servo valve with high temperature and high pressure protection according to claim 6, characterized in that: The reinforcement anti-slip mechanism comprises threaded rings (16) respectively fixedly connected to both sides of the housing (1) and corresponding to the connecting pipe (14); elastic blocks (17) are fixedly connected to the ends of the threaded rings (16); an operating ring (18) is threadedly connected to the surface of the threaded ring (16); and a resisting ring (19) is rotatably connected to the surface of the operating ring (18).

8. The needle valve core type servo valve with high temperature and high pressure protection according to claim 7, characterized in that: The number of the elastic blocks (17) is four, and the four elastic blocks (17) are arranged in a circular array at the end of the threaded ring (16).

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