CN-224229378-U - High-precision high-pressure regulating valve capable of automatically eliminating reverse rotation gap and system for preparing edible salt from seawater

CN224229378UCN 224229378 UCN224229378 UCN 224229378UCN-224229378-U

Abstract

The utility model provides a high-precision high-pressure regulating valve capable of automatically eliminating a reverse rotation gap and a sea water salt making system, and belongs to the technical field of regulating valves. The utility model uses the servo motor to ensure high accuracy of flow regulation, has the characteristics of linearly regulating pressure and quick response speed, and does not need to rely on manual or simple electric driving. The regulating valve has compact integral structure, is suitable for a seawater salt making system integrated in a small space of a container, can be set to be horizontal or vertical according to the requirement, and meets the requirement of improving the space utilization rate. The worm gear is vertically designed in the axial direction, so that the regulating valve has self-locking property, and the regulating amplitude of the regulating valve cannot be forced to be changed by impact caused by overlarge water pressure, so that the regulating valve is suitable for high-pressure and low-pressure working conditions. The utility model combines the ball screw part with the servo motor, effectively eliminates transmission backlash, and improves the accuracy of flow adjustment.

Inventors

CAI QIANGBO
WEI YANDONG
SHEN YAN
CHEN YIYUN

Assignees

靖江市亚泰特种材料制造有限公司
上海颐圣计算机系统有限公司
无锡易福高压清洗设备有限公司

Dates

Publication Date: 20260512
Application Date: 20250403

Claims (10)

1. A high-precision high-pressure regulating valve for automatically eliminating a reverse rotation clearance, comprising: A servo motor; The worm is directly or indirectly driven to rotate by the servo motor and is provided with spiral teeth; The peripheral side wall surface of the worm wheel is provided with tooth grooves which are in matched engagement with the spiral teeth, the axis direction of the worm wheel is perpendicular to the axis direction of the worm, the position of the worm wheel is fixed, and the worm wheel is driven by the worm to rotate around the axis of the worm wheel; A ball screw portion penetrating through the worm wheel and partially integrated therewith, the worm wheel rotating about its own axis to indirectly drive the screw of the ball screw portion to displace in a length direction thereof, and The valve core of the stop valve is connected with the screw rod and driven by the screw rod to axially displace, Wherein the two opposite directions of the axial displacement of the valve core are respectively marked as a first direction and a second direction, when the valve core is displaced towards the first direction, the opening and closing degree of the stop valve is reduced, when the valve core is displaced towards the second direction, the opening and closing degree of the stop valve is increased, The water flow in the water inlet flow channel of the stop valve gives the force of the valve core towards the second direction, so that the screw rod indirectly presses the worm wheel in the axial direction to drive the micro displacement of the balls in the ball screw rod part, the screw rod and the worm wheel generate axial pre-tightening, the error generated by the axial clearance between the screw rod and the worm wheel when the worm wheel reversely drives the screw rod to displace is eliminated, and finally the high-precision adjustment of the valve core is realized.
2. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 1, wherein: Wherein, the stop valve includes: The valve body is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are respectively provided with a water inlet flow passage and a water outlet flow passage, the water inlet flow passage and the water outlet flow passage are intersected, and The valve core is connected with the screw rod, is driven by the valve core to displace along the length direction of the screw rod and at least partially penetrates through the water inlet flow channel, so that the plugging degree of the valve core ground valve cone at the junction of the water inlet flow channel and the water outlet flow channel is different, the flow rate of the water outlet flow channel is changed, and the maximum radial outer diameter of the valve cone is at least 0.01-0.2 mm smaller than the inner diameter of the water inlet flow channel.
3. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 2, wherein: Wherein, the valve body includes: the connecting unit is used for allowing one end of the valve core with the valve cone to penetrate and enter, and sealing treatment is carried out between the end and the connecting unit; a water inlet unit comprising the water inlet pipe and communicated with the connecting unit, and The water outlet unit comprises the water outlet pipe and is communicated with the side wall of the connecting unit.
4. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 2, wherein: Wherein, the valve body includes: the switching unit is used for enabling one end of the valve core with the valve cone to penetrate through and enter; The connecting unit comprises a first connecting section, a radial water outlet section and a second connecting section, wherein the first connecting section is communicated with the switching unit, the radial water outlet section is communicated with the first connecting section, the outer diameter of the radial water outlet section is smaller than the outer diameter of the first connecting section, a plurality of openings are formed in the peripheral side wall surface of the radial water outlet section, and the second connecting section is communicated with the radial water outlet section, and the outer diameter of the second connecting section is larger than the outer diameter of the radial water outlet section; The water inlet unit comprises the water inlet pipe and is communicated with the second connecting section; The water outlet unit comprises a rotating piece and a water outlet pipe, wherein the rotating piece is rotatably fixed on the radial water outlet section in a ring mode and is clamped together by the cooperation of the switching unit and the second connecting section, and the rotating piece is communicated with the water outlet pipe.
5. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 4, wherein: Wherein the valve core and the screw rod are detachably screwed by screw threads, The first connecting section and the switching unit are detachably screwed by screw threads and are sealed by a sealing ring, The rotary part and the switching unit are sealed by a sealing ring, the rotary part and the second connecting section are sealed by a sealing ring, The rotary piece is detachably screwed with the water outlet pipe through threads, The water inlet pipe and the second connecting section are detachably screwed together through threads.
6. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 1, wherein: wherein the ball screw portion includes: A first thread groove formed in a hollow manner in a through hole of the worm wheel through which the ball screw portion passes; the inlet and the outlet of the ball return channel are respectively communicated with the two ends of the first thread groove; The screw rod passes through the through hole; The anti-rotation ring is fixed in position and does not rotate, and the anti-rotation ring is penetrated by one end of the screw rod far away from the stop valve and is used for preventing the screw rod from rotating around the axis of the screw rod driven by the worm wheel; A second thread groove which is arranged on the peripheral side wall surface of the screw rod in a coiling and sinking way and is matched with the first thread groove, and The number of the balls is a plurality, one part is clamped by the first thread groove and the second thread groove in a matched way, the other part is embedded in the ball return channel in a whole row, When the worm wheel rotates around the axis of the worm wheel, the ball clamped between the first thread groove and the second thread groove indirectly drives the screw rod to displace along the length direction of the screw rod.
7. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 1, further comprising: Case body, and The bearing frame, set up in the top opening part of box, the worm wheel set up in the box with in the inner space that the bearing frame formed, thereby worm wheel axial upper and lower both ends respectively through thrust bearing with the lower surface of bearing frame with thereby bottom indirect butt in the box makes it can not produce axial displacement when rotating around self axial, thereby the lead screw wears to establish the bottom of the box with the case is connected.
8. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 1, wherein: wherein the cylindrical outer surface of the worm wheel is provided with a plurality of worm gear teeth, The extending direction of the worm gear teeth is parallel to the direction of the central axis of the cylinder of the worm gear, tooth grooves which are engaged with the spiral teeth in a matching way are formed between every two adjacent worm gear teeth, The worm rotates such that the helical teeth advance in the axial direction of the worm so as to make continuous line contact with the worm wheel teeth and force the worm wheel to rotate about its own central axis, Each worm gear tooth comprises straight tooth sections at two ends and an arc tooth section in the middle part which is concave towards the inside of the worm gear, The radian of the bottom of the tooth slot is the same as that of the spiral tooth, and the inner chamfer of the side wall of the tooth slot is matched with the outer chamfer of the spiral tooth.
9. The high-precision high-pressure regulating valve for automatically eliminating a reverse rotation gap according to claim 1, wherein: Wherein the material of the stop valve is dual-phase steel, The worm is made of stainless steel, The worm wheel is made of brass.
10. A system for preparing edible salt from seawater, characterized in that the high-precision high-pressure regulating valve for automatically eliminating reverse rotation clearance according to any one of claims 1-9 is used and integrated in a container.

Description

High-precision high-pressure regulating valve capable of automatically eliminating reverse rotation gap and system for preparing edible salt from seawater Technical Field The utility model belongs to the technical field of regulating valves, and particularly relates to a high-precision high-pressure regulating valve capable of automatically eliminating a reverse rotation gap and a salt making system by using seawater. Background The traditional method for preparing sea salt mainly comprises a salt boiling method, a sun-drying method and a spray evaporation method, and the traditional methods have the defects that the salt boiling method can only be used for preparing industrial salt and has high energy consumption, the sun-drying method needs large occupied area and more manpower, the production period is long, and the spray evaporation method also needs large occupied area and has high energy consumption. Therefore, in order to make edible salt from seawater more efficiently and energy-effectively, the sea salt resource is fully utilized, and a novel system for making edible salt from seawater is needed. At present, a system for preparing fresh water by a membrane method is available for collecting, filtering and reverse osmosis treatment of sea water to obtain fresh water and concentrated sea water (strong brine), and the inventor improves on the above-mentioned system for preparing fresh water by sea water to form a system for preparing edible salt by sea water, and integrates the system into a space of a container in consideration of convenience of transportation and deployment in actual use. In such new systems, a flow control valve is required for use with the ultrafiltration module and reverse osmosis membrane therein. Although various flow regulating valves exist on the market, the flow regulating valve is difficult to be suitable for the new system. The current flow regulating valves on the market mainly have the following problems: (1) The regulation precision is low, the traditional valve (such as a common stop valve and a ball valve) is driven manually or simply electrically, and a mechanical transmission part has backlash (such as a screw clearance of a screw rod), so that response is lagged during flow regulation, and high-precision dynamic control is difficult to realize. (2) The pressure resistance is insufficient, the tightness of the valve body is easy to lose efficacy under the extreme working condition of high pressure (6-15 MPa) or low pressure (0-6 MPa), the leakage risk is increased, and particularly, when the valve core and the valve seat are impacted by high flow, the valve core and the valve seat are easy to wear, so that the service life is shortened. (3) The material has poor corrosion resistance, and under the environment of high corrosive media such as seawater, the valve body and the transmission part made of common stainless steel or cast iron are easy to generate pitting corrosion or stress corrosion cracking, so that the valve is invalid. (4) The structure is complex, the maintenance is difficult, the existing regulating valve is mainly in split type design, the transmission mechanism is connected with the valve body in a complex manner, the disassembly and maintenance are required to be stopped, the continuity of the system is affected, the modularization degree is low, and the replacement cost of parts is high. (5) And the dynamic response delay is that a valve driven by a common motor is adopted, so that the torque control is inaccurate, a real-time feedback mechanism is lacked, the flow change requirement is difficult to respond quickly, and the system efficiency is reduced. (6) And a control error caused by back clearance is that a clearance (such as a worm and worm wheel meshing clearance and a screw rod and nut clearance) in a mechanical transmission chain generates idle stroke during reverse movement, so that flow adjustment errors are accumulated, and the stability of technological parameters is affected. (7) The existing flow regulating valve is huge in size and is not suitable for a seawater salt making system integrated in a small space of a container by the inventor, so that the system occupies too much space. Disclosure of utility model The present utility model has been made to solve the above problems, and an object of the present utility model is to provide a high-precision high-pressure regulating valve and a salt making system using seawater, which automatically eliminate a reverse rotation gap. The utility model provides a high-precision high-pressure regulating valve capable of automatically eliminating a reverse rotation gap, which is characterized by comprising a servo motor, a worm wheel, a ball screw part and a stop valve, wherein the servo motor directly or indirectly drives the worm to rotate, a spiral tooth is arranged on the worm, a tooth groove matched with the spiral tooth is arranged on the peripheral side wall surface of the worm, the axis d