CN112879636A - Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor - Google Patents

Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor Download PDF

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Publication number
CN112879636A
CN112879636A CN202110186931.5A CN202110186931A CN112879636A CN 112879636 A CN112879636 A CN 112879636A CN 202110186931 A CN202110186931 A CN 202110186931A CN 112879636 A CN112879636 A CN 112879636A
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CN
China
Prior art keywords
valve
gear motor
valve rod
mechanical pilot
water hammer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110186931.5A
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Chinese (zh)
Inventor
田中山
杨昌群
高金杰
王现中
王永飞
牛道东
赵升吨
史铁峰
李育特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Jiaotong University
China Oil and Gas Pipeline Network Corp South China Branch
Original Assignee
Xian Jiaotong University
China Oil and Gas Pipeline Network Corp South China Branch
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Jiaotong University, China Oil and Gas Pipeline Network Corp South China Branch filed Critical Xian Jiaotong University
Priority to CN202110186931.5A priority Critical patent/CN112879636A/en
Publication of CN112879636A publication Critical patent/CN112879636A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The invention belongs to the technical field of water hammer relief valves, and particularly relates to a double-control axial flow mechanical pilot type water hammer relief valve directly driven by a gear motor, which comprises a valve body, a support cylinder, the gear motor, a valve rod, a mechanical pilot valve and a hand wheel, wherein the support cylinder is fixed on the valve body, a sealing end cover is arranged on the support cylinder, and the valve body comprises an inlet and an outlet; the valve rod penetrates through the support cylinder, the sealing end cover and the gear motor, one end of the valve rod is provided with a plug, and the other end of the valve rod is connected with the hand wheel; the plug extends into the valve body, and the axis of the inlet of the valve body is vertical to the axis of the valve rod; the valve rod is provided with an external thread section near the plug, and the external thread section is meshed with the internal thread arranged on the supporting cylinder. The gear motor is automatically and manually controlled by the mechanical pilot valve to directly drive the valve rod, so that the accurate control and automatic adjustment of the valve caliber are realized, and the pressure release valve is high in starting speed, convenient to adjust, high in safety and reliability and long in service life.

Description

Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor
Technical Field
The invention belongs to the technical field of water hammer relief valves, and particularly relates to a double-control axial flow mechanical pilot type water hammer relief valve directly driven by a gear motor.
Background
In a long-distance petroleum pipeline, water hammer can be caused by conditions such as accidental pump stop or abnormal opening and closing of a valve, and pipe explosion accidents can be caused by local overpressure in the pipeline. In order to ensure safe operation of long oil pipelines and associated equipment, surge relief valves are typically used to relieve surge pressure.
When water hammer occurs in the pipeline, the pressure release valve can be quickly opened and releases high-pressure medium, so that the pressure of the pipeline is restored to a normal range, and the aim of protecting the pipeline and equipment in the pipeline is fulfilled. Therefore, the opening speed of the pressure release valve in the water hammer is of great significance to the safe operation of the whole pipeline.
At present, the traditional water hammer relief valve mainly comprises three structural forms of an angle type, an axial flow type and a Y type. The normal action of the main valve is ensured by the pressure change in the valve cavity of the main valve and the spring of the main valve in principle. It has the following disadvantages:
1. the main valve cavity is communicated with the front pipeline and the rear pipeline through the pilot valve, liquid in the main valve cavity needs to be discharged during action and is limited by the pilot valve structure and the diameter of the pressure guiding pipe, and the liquid discharging speed in the main valve cavity is slow, so that the main valve cannot be opened quickly;
2. oil liquid needs to flow through the main valve cavity, so that the requirement on a liquid medium is high, and a filter needs to be installed, so that the traditional water hammer pressure release valve can only be used for a finished oil long delivery pipeline, and the application scene of the traditional water hammer pressure release valve is limited;
3. because of the existence of the main valve spring, the valve core vibrates during working, the abrasion of the valve core is aggravated, and the service life is short.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a double-control axial flow mechanical pilot type water hammer relief valve directly driven by a gear motor, which can automatically and manually control the gear motor to directly drive a valve rod through a mechanical pilot valve, thereby realizing accurate control and automatic adjustment of the valve caliber, and further ensuring that the relief valve has high starting speed, convenient adjustment, higher safety and reliability and longer service life.
The technical scheme for realizing the functions is as follows: a double-control axial flow mechanical pilot type water hammer relief valve directly driven by a gear motor is characterized in that:
comprises a valve body, a supporting cylinder, a gear motor, a valve rod, a mechanical pilot valve and a hand wheel,
the supporting cylinder is fixed on the valve body, a sealing end cover is arranged on the supporting cylinder, and the valve body comprises an inlet and an outlet;
the valve rod penetrates through the support cylinder, the sealing end cover and the gear motor, one end of the valve rod is provided with a plug, and the other end of the valve rod is connected with the hand wheel; the plug extends into the valve body, and the axis of the inlet of the valve body is vertical to the axis of the valve rod;
an external thread section is arranged on the valve rod close to the plug and is meshed with an internal thread arranged on the supporting cylinder;
the gear motor comprises a shell, a first gear and a second gear, the shell is provided with an oil suction port and an oil outlet,
an inlet of the valve body is connected to an oil inlet of the mechanical pilot valve through a first stop valve, and an oil outlet of the mechanical pilot valve is connected to an outlet of the valve body; an oil suction port and an oil outlet of the gear motor are respectively connected to two working ports of the mechanical pilot valve through pipelines, and a second stop valve is arranged between the two pipelines.
Further, the valve rod and the first gear are connected through a spline.
Further, an internal spline is arranged on the first gear, and an external spline is arranged on the valve rod.
Furthermore, a sealing ring is arranged between the supporting cylinder and the valve body.
Furthermore, the supporting cylinder is provided with a cavity, a packing cavity is formed between the inner wall of the cavity and the valve rod, and the sealing end cover compresses packing in the packing cavity through a packing gland.
Further, the hand wheel is fixed on the valve rod through a nut.
Furthermore, a gasket for preventing looseness is arranged between the hand wheel and the nut.
Furthermore, the hand wheel is provided with a mounting hole, the valve rod penetrates through the mounting hole, and the mounting hole limits the hand wheel.
The invention has the advantages that:
1. the main valve body oil inlet is communicated with the valve body oil outlet through the pilot valve and the gear motor, and the valve rod is directly driven to rotate through the gear motor during action, so that the valve disc is driven to move, the size of the middle caliber of the valve body is directly adjusted, and the valve body is quickly started and closed in the oil discharging and pressure releasing process;
2. meanwhile, the gear motor is subjected to double control in two modes of mechanical pilot valve automation and manual operation, so that the opening and closing of the valve are realized; when the mechanical pilot valve fails, the hand wheel can still be manually rotated to open the pressure release valve, so that the control reliability of the pressure release valve is improved, the gear motor can output large torque to realize accurate opening of the valve, and the opening accuracy of the valve is improved;
3. the traditional main valve spring is replaced by the mode that the valve rod is meshed with the support cylinder, so that the valve core is prevented from vibrating during working, and the service life of the pressure reducing valve is prolonged.
Drawings
FIG. 1 is a schematic structural view of a gear motor directly-driven double-control axial flow water hammer relief valve in a state that a valve port is closed;
FIG. 2 is a schematic view of a gear motor;
FIG. 3 is a schematic structural view of a gear motor directly-driven double-control axial flow water hammer relief valve in a state that a valve port is opened;
in the figure: 1. the valve comprises a valve body, 2, a plug, 3, a valve rod, 4, a sealing ring, 5, a supporting cylinder, 6, a packing, 7, a packing gland, 8, a sealing end cover, 9, a gear motor, 10, a hand wheel, 11, a gasket, 12, a nut, 13, a second stop valve, 14, a mechanical pilot valve, 15, a first stop valve, 91, a first gear, 92, a countershaft, 93, an oil outlet, 94, a second gear, 96 and an oil suction port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
A double-control axial flow mechanical pilot type water hammer relief valve directly driven by a gear motor comprises a valve body 1, a support cylinder 5, a gear motor 9, a valve rod 3, a mechanical pilot valve 14 and a hand wheel 10, wherein the support cylinder 5 is fixed on the valve body 1, a sealing end cover 8 is arranged on the support cylinder 5, and the valve body 1 comprises an inlet and an outlet;
the valve rod 3 penetrates through the support cylinder 5, the sealing end cover 8 and the gear motor 9, one end of the valve rod 3 is provided with a plug 2, and the other end of the valve rod is connected with a hand wheel 10; the plug 2 extends into the valve body 1, and the axis of the inlet of the valve body 1 is vertical to the axis of the valve rod 3; an external thread section is arranged on the valve rod 3 close to the plug 2 and is meshed with an internal thread arranged on the supporting cylinder 5; the gear motor 9 comprises a housing 73, a first gear 91 and a second gear 94, wherein the housing 73 is provided with an oil suction port 96 and an oil outlet 93, an inlet of the valve body 1 is connected to an oil inlet of the mechanical pilot valve 14 through a first stop valve 15, and an oil outlet of the mechanical pilot valve 14 is connected to an outlet of the valve body 1; the oil suction port 96 and the oil outlet port 93 of the gear motor 9 are respectively connected to two working ports of the mechanical pilot valve 14 through a pipeline, and the second stop valve 13 is installed between the two pipelines.
In a preferred embodiment of the present invention, the first gear 91 is provided with an internal spline, the valve stem 3 is provided with an external spline, and the valve stem 3 and the first gear 91 are connected by a sliding spline. Adopt spline connection to guarantee that first gear 91 drives valve rod 3 pivoted time, valve rod 3 can also reciprocate.
In a preferred embodiment of the present invention, a seal ring 4 is installed between the support cylinder 5 and the valve body 1.
And a packing 6 is arranged between the valve rod 3 and the support cylinder 5. The supporting cylinder 5 is provided with a cavity, a packing cavity is formed between the inner wall of the cavity and the valve rod 3, and the sealing end cover 8 compresses the packing 6 in the packing cavity through the packing gland 7.
As a preferred embodiment of the present invention, the hand wheel 10 is fixed to the valve stem 3 by a nut 12. A washer 11 for preventing looseness is arranged between the hand wheel 10 and the nut 12. Be equipped with the mounting hole on the hand wheel 10, the valve rod 3 passes the mounting hole, and the mounting hole is spacing to hand wheel 10.
Example (b):
as shown in fig. 1 to 3, a double-control axial flow mechanical pilot type water hammer relief valve directly driven by a gear motor 9 comprises a water hammer relief valve body 1, wherein a plug 2 is installed on an internal thread part of a support cylinder 5 with an internal thread in a meshing manner, the support cylinder 5 with the internal thread is installed on the valve body 1, a sealing ring 4 is installed between the support cylinder 5 with the internal thread and the water hammer relief valve body 1, a packing cavity is formed between the outer side of a valve rod 3 where the plug 2 is located and the inner part of the support cylinder 5 with the internal thread, packing 6 is installed in the packing cavity, the packing 6 is tightly pressed in the support cylinder 5 through a sealing end cover 8 and a packing gland 7, a hand wheel 10 is installed on the valve rod 3, the gear motor 9 for driving the valve rod 3 of the plug 2 is installed between the sealing end cover 8 and the hand wheel 10, and. An inlet of the valve body 1 is connected to an oil inlet of the mechanical pilot valve 14 through a first stop valve 15, and an oil outlet of the mechanical pilot valve 14 is connected to an outlet of the valve body 1; the oil suction port 96 and the oil outlet port 93 of the gear motor 9 are respectively connected to two working ports of the mechanical pilot valve 14 through a pipeline, and the second stop valve 13 is installed between the two pipelines.
The valve body 1 is an axial flow valve body, namely, the inlet axis of the valve body 1 is vertical to the axis of the valve rod 3.
The gear motor 9 may be an existing gear motor 9. The gear motor 9 comprises a housing, a first gear 91, a second gear 94, an oil suction opening 96 and an oil outlet 93, wherein an inner spline is arranged on the first gear 91, an outer spline is arranged on the valve rod 3, and the valve rod 3 is connected with the first gear 91 through a sliding spline. Adopt spline connection to guarantee that first gear 91 drives valve rod 3 pivoted time, valve rod 3 can also reciprocate. A second gear 94 is fixed to the countershaft 92.
The mechanical pilot valve 14 is in the left position during normal operation, and oil in the pipeline enters the oil suction port 96 of the gear motor 9 through the working port of the mechanical pilot valve 14, so that the gear motor 9 rotates clockwise, and the main valve is kept in a closed state. When the oil pressure continuously rises to exceed the set pressure of the spring, the oil pressure pushes the valve core to enable the mechanical pilot valve 14 to be in the right position in the working state, the oil pressure in the pipeline enters an oil outlet 93 of the gear motor 9 to absorb oil, the gear motor 9 rotates anticlockwise, the main valve is opened, and therefore the overpressure safety relief effect is achieved.
The hand wheel 10 is another mode for driving the choke plug 2, which is adopted when the main valve cannot be normally decompressed due to faults in work in a mode of preventing direct drive of the gear motor 9. When the gear motor 9 works normally, the second stop valve 13 is in a closed state, and when the gear motor 9 breaks down, the second stop valve 13 needs to be opened to close the first stop valve 15, and then the hand wheel 10 is rotated to drive the plug 2 to move upwards to open the valve port, so that the purpose of pressure relief is achieved.
The working principle of the invention is as follows:
in the process of normally conveying oil in the pipeline, the water hammer relief valve is in a closed state, when the water hammer phenomenon occurs in the pipeline, the oil at the position where the water hammer occurs is compressed due to the volume, and the oil pressure rapidly rises and is transmitted along the pipeline. The inlet end of the valve body 1 is connected with a main oil pipeline, and the outlet end of the valve body is connected with an oil tank and used for receiving oil discharged by pressure relief.
1) Gear motor 9 drives the pressure relief mode:
normally, the second cut-off valve 13 is closed, and the first cut-off valve 15 is opened. The mechanical pilot valve 14 sets a pressure threshold to 10MPa, and when the pressure threshold in the oil transportation pipeline is less than 10MPa, the pressure release valve is always kept in a closed state, see fig. 1.
When the liquid pressure in the valve cavity is lower than the pressure set by the mechanical pilot valve 14, the mechanical pilot type directional control valve is in a left working state, the oil in the pipeline enters the oil suction port 96 of the gear motor 9 through the mechanical pilot valve 14, the first gear 91 of the gear motor 9 rotates clockwise, the valve rod 3 moves downwards, and the main valve is closed. When the pressure in the pipeline suddenly rises to exceed the set pressure of the mechanical pilot valve 14, referring to fig. 3, it is proved that a water hammer phenomenon occurs in the pipeline, the oil pressure pushes the valve core to enable the mechanical pilot type directional control valve 12 to be in the right position in the working state, the oil pressure in the pipeline enters the oil outlet 93 of the gear motor 9, the first gear 91 of the gear motor 9 rotates anticlockwise to drive the plug 2 to move upwards to open the valve port, and therefore an overpressure safety relief effect is achieved.
2) The hand wheel drives the pressure release mode:
when the gear motor 9 and the mechanical pilot valve 14 have faults, the second stop valve 13 needs to be opened, the first stop valve 15 needs to be closed, then the main valve needs to be opened or closed in a mode of driving the valve rod 3 by the hand wheel 10, so that the inlet and the outlet of the valve body 1 of the water hammer relief valve are communicated, high-pressure oil flows from the inlet to the outlet, the oil pressure in a pipeline is reduced, and the effect of relieving pressure is achieved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present specification and the accompanying drawings, or directly or indirectly applied to other related system fields, are included in the scope of the present invention.

Claims (8)

1. The utility model provides a double control axial compressor machinery pilot-operated type water hammer relief valve that gear motor directly driven which characterized in that:
comprises a valve body (1), a supporting cylinder (5), a gear motor (9), a valve rod (3), a mechanical pilot valve (14) and a hand wheel (10),
the supporting cylinder (5) is fixed on the valve body (1), a sealing end cover (8) is arranged on the supporting cylinder (5), and the valve body (1) comprises an inlet and an outlet;
the valve rod (3) penetrates through the support cylinder (5), the sealing end cover (8) and the gear motor (9), one end of the valve rod (3) is provided with a plug (2), and the other end of the valve rod is connected with a hand wheel (10); the plug (2) extends into the valve body (1), and the axis of an inlet of the valve body (1) is vertical to the axis of the valve rod (3);
an external thread section is arranged on the valve rod (3) close to the plug (2), and the external thread section is meshed with an internal thread arranged on the supporting cylinder (5);
the gear motor (9) comprises a shell, a first gear (91) and a second gear (94), an oil suction port (96) and an oil outlet (93) are formed in the shell, and the first gear (91) drives the valve rod (3) to rotate;
an inlet of the valve body (1) is connected to an oil inlet of the mechanical pilot valve (14) through a first stop valve (15), and an oil discharge port of the mechanical pilot valve (14) is connected to an outlet of the valve body (1); an oil suction port (96) and an oil outlet (93) of the gear motor (9) are respectively connected to two working ports of the mechanical pilot valve (14) through pipelines, and a second stop valve (13) is arranged between the two pipelines.
2. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor as claimed in claim 1, is characterized in that:
the valve rod (3) is connected with the first gear (91) through a spline.
3. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor as claimed in claim 2, is characterized in that:
the first gear (91) is provided with an internal spline, and the valve rod (3) is provided with an external spline.
4. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor as claimed in claim 3, is characterized in that:
and a sealing ring (4) is arranged between the supporting cylinder (5) and the valve body (1).
5. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor according to claim 4, is characterized in that:
the supporting cylinder (5) is provided with a cavity, a packing cavity is formed between the inner wall of the cavity and the valve rod (3), and the sealing end cover (8) compresses the packing (6) in the packing cavity through the packing gland (7).
6. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor as claimed in claim 5, is characterized in that:
the hand wheel (10) is fixed on the valve rod (3) through a nut (12).
7. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor as claimed in claim 6, is characterized in that:
and a gasket (11) for preventing looseness is arranged between the hand wheel (10) and the nut (12).
8. The double-control axial flow mechanical pilot type water hammer relief valve directly driven by the gear motor as claimed in claim 7, is characterized in that:
be equipped with the mounting hole on hand wheel (10), valve rod (3) pass the mounting hole, and the mounting hole is spacing to hand wheel (10).
CN202110186931.5A 2021-02-09 2021-02-09 Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor Pending CN112879636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110186931.5A CN112879636A (en) 2021-02-09 2021-02-09 Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110186931.5A CN112879636A (en) 2021-02-09 2021-02-09 Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor

Publications (1)

Publication Number Publication Date
CN112879636A true CN112879636A (en) 2021-06-01

Family

ID=76056752

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110186931.5A Pending CN112879636A (en) 2021-02-09 2021-02-09 Double-control axial flow mechanical pilot type water hammer relief valve directly driven by gear motor

Country Status (1)

Country Link
CN (1) CN112879636A (en)

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