Differential pressure control stop valve

Abstract

The pressure difference control stop valve comprises a valve body, a valve rod, a valve cover, a valve plate, an overpressure protection mechanism, a connecting rod set and a connecting pipe, an inlet and an outlet are formed in the two ends of the valve body respectively, the valve cover is arranged at the top of the valve body, a mounting cavity used for arranging the overpressure protection mechanism is formed in the valve cover, and the two ends of the valve rod penetrate through the valve cover. A valve plate is arranged at the end, extending into the valve body, of the valve rod and located at the top of a valve seat opening in the valve body, a connecting rod set used for driving the valve rod to move is arranged at the end, extending out of the valve cover, of the valve rod, one end of the connecting pipe is connected with the inlet end of the valve body through a connector, and the other end of the connecting pipe is connected with an overpressure protection mechanism. When the supply flow of a water station water pump is larger than the regional water consumption, the pressure of a main pipeline is conducted to the spring bolt side of the piston through the connecting pipe, the pressure in the pipeline pushes the piston to drive the spring bolt to move out of the bottom of the locking block, the locking spring forces the valve rod to drive the valve plate to block the opening of the valve seat, and therefore the overpressure automatic cut-off effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve especially relates to a pressure difference control stop valve. BACKGROUND

[0002] The municipal water supply carries out regional water supply through the main pipe, each region carries out the water supply into the house from the main pipe to the branch pipe, but in the water delivery process of the municipal water pipe main pipe, the flow of water station pump and the regional water consumption can cause the influence to the water pressure in the pipe, when the water station pump supply flow is greater than the regional water consumption, it is easy to cause the overpressure phenomenon of the municipal water pipe, and the branch pipe with weak pressure bearing capacity is easy to burst under the condition of serious overpressure, therefore, in order to solve the above problems, a pressure difference control stop valve is designed. UTILITY MODEL CONTENTS

[0003] In view of the deficiency of the prior art stop valve, the utility model aims at providing a pressure difference control stop valve, which has the advantages of automatic overpressure cut-off and protection of branch pipes.

[0004] To achieve the above object, one technical scheme of the utility model is: a pressure difference control stop valve, including valve body, valve rod, valve cover, valve plate, overpressure protection mechanism, connecting rod group and connecting pipe, the both ends of the valve body are provided with inlet and outlet respectively, the top of the valve body is equipped with valve cover, the valve cover is provided with installation cavity for setting overpressure protection mechanism, the both ends of the valve rod are penetrated through the valve cover, the one end of the valve rod is provided with valve plate and is inserted into the valve body, the valve plate is located at the top of the valve seat opening in the valve body, the one end of the valve rod is provided with connecting rod group for driving the valve rod to move, the one end of the connecting pipe is connected with the inlet end of the valve body through the joint, the other end of the connecting pipe is connected with the overpressure protection mechanism,

[0005] Preferably, the overpressure protection mechanism includes first locking assembly, second locking assembly, locking spring and lock block, the lock block is arranged in the valve cover and is fixedly connected with the middle part of the valve rod, the top of the lock block is provided with locking spring, the locking spring forces the valve rod to drive the valve plate to block the valve seat opening, the first locking assembly is arranged on one side of the valve cover, the first locking assembly is used for locking the lock block at the top, when the lock block is located at the top, the valve plate is away from the valve seat opening and is in the open state, the second locking assembly is arranged on the other side of the valve cover, the second locking assembly is used for locking the lock block at the bottom, when the lock block is located at the bottom, the valve plate is attached to the valve seat opening and is in the closed state.

[0006] Further preferably, the first locking assembly has piston, communication flow channel, positioning spring and lock tongue, the piston is axially slidably connected on the side wall of the valve cover, one side of the piston is provided with lock tongue, the other side of the piston is provided with positioning spring for forcing the lock tongue to stretch out, the lock tongue is used for abutting against the bottom of the lock block, the communication flow channel is arranged in the valve cover and is communicated with the connecting pipe and the lock tongue side of the piston.

[0007] Further preferably, the second locking assembly has a locking pin, a torsion spring and a locking slot, the locking pin is hinged at the top end of the valve cover and close to the side of the valve rod, the torsion spring is arranged at the rotation shaft of the locking pin to force it to adhere to the valve rod, the locking slot is arranged at the end of the valve rod extending out of the valve cover, and the locking pin is clamped into the locking slot when the valve rod drives the valve plate to adhere to the valve seat opening;

[0008] Preferably, the connecting rod group comprises a linkage rod and a driving rod, one end of the driving rod is hinged to the end of the valve rod extending out of the valve cover, one end of the linkage rod is hinged to the side close to the valve rod of the driving rod, and the other end of the linkage rod is hinged to the top of the valve rod, and the driving rod forms a force-saving connecting rod with the valve rod through the linkage rod;

[0009] The utility model discloses the beneficial effect is: 1, when the water station water pump supply flow is greater than the regional water consumption, the pressure of main pipeline and branch pipeline can rise, because the pressure of main pipeline is conducted to the piston lock tongue side through the connecting pipe, the pressure in the pipeline promotes the piston to drive the lock tongue to remove the lock block bottom, releases the elastic force of the lock block top locking spring, forces the valve rod to drive the valve plate to block up the valve seat opening, thereby realizes the effect of automatic cut -off of overpressure. 2, after the main pipeline and branch pipeline cut off, because the branch pipeline still has the water end, thereby can reduce the pressure in the branch pipeline, to realize the effect of protecting branch pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the sectional structure view of normal state of the utility model;

[0011] Figure 2 It is sectional structure view of overpressure cut -off state of the utility model;

[0012] Figure 3 It is the sectional structure view of normal state of the utility model; Figure 1 It is the local enlarged view of I area of the utility model;

[0013] Figure 4 It is the local enlarged view of II area of the utility model; Figure 2 Specific embodiment

[0014] The preferable embodiments of the utility model are described in detail in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model is more clearly and explicitly defined.

[0015] ​It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0016] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "provision", "setting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0017] Please refer to Figures 1 to 4 The utility model embodiment includes:

[0018] A differential pressure control stop valve, including valve body 1, valve stem 2, valve cover 3, valve plate 4, overpressure protection mechanism 5, connecting rod group 6 and connecting pipe 7, the both ends of valve body 1 have inlet 11 and outlet 12 respectively, the top of valve body 1 is equipped with valve cover 3, valve cover 3 has installation cavity for setting overpressure protection mechanism 5, the both ends of valve stem 2 are all through valve cover 3, the one end of valve stem 2 that stretches into valve body 1 inside is equipped with valve plate 4, valve plate 4 is located at the top of valve seat opening inside valve body 1, the one end of valve stem 2 that stretches out valve cover 3 is equipped with connecting rod group 6 for driving valve stem 2 to move, one end of connecting pipe 7 is connected with valve body 1 inlet 11 end through joint, the other end of connecting pipe 7 is connected with overpressure protection mechanism 5;

[0019] Overpressure protection mechanism 5 includes first locking assembly 8, second locking assembly 9, locking spring 51 and lock block 52, lock block 52 is arranged in valve cover 3 and is fixedly connected with the middle part of valve stem 2, locking spring 51 is arranged at the top of lock block 52, locking spring 51 forces valve stem 2 to drive valve plate 4 to block valve seat opening, first locking assembly 8 is arranged on one side of valve cover 3, first locking assembly 8 is used for locking lock block 52 at the top, when lock block 52 is located at the top, valve plate 4 is away from valve seat opening and is in the open state, second locking assembly 9 is arranged on the other side of valve cover 3, second locking assembly 9 is used for locking lock block 52 at the bottom, when lock block 52 is located at the bottom, valve plate 4 is attached to valve seat opening and is in the closed state;

[0020] The first locking assembly 8 has a piston 81, a communication flow channel 82, a positioning spring 83 and a lock tongue 84, the piston 81 is axially slidingly connected to the side wall of the valve cover 3, one side of the piston 81 is provided with the lock tongue 84, the other side of the piston 81 is provided with the positioning spring 83 for forcing the lock tongue 84 to extend, the lock tongue 84 is used to abut against the bottom of the lock block 52, the communication flow channel 82 is arranged in the valve cover 3 to communicate the connecting pipe 7 and the side of the piston 81 lock tongue 84;

[0021] The second locking assembly 9 has a lock pin 91, a torsion spring 92 and a locking groove 93, the lock pin 91 is hinged at the top end of the valve cover 3 and close to one side of the valve rod 2, the torsion spring 92 is arranged at the rotation shaft of the lock pin 91 to force it to abut against the valve rod 2, the locking groove 93 is arranged at the end of the valve rod 2 extending out of the valve cover 3, when the valve rod 2 drives the valve plate 4 to abut against the valve seat opening, the lock pin 91 is clamped into the locking groove 93;

[0022] The connecting rod group 6 includes a linkage rod 61 and a driving rod 62, one end of the driving rod 62 is hinged to the end of the valve rod 2 extending out of the valve cover 3, one end of the linkage rod 61 is hinged to the side of the valve rod 2 close to the hinged side of the driving rod 62, the other end of the linkage rod 61 is hinged to the top of the valve rod 2, the driving rod 62 forms a force-saving connecting rod with the valve rod 2 through the linkage rod 61;

[0023] Through the above arrangement, in the actual working process, the specific working principle is as follows:

[0024] First, the valve inlet 11 is installed in communication with the main pipeline, and the valve outlet 12 is installed in communication with the branch pipeline, at this time the valve is in the normal communication state as shown in the figure; Figure 1

[0025] When the water pump supply flow of the water station is greater than the regional water consumption, the pressure of the main pipeline and the branch pipeline will rise, because the main pipeline pressure is conducted to the side of the piston 81 lock tongue 84 through the connecting pipe 7, so that the pressure in the pipeline pushes the piston 81 to drive the lock tongue 84 to move out of the bottom of the lock block 52, so that the lock block 52 is not restricted; at this time, the locking spring 51 located at the top of the lock block 52 releases the elastic force, forcing the valve rod 2 to drive the valve plate 4 to block the valve seat opening; at the same time that the valve plate 4 completely blocks the valve seat opening, the torsion spring 92 forces the lock pin 91 to be clamped into the locking groove 93 for positioning, thereby realizing the effect of automatic cut-off under overpressure;

[0026] After the main pipeline and the branch pipeline are cut off, because the branch pipeline still has a water end, the pressure in the branch pipeline can be reduced, thereby realizing the effect of protecting the branch pipeline;

[0027] ​When the valve needs to be opened, first, the locking pin 91 is pushed out of the locking groove 93, and then the driving rod 62 is pressed downward to lift the valve rod 2, so that the valve plate 4 is away from the valve seat opening to connect the inlet 11 and the outlet 12, when the valve plate 4 is completely opened, the first locking assembly 8 locks the locking block 52 at the top, so that the valve plate 4 is kept in the open state;

[0028] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A differential pressure control stop valve characterized by, The utility model provides a valve body, valve stem, valve cover, valve plate, overpressure protection mechanism, connecting rod group and connecting pipe, the valve body both ends have import and export respectively, the valve body top is equipped with valve cover, the valve cover has the installation cavity for setting overpressure protection mechanism, the valve stem both ends all penetrate valve cover, the valve stem enters the valve body inside one end and is equipped with valve plate, the valve plate is located the top of valve seat opening inside the valve body, the valve stem is equipped with connecting rod group for driving the valve stem movement one end that stretches out valve cover, one end of connecting pipe is connected with valve body import end through joint, the other end of connecting pipe is connected with overpressure protection mechanism.

2. The differential pressure control globe valve according to claim 1, wherein The overpressure protection mechanism includes first locking assembly, second locking assembly, locking spring and lock block, the lock block is arranged in the valve cover and is fixedly connected with the middle part of the valve rod, the top of the lock block is provided with the locking spring, the locking spring forces the valve rod to drive the valve plate to block the valve seat opening, the first locking assembly is arranged on one side of the valve cover, the first locking assembly is used for locking the lock block on the top, when the lock block is located on the top, the valve plate is away from the valve seat opening and is in the opening state, the second locking assembly is arranged on the other side of the valve cover, the second locking assembly is used for locking the lock block on the bottom, when the lock block is located on the bottom, the valve plate is attached to the valve seat opening and is in the closed state.

3. A differential pressure control globe valve as defined in claim 2 wherein, The first locking assembly has a piston, a communication flow channel, a positioning spring and a lock tongue, the piston is axially slidably connected to the side wall of the valve cover, one side of the piston is provided with the lock tongue, the other side of the piston is provided with the positioning spring for forcing the lock tongue to stretch out, the lock tongue is used for abutting against the bottom of the lock block, the communication flow channel is arranged in the valve cover and is communicated with the connecting pipe and the lock tongue side of the piston.

4. The differential pressure control globe valve of claim 2, wherein, The second locking assembly has a lock pin, a torsion spring and a locking groove, the lock pin is hinged to the top end of the valve cover and is close to one side of the valve rod, the torsion spring is arranged at the rotation shaft of the lock pin and forces it to attach to the valve rod, the locking groove is arranged at one end of the valve rod that stretches out the valve cover, when the valve rod drives the valve plate to attach to the valve seat opening, the lock pin is clamped into the locking groove.

5. The differential pressure control globe valve of claim 1, wherein, The connecting rod group includes a linkage rod and a driving rod, one end of the driving rod is hinged to one end of the valve rod that stretches out the valve cover, one end of the linkage rod and the driving rod are hinged to the side close to the hinge side of the valve rod, the other end of the linkage rod and the top of the valve rod are hinged, and the driving rod forms a force-saving connecting rod with the valve rod through the linkage rod.

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