Pressure adjusting device

Abstract

The invention discloses a pressure adjusting device which comprises a valve body and a buffer assembly, the valve body is used for steam circulation, an air outlet cavity and an air inlet cavity which are communicated with each other are formed in the valve body, a communicating groove is formed in the communicating position of the air outlet cavity and the air inlet cavity, and a closed valve element is movably installed in the communicating groove and can move in the radial direction of the valve body. Comprising a buffer plate arranged in an air inlet cavity, the buffer plate is provided with a buffer face used for adjusting the moving direction of fluctuating steam, and the buffer face is provided with a flowing groove allowing the steam to flow. The check valve has the beneficial effects that through the arrangement of the buffer plate, direct contact between flowing steam and the closed valve element is avoided, the number of times that steam flowing force directly acts on the closed valve element is reduced, and therefore the situation that the closed valve element can be damaged is reduced; the influence of fluctuating steam pressure on the use of the closed valve core is avoided, and the protection on the closed valve core is further improved.

Description

Technical Field

[0001] The present invention relates to the field of air pressure regulating equipment, in particular to a pressure regulating device. Background Art

[0002] Pressure regulating devices are widely used in steam pipelines because steam in industry is mainly generated by boiler combustion. The steam pressure is easily changed due to boiler fuel addition or other external factors, and it is not easy to maintain a stable value. Therefore, the output steam pressure needs to be adjusted to keep it within a stable range.

[0003] Existing pressure regulating devices mainly use valve core displacement to change the cross-sectional area of the steam channel to achieve steam pressure regulation. However, under normal conditions, the fluctuating steam airflow will directly hit the valve core under the change of steam pressure. After long-term use, the valve core is easily damaged, thereby affecting the regulation of steam pressure. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the regulating valve core in the existing pressure regulating device is easily damaged due to the continuous impact of the steam airflow, thereby affecting the steam pressure regulation.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a pressure regulating device, which includes a valve body for steam circulation, wherein the valve body is provided with an air outlet cavity and an air inlet cavity that are interconnected, and a connecting groove is provided at the connection point between the air outlet cavity and the air inlet cavity, and a closed valve core is movably installed in the connecting groove, and the closed valve core can move along the radial direction of the valve body, and a buffer assembly includes a buffer plate arranged in the air inlet cavity, the buffer plate is provided with a buffer surface for adjusting the movement direction of fluctuating steam, and the buffer surface is provided with a flow groove for steam flow.

[0006] As a preferred solution of the pressure regulating device of the present invention, a swirl space for controlling the swirl of fluctuating steam is constructed between the buffer plate and the inner wall of the air inlet chamber, and a buffer space is constructed between the side of the buffer plate away from the buffer surface and the connecting groove.

[0007] As a preferred solution of the pressure regulating device of the present invention, wherein: a closed shell whose inner cavity is connected to the air outlet cavity is installed on the valve body, a switch assembly for controlling the movement of the closed valve core is provided in the closed shell, and the switch assembly includes a closing part fixedly installed in the closed shell, a closing rod is provided on the closing part, and the closing rod slides through the closing part, and the closing rod is fixed to the closed valve core at one end close to the communicating groove.

[0008] As a preferred solution of the pressure regulating device of the present invention, a switch spring is wound around the outside of the closing rod, one end of the switch spring is fixed to the closing member, and the other end is provided with a switch plate fixed to the closing rod, and the switch plate is slidably connected to the inner cavity of the closing shell.

[0009] As a preferred solution of the pressure regulating device of the present invention, a sealing member is installed in the air outlet cavity and inside the connecting groove, a through hole is provided at the center of the sealing member for sliding of the closing rod, and the inner wall of the through hole is tightly fitted with the outer wall of the closing rod, and the side of the sealing member away from the connecting groove is in conflict with the switch plate.

[0010] As a preferred solution of the pressure regulating device of the present invention, the closed shell is further provided with a regulating component for regulating the internal pressure of the air outlet cavity, the regulating component includes an elastic member installed in the closed shell, an regulating rod is fixedly installed on the side of the elastic member close to the valve body, an regulating groove is provided on the end of the regulating rod away from the elastic member, and an regulating slider fixed to the closed rod is slidably installed in the regulating groove.

[0011] As a preferred solution of the pressure regulating device of the present invention, a regulating cavity is constructed between the side of the elastic member away from the regulating rod and the inner wall of the closed shell, and a connecting pipe for connecting the air outlet cavity and the regulating cavity is installed on the valve body.

[0012] As a preferred solution of the pressure regulating device of the present invention, an regulating spring is wound inside the closed shell and outside the regulating rod, one end of the regulating spring is in conflict with the elastic member, and the other end is fixedly installed with an regulating plate that is slidably connected to the regulating rod.

[0013] As a preferred solution of the pressure regulating device of the present invention, the closed shell is provided with a control member for driving the movement of the regulating plate, the control member includes an adjusting threaded rod rotatably mounted on the closed shell, and the adjusting threaded rod is threadedly connected to the regulating plate, an adjusting gear is coaxially fixed on the adjusting threaded rod, the external rotation of the adjusting gear extends to the outside of the closed shell, and is engaged with an adjusting gear ring, and the external fixed sleeve of the adjusting gear ring is provided with an adjusting sleeve rotatably connected to the closed shell.

[0014] As a preferred solution of the pressure regulating device of the present invention, the outside of the closed shell is provided with a pressure scale line, and the regulating sleeve is provided with an indicating groove that cooperates with the pressure scale line.

[0015] The beneficial effects of the pressure regulating device of the present invention are as follows: the closed valve core is opened by the switch assembly, so that the steam in the air inlet chamber can flow out through the connecting groove and the air outlet chamber for use in industrial production. In addition, the steam pressure in the air outlet chamber can be adjusted by the regulating assembly as needed, thereby expanding the scope of application of the equipment. The setting of the buffer plate avoids direct contact between the flowing steam and the closed valve core, reduces the number of times the steam flow force directly acts on the closed valve core, thereby reducing the situation where the closed valve core may be damaged and extending the service life of the closed valve core. At the same time, the setting of the buffer space can avoid the fluctuating steam pressure from affecting the use of the closed valve core by gathering steam, further improving the protection of the closed valve core. The setting of the seal makes it difficult for the steam in the valve body to flow to the inside of the closed shell and corrode related structures, thereby extending the service life of the switch assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0017] Figure 1 Shows a schematic diagram of the three-dimensional structure of the invention;

[0018] Figure 2 Shows a schematic diagram of the front cross-sectional structure of the invention;

[0019] Figure 3 Shown Figure 3 Schematic diagram of the enlarged structure of area A in the middle;

[0020] Figure 4 A schematic diagram of the top view of the structure of the invention is shown. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0022] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0023] This embodiment provides a pressure regulating device, such as Figure 1 and Figure 2As shown, the valve body 1 is divided into an air outlet chamber 12 and an air inlet chamber 11 according to the flow order with the steam. A connecting groove 13 for connecting the air inlet chamber 11 and the air outlet chamber 12 is provided in the air outlet chamber 12 and the air inlet chamber 11. A closed valve core 14 is slidably installed in the connecting groove 13. A closed shell 3 is detachably installed on the valve body 1. The closed shell 3 is provided with a switch component 4 for opening and closing the closed valve core 14 and a regulating component 5 for regulating the steam pressure inside the air outlet chamber 12.

[0024] When in use, the valve body 1 is installed on the relevant pipeline or equipment through the connecting flanges provided at both ends of the valve body 1, and then steam is input into the air inlet chamber 11. At this time, the closing valve core 14 provided inside the valve body 1 can be used to close the connecting groove 13. When the steam pressure in the air inlet chamber 11 reaches the set value, the closing valve core 14 can be opened by the switch component 4, so that the steam in the air inlet chamber 11 can flow out through the connecting groove 13 and the air outlet chamber 12 for use in industrial production. In addition, the steam pressure in the air outlet chamber 12 can be adjusted by the adjustment component 5 as needed, thereby expanding the scope of use of the equipment.

[0025] like Figure 2 As shown, a buffer plate 21 is fixedly installed in the air inlet chamber 11, and a buffer surface 22 for changing the flow direction of steam is provided on the buffer plate 21. A swirl space 24 is constructed between the buffer surface 22 and the inner wall of the air inlet chamber 11, and a buffer space 25 is constructed between the side of the buffer plate 21 opposite to the buffer surface 22 and the connecting groove 13. The buffer space 25 and the swirl space 24 are connected through a flow groove 23 provided on the buffer plate 21.

[0026] When the steam enters the air inlet cavity 11, it will first contact the buffer surface 22 on the buffer plate 21. The buffer surface 22 directly collides with the steam airflow, which will curb the flow momentum of the steam airflow. The steam airflow buffered by the buffer surface 22 will swirl, thereby achieving the function of changing the flow direction of the steam airflow. However, the rotating steam airflow will be pushed forward by the airflow that has just entered the air inlet cavity 11, so that the steam airflow is trapped in the swirling space 24. As the air pressure in the swirling space 24 increases, the steam airflow will move along the buffer surface 22 until it finds the flow groove 23 that penetrates the buffer plate 21, and then enters the buffer space 25 along the flow groove 23, and enters the buffer space 25 in the buffer. Pressure accumulates in the buffer space 25. When the steam pressure in the buffer space 25 reaches the set value, the closed valve core 14 slidably installed at the connecting groove 13 will be pushed open and flow into the air outlet cavity 12 along the connecting groove 13. The setting of the buffer surface 22 avoids direct contact between the flowing steam and the closed valve core 14, reduces the number of times the steam flow force directly acts on the closed valve core 14, thereby reducing the possibility of damage to the closed valve core 14 and extending the service life of the closed valve core 14. In addition, the setting of the buffer space 25 can avoid the influence of fluctuating steam pressure on the use of the closed valve core 14 by gathering steam, thereby further improving the protection of the closed valve core 14.

[0027] like Figure 2 As shown, the buffer plate 21 is tilted in the air inlet cavity 11, and the flow groove 23 is opened on the buffer plate 21 in a direction perpendicular to the axial direction of the valve body 1. This arrangement makes it easy for the flowing steam to flow along the buffer surface 22 to the minimum point of the vortex space 24 when it contacts the buffer plate 21, and complete the direction change at the minimum point of the vortex space 24. During the conversion process, the contact between the steam airflow and the inner wall of the vortex space 24 is used to reduce the kinetic energy of the steam airflow. The direction of the flow groove 23 is set so that the steam airflow flowing into the buffer space 25 will first flow to the bottom of the buffer space 25, and after contacting the bottom of the buffer space 25, it will move upward, further reducing the flow kinetic energy of the steam airflow, reducing the force of the steam airflow acting on the closed valve core 14, and playing a role in protecting the closed valve core 14.

[0028] In conventional pressure regulating devices, the operator adjusts the opening and closing degree of the valve plate to adjust the flow rate of steam. In the present invention, the flow rate of steam entering the outlet cavity 12 can also be adjusted by specially setting the internal dimensions of the connecting groove 13. Figure 3 As shown, the internal dimensions of the flow groove 23 increase in sequence in the direction away from the valve body 1, which makes the closed valve core 14 move further away from the valve body 1 when it is opened, and the gap between the closed valve core 14 and the inner wall of the connecting groove 13 becomes larger, that is, the opening and closing degree of the connecting groove 13 becomes larger, thereby facilitating the rapid introduction of steam into the air outlet cavity 12 when the steam pressure is relatively high.

[0029] like Figure 2 As shown, a closing member 41 is fixedly installed inside the closing shell 3, and a closing rod 42 fixedly connected to the closing valve core 14 is slid through the closing member 41. A switch plate 44 is fixedly sleeved on the closing rod 42 and close to the closing valve core 14. A switch spring 43 is wrapped around the outside of the closing rod 42, with its two ends respectively fixed to the switch plate 44 and the closing member 41.

[0030] like Figure 2 As shown, the closing rod 42 contacts the closing valve core 14 under the action of the switch spring 43, thereby realizing operation in the closed connecting groove 13. When the steam pressure in the buffer space 25 rises, the connecting groove 13 is opened by pushing open the closing valve core 14 and compressing the switch spring 43. When the steam pressure in the buffer space 25 drops, the rebound force of the switch spring 43 pushes the closing rod 42 and the closing valve core 14 to reclose the connecting groove 13.

[0031] like Figure 3 As shown, a seal 45 is installed in the air outlet cavity 12 and above the connecting groove 13. A through hole 46 for the sliding of the closing rod 42 is provided at the central position of the seal 45. The inner wall of the through hole 46 fits tightly with the outer wall of the closing rod 42, which makes it difficult for the steam in the valve body 1 to flow into the interior of the closed shell 3 and corrode related structures, thereby extending the service life of the switch assembly 4.

[0032] like Figure 2 As shown, an elastic member 51 is detachably installed in the closed shell 3, and an adjusting rod 52 is fixedly installed on one side of the elastic member 51 close to the valve body 1, and an adjusting chamber 55 is constructed between the other side and the inner wall of the closed shell 3. The adjusting chamber 55 is connected to the air outlet chamber 12 through a connecting pipe 56. An adjusting groove 53 is provided on the end of the adjusting rod 52 close to the closed rod 42, and an adjusting slider 54 fixed to the adjusting rod 52 is slidably installed in the adjusting groove 53.

[0033] Because the regulating chamber 55 is connected with the air outlet chamber 12 through the connecting pipe 56, the air pressure in the connecting pipe 56 is consistent with that in the air outlet chamber 12. When the steam pressure in the air outlet chamber 12 reaches the set value, the steam in the regulating chamber 55 will squeeze the elastic member 51 to move toward the valve body 1. Because the regulating rod 52 is fixedly connected to the elastic member 51, the elastic member 51 will drive the regulating rod 52 to move synchronously. During the movement of the regulating rod 52, when one end of the regulating groove 53 provided on the regulating rod 52 contacts the regulating slider 54, the closing rod 42 will be driven to move downward by squeezing the regulating slider 54, thereby causing the closing valve core 14 fixedly connected to the closing rod 42 to close the communicating groove 13, thereby realizing the adjustment of the output air pressure of the valve body 1.

[0034] like Figure 2As shown, an adjusting spring 57 is wound around the outside of the adjusting rod 52, and one end of the adjusting spring 57 is in conflict with the elastic member 51, and the other end is fixedly installed with an adjusting plate 58 that is slidably connected to the adjusting rod 52. Therefore, the staff can control the compression degree of the adjusting spring 57 by controlling the movement of the adjusting plate 58, adjust the difficulty of the elastic member 51 to descend, and thereby realize the operation of controlling the steam pressure in the air outlet cavity 12.

[0035] like Figure 4 As shown, an adjusting sleeve 594 is rotatably installed on the outside of the closed shell 3, and an adjusting tooth ring 593 is fixed on the inner side of the adjusting sleeve 594. An adjusting gear 592 is engaged with the adjusting tooth ring 593 on the side close to the closed shell 3. An adjusting threaded rod 591 rotatably connected to the closing member 41 is coaxially fixed on the adjusting gear 592, and the adjusting threaded rod 591 is threadedly connected to the adjusting plate 58.

[0036] Therefore, when the adjusting sleeve 594 is rotated, the adjusting gear ring 593 can be driven to rotate. The mutual engagement between the adjusting gear ring 593 and the adjusting gear 592 will synchronously drive the adjusting gear 592 to rotate. Because the adjusting gear 592 is coaxially fixed with the adjusting threaded rod 591, the adjusting gear 592 will drive the adjusting threaded rod 591 to rotate. Figure 2 As shown, two adjusting threaded rods 591 are provided inside the closed shell 3. The two adjusting threaded rods 591 are used to limit the mutual positioning of the adjusting plate 58, so that the adjusting plate 58 will not rotate during the rotation of the adjusting threaded rods 591, and can only move up and down along the adjusting threaded rods 591, thereby achieving the effect of controlling the compression degree of the adjusting spring 57.

[0037] like Figure 1 As shown, a pressure scale line 595 is arranged around the outside of the closed shell 3, and an indicator groove 596 that cooperates with the pressure scale line 595 is also provided on the adjusting sleeve 594. Therefore, when the staff adjusts the steam output pressure of the valve body 1, the steam output pressure of the valve body 1 can be driven by the mutual cooperation between the indicator groove 596 and the pressure scale line 595.

[0038] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A pressure regulating device, characterized in that: include, A valve body (1) is used for steam circulation. The valve body (1) is provided with an air outlet cavity (12) and an air inlet cavity (11) that are connected to each other. A connecting groove (13) is provided at the connecting point between the air outlet cavity (12) and the air inlet cavity (11). A closed valve core (14) is movably installed in the connecting groove (13). The closed valve core (14) can move along the radial direction of the valve body (1). The buffer assembly (2) comprises a buffer plate (21) arranged in an air inlet cavity (11), the buffer plate (21) being provided with a buffer surface (22) for adjusting the movement direction of fluctuating steam, and the buffer surface (22) being provided with a flow groove (23) for steam flow.

2. The pressure regulating device according to claim 1, characterized in that: A swirling space (24) for controlling the swirling of fluctuating steam is constructed between the buffer plate (21) and the inner wall of the air inlet cavity (11), and a buffer space (25) is constructed between the side of the buffer plate (21) away from the buffer surface (22) and the connecting groove (13).

3. The pressure regulating device according to claim 2, characterized in that: The valve body (1) is provided with a closed shell (3) whose inner cavity is connected to the air outlet cavity (12); a switch assembly (4) for controlling the movement of the closed valve core (14) is provided in the closed shell (3); the switch assembly (4) includes a closed part (41) fixedly installed in the closed shell (3); a closed rod (42) is provided on the closed part (41), and the closed rod (42) slides through the closed part (41); the closed rod (42) is fixedly connected to the closed valve core (14) at one end close to the connecting groove (13).

4. The pressure regulating device according to claim 3, characterized in that: A switch spring (43) is wound around the outside of the closing rod (42), one end of the switch spring (43) is fixedly connected to the closing member (41), and the other end is provided with a switch plate (44) fixedly connected to the closing rod (42), and the switch plate (44) is slidably connected to the inner cavity of the closing shell (3).

5. The pressure regulating device according to claim 4, characterized in that: A sealing member (45) is installed in the air outlet cavity (12) and inside the connecting groove (13). A through hole (46) for sliding the closing rod (42) is provided at the center of the sealing member (45). The inner wall of the through hole (46) is in close contact with the outer wall of the closing rod (42). The side of the sealing member (45) away from the connecting groove (13) contacts the switch plate (44).

6. The pressure regulating device according to claim 5, characterized in that: The closed shell (3) is also provided with an adjustment component (5) for adjusting the internal pressure of the air outlet cavity (12), and the adjustment component (5) includes an elastic member (51) installed in the closed shell (3), and an adjustment rod (52) is fixedly installed on the side of the elastic member (51) close to the valve body (1), and an adjustment slot (53) is provided on the end of the adjustment rod (52) away from the elastic member (51), and an adjustment slider (54) fixedly connected to the closed rod (42) is slidably installed in the adjustment slot (53).

7. The pressure regulating device according to claim 6, characterized in that: An adjusting chamber (55) is constructed between the side of the elastic member (51) away from the adjusting rod (52) and the inner wall of the closed shell (3), and a connecting pipe (56) for connecting the air outlet chamber (12) and the adjusting chamber (55) is installed on the valve body (1).

8. The pressure regulating device according to claim 7, characterized in that: An adjusting spring (57) is wound inside the closed shell (3) and outside the adjusting rod (52). One end of the adjusting spring (57) contacts the elastic member (51), and the other end is fixedly mounted with an adjusting plate (58) that is slidably connected to the adjusting rod (52).

9. The pressure regulating device according to claim 8, characterized in that: The closed shell (3) is provided with a control member (59) for driving the adjustment plate (58) to move. The control member (59) includes an adjustment threaded rod (591) rotatably mounted on the closed shell (41), and the adjustment threaded rod (591) is threadedly connected to the adjustment plate (58). An adjustment gear (592) is coaxially fixed on the adjustment threaded rod (591). The adjustment gear (592) rotates externally and extends to the outside of the closed shell (3) and is engaged with an adjustment gear ring (593). The adjustment gear ring (593) is externally fixedly sleeved with an adjustment sleeve (594) rotatably connected to the closed shell (3).

10. The pressure regulating device according to claim 9, characterized in that: The closed shell (3) is provided with a pressure scale line (595) on the outside, and the adjusting sleeve (594) is provided with an indicating groove (596) that cooperates with the pressure scale line (595).

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